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Tested prompt · Writing prompt generator

Story prompts around one character: every AI model's reply, tested

We ran this everyday Writing prompt generator test input on all 19 models in llmwise, the way the tool runs it, and checked every reply the same way. Here's each one as it came, with whether it passed, what it cost and how long it took.

Based on 19 of our test runs on , through OpenRouter with the tool's own instructions and the app's settings. Updated .

Short answer

All 19 models passed this Writing prompt generator test input's check (key facts). The cheapest reply that passed was GPT-6 Luna's, at $0.000083; the fastest, GLM 5.3's in 1.5 s. The dearest reply, Claude Fable 5.1's, cost 321 times as much ($0.0267).

The prompt, as sent, and its check

Checked by key facts, the same way for every model.

Story prompts around one character (everyday)

Give me 5 original writing prompts on this theme, numbered, each one to three sentences with something at stake.

---
A lighthouse keeper named Maren.

Sent with the Writing prompt generator's own instructions as the system prompt, as a free run of the tool sends them.

The answer must state “maren”, “lighthouse”.

How the Writing prompt generator's test inputs are scored, with every model's results on all five.

Every model's result

All 19 models on this test input, in catalog order.

Every model's reply to “Story prompts around one character”
ModelResultCostTimeReply
Claude Fable 5.1AnthropicPassed: Stated all 2 facts with the section.$0.026710.3 s457 tokens
Claude Opus 5.5AnthropicPassed: Stated all 2 facts with the section.$0.01187.5 s467 tokens
Claude Sonnet 5.5AnthropicPassed: Stated all 2 facts with the section.$0.00646.9 s566 tokens
Claude Sonnet 5AnthropicPassed: Stated all 2 facts with the section.$0.00517.6 s417 tokens
Claude Haiku 5.5AnthropicPassed: Stated all 2 facts with the section.$0.000274.0 s454 tokens
Claude Haiku 4.5AnthropicPassed: Stated all 2 facts with the section.$0.00207.4 s348 tokens
GPT-6 AstraOpenAIPassed: Stated all 2 facts with the section.$0.016117.7 s266 tokens
GPT-6.1 SolOpenAIPassed: Stated all 2 facts with the section.$0.00176.3 s274 tokens
GPT-6 SolOpenAIPassed: Stated all 2 facts with the section.$0.00135.9 s205 tokens
GPT-6 LunaOpenAIPassed: Stated all 2 facts with the section.$0.0000833.6 s249 tokens
Gemini 3.1 Pro (preview)GooglePassed: Stated all 2 facts with the section.$0.010515.8 s373 tokens
Gemini 3.8 FlashGooglePassed: Stated all 2 facts with the section.$0.000854.1 s392 tokens
DeepSeek V4.1 FlashDeepSeekPassed: Stated all 2 facts with the section.$0.000601.9 s277 tokens
DeepSeek V4 ProDeepSeekPassed: Stated all 2 facts with the section.$0.00466.6 s278 tokens
Grok 4.7xAIPassed: Stated all 2 facts with the section.$0.004810.5 s325 tokens
Kimi K3MoonshotPassed: Stated all 2 facts with the section.$0.003410.0 s330 tokens
GLM 5.3Z.aiPassed: Stated all 2 facts with the section.$0.00131.5 s224 tokens
GLM 5.3 FlashZ.aiPassed: Stated all 2 facts with the section.$0.000164.0 s237 tokens
Mistral Large 4MistralPassed: Stated all 2 facts with the section.$0.007732.1 s147 tokens

Cost: what OpenRouter charged us for the reply. Time: from sending to the whole reply. Reply: its length in tokens, thinking not counted. In llmwise you pay per message, not per token: each of these replies counted as one message on Pro.

Every reply

Every reply passed: here they are from the cheapest up.

  1. GPT-6 Luna

    Passed: Stated all 2 facts with the section.

    1. During a storm, Maren spots a second lighthouse flashing from an island that sank decades ago. If she answers its signal, ships may follow it toward the rocks—but ignoring it could leave someone out there in the dark.
    
    2. Maren finds a salt-stiff letter wedged inside the lighthouse lantern, addressed to her by name and dated fifty years in the future. Its warning describes a shipwreck she can prevent, but the captain aboard is the person who once betrayed her.
    
    3. On the night the lighthouse’s final lamp is due to be dismantled, Maren hears someone pounding from inside the sealed glass room. She has one hour to decide whether to break the lens—and risk losing the light that keeps the harbor safe.
    
    4. Maren’s teenage son arrives at the lighthouse with a stolen boat and a confession: he has been secretly guiding refugees past the coast guard. Now an approaching patrol ship is asking her to shine the signal that will expose them.
    
    5. Every year, Maren lights a candle in the lighthouse window for the crew lost at sea with her sister. This year, a soaked stranger arrives claiming the sister survived—and asks Maren to keep the beacon dark until dawn.

    281 tokens in, 276 out (27 of them reasoning) · 3.6 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI ·

  2. GLM 5.3 Flash

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the Grettasker lighthouse alone for eleven years, and tonight the lamp's spare lens is cracked, the supply boat is a week late, and a ship is signaling distress from the reef.
    2. A stranger washes up on Maren's rocks claiming to be her brother, who drowned off this coast when they were children — and he knows things only her brother could know.
    3. The lighthouse authority sends Maren a letter: the station is being automated next month and she must leave. On her last night, she decides whether to log the strange second light she's been seeing out at sea for years, or keep it her secret forever.
    4. Maren discovers that her predecessor's logbook, hidden under the stairs, doesn't record weather or ships — it records names, dates, and debts, and the newest entry bears her own name in fresh ink.
    5. When a winter storm strands a young coast guard inspector at the lighthouse, Maren must hide the one thing that would cost her the job she can't survive losing: the small family she's quietly built among the rocks and wrecked boats.

    293 tokens in, 237 out · 4.0 s · $0.0002 · 1 message on Pro · answered by z-ai/glm-5.3-flash via Friendli ·

  3. Claude Haiku 5.5

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the lighthouse at Gull Point for thirty-one years, and the logbook in her hands shows an entry in her own handwriting for a night she has no memory of. Someone has written a second line beneath it, in a hand she doesn't recognize, and the tide is coming in.
    
    2. On the last night before the automated beacon arrives, Maren climbs the tower to light the lamp one final time, but the lens has been cracked by a stranger's hand. She has until dawn to decide whether to tell the mainland inspector who did it, and whether the stranger is still on the island.
    
    3. A ferry captain has been bringing Maren supplies for a decade, always leaving them at the same rock below the cliff. When he fails to show up one morning, she finds a sealed tin on the rock with her name on it and a request she cannot refuse.
    
    4. Maren's lamp has been signaling the same pattern of three long flashes every night for a year, and the fishing fleet has started steering by it. When she realizes the pattern is not hers and that someone on the water is answering, she must decide whether to stop the lamp and leave the boats in the dark.
    
    5. Maren is writing a letter to her estranged sister about the storm that wrecked their father's boat, but she keeps stopping because the lighthouse foghorn sounds only when she hums a certain tune. The sister has never known the song, and Maren is running out of paper and time.

    382 tokens in, 454 out · 4.0 s · $0.0003 · 1 message on Pro · answered by anthropic/claude-haiku-5.5 via Anthropic ·

  4. DeepSeek V4.1 Flash

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the Cape Idris light for nineteen years, but on the night the relief boat is due, the lamp mechanism jams with a supply ship full of schoolchildren sheltering offshore in fog. She has four hours, one flare, and a radio that only receives.
    
    2. When the mainland announces it will automate the Cape Idris light in the spring, Maren begins secretly altering the logbook so the inspectors will find the tower unsafe to leave unmanned — until her replacement arrives early and starts reading the entries.
    
    3. A half-drowned man washes up on Maren's rocks with a canvas bag that she recognizes as her brother's, though her brother drowned off that same point eleven years ago. She has until the tide turns to decide whether to hide him or signal the mainland.
    
    4. Maren has never told anyone that the light went dark for forty minutes on the night the *Ellery Rose* struck the reef, and now the shipping company's investigator is climbing the tower stairs with a photograph of the logbook page she tore out.
    
    5. Fourteen-year-old Ossian arrives at the lighthouse expecting to spend the summer with a grandmother he has never met, and Maren — who has spoken to no one in months — must decide by week's end whether to send him back on the supply boat or teach him the light.

    310 tokens in, 425 out (148 of them reasoning) · 1.9 s · $0.0006 · 1 message on Pro · answered by deepseek/deepseek-v4.1-flash via Together ·

  5. Gemini 3.8 Flash

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the light burning on the jagged reefs of Crow's End for forty years, but tonight the generator fails during the worst squall of the decade, and the cargo ship carrying her estranged daughter is bearing down on the rocks. With only five gallons of kerosene left and a shattered lantern pane, she must climb the frozen tower and decide which part of her life's work she is willing to burn to keep the flame alive.
    
    2. Isolated at the Black Sands Light, Maren discovers that the strange Morse code pulses answering her beacon aren't coming from a passing ship, but from beneath the surface of the tide pools. If she reports the phenomenon to the maritime authority, they will relieve her of duty for madness; if she doesn't, whatever is learning her signals will finish climbing the seawall tonight.
    
    3. Maren agreed to man the automated Cape Sorrow lighthouse solely because the law cannot touch anyone stationed on the sovereign rock, but a shipwreck washes an unconscious coastal detective onto her private beach. As a brutal gale prevents any rescue boats from arriving, Maren must nurse the lawman back to health without letting him see the forged identity papers taped inside the logbook.
    
    4. The Ministry has given Maren until sunrise to pack her bags and surrender the decommissioned lighthouse at Skua Point to the demolition crew. When she finds a family of undocumented refugees hiding inside the hollow brass gears of the Fresnel lens, handing over her keys means sending them straight into the custody of the patrol boats waiting in the harbor.
    
    5. Every evening, Maren tends the High Crag beacon that keeps the phantom ships of the bay from drifting inland to reclaim the coastal town that drowned them. When her apprentice accidentally shatters the protective warding crystal inside the lamp room, Maren has until the fog rolls over the lower bluffs to find a substitute vessel strong enough to trap two hundred years of vengeful spirits.

    294 tokens in, 392 out · 4.1 s · $0.0008 · 1 message on Pro · answered by google/gemini-3.8-flash via Google AI Studio ·

  6. GLM 5.3

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the lighthouse at Cape Verrin for eleven years without incident, but tonight the light refuses to catch, and a storm is rolling in with three ships visible on the horizon.
    
    2. When a body washes ashore clutching a letter addressed to Maren by name, she must decide whether to read it and reveal a past she fled two decades ago, or burn it and let the sea keep her secret.
    
    3. The lighthouse log requires an entry every single night, and Maren has just found a page written in her own handwriting describing a shipwreck that hasn't happened yet, dated tomorrow.
    
    4. Every keeper of the Verrin light has gone deaf within five years, and when Maren's hearing starts to fade, she realizes she can now hear something else in the fog that no one else ever survived long enough to describe.
    
    5. Maren's predecessor left behind a locked cabinet with one instruction: never open it during a fog. Tonight, stranded by the fog for a fourth straight day, she notices the cabinet has begun to hum.

    293 tokens in, 224 out · 1.5 s · $0.0013 · 1 message on Pro · answered by z-ai/glm-5.3 via Friendli ·

  7. GPT-6 Sol

    Passed: Stated all 2 facts with the section.

    1. When the lighthouse lamp goes out during a storm, Maren spots a ship steering toward the rocks. The spare lens is locked in a room her predecessor warned her never to open.
    
    2. Every morning, Maren finds a letter beneath the lighthouse door describing something that will happen at sea that day. The latest names a sailor she thought had drowned years ago.
    
    3. Maren has kept the lighthouse burning for forty years, though no ship has passed the island in ten. When a government inspector arrives to close it, she must decide whether to reveal who still follows its light.
    
    4. A child washes ashore clutching a brass key and insists Maren is their mother. Before she can learn where the child came from, a boat appears offshore, flying a flag she recognizes from her own childhood.
    
    5. On the night Maren plans to leave the lighthouse for good, its beam begins pointing inland instead of out to sea. By dawn, the nearby village has vanished from her view.

    281 tokens in, 205 out · 5.9 s · $0.0013 · 1 message on Pro · answered by openai/gpt-6-sol via OpenAI ·

  8. GPT-6.1 Sol

    Passed: Stated all 2 facts with the section.

    1. Every night, lighthouse keeper Maren sees a shipwreck in her beam that has not happened yet. When she recognizes her brother’s fishing boat among tomorrow’s wreckage, she must decide whether to abandon her post to warn him or keep the light burning for everyone else.
    
    2. Lighthouse keeper Maren receives a formal complaint from the village: her light is keeping a sea monster awake. The complaint includes a municipal seal, three witness statements, and a demand that she attend mediation before the creature starts sinking boats.
    
    3. On her last day before the lighthouse is automated, keeper Maren finds forty years of unsent letters hidden beneath the lantern-room floor. One names the person responsible for a rescue that made her a local hero—and mailing it could cost her the pension she needs.
    
    4. A child arrives at lighthouse keeper Maren’s door carrying a brass key and claiming to be her daughter from a future where the coast has vanished. The key fits a locked cabinet Maren has never opened, but the child begs her not to turn it until the tide reaches the stairs.
    
    5. During a winter siege, lighthouse keeper Maren is ordered to extinguish the light so an enemy fleet will founder on the rocks. Then a small boat carrying refugees enters the same channel, and she has only enough oil to guide one vessel safely ashore.

    281 tokens in, 274 out · 6.3 s · $0.0017 · 1 message on Pro · answered by openai/gpt-6.1-sol via OpenAI ·

  9. Claude Haiku 4.5

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the lighthouse beam turning for thirty years without missing a night, but tonight she finds the mechanism jammed and a storm rolling in faster than she can repair it. A fishing boat she knows is out there somewhere in the dark, and she has only her own body and whatever she can salvage to warn them.
    
    2. The new automation system will make Maren's job obsolete within a month, and she has nowhere else to go and no one waiting for her on the mainland. When she discovers the system has a fatal flaw that no one else has noticed, she must decide whether to report it or let it fail.
    
    3. Maren discovers a message in a bottle that washed ashore, written in her own handwriting, dated twenty years in the future and warning her not to light the beacon on a specific night. She has no memory of writing it, and that night is three days away.
    
    4. A stranger arrives at the lighthouse claiming to be Maren's daughter, born after Maren gave her up for adoption forty years ago, but something about her story doesn't add up. Maren wants to believe her, but the stranger keeps asking oddly specific questions about the lighthouse's layout and security.
    
    5. Maren is the only one who knows the lighthouse is built on a sinkhole that's been slowly widening for years, and she has been silently reinforcing the structure herself to keep it from collapsing. Now the geological survey team has arrived unannounced, and she has twenty-four hours to decide whether to confess or watch it all crumble.

    301 tokens in, 348 out · 7.4 s · $0.0020 · 1 message on Pro · answered by anthropic/claude-haiku-4.5 via Azure ·

  10. Kimi K3

    Passed: Stated all 2 facts with the section.

    1. Lighthouse keeper Maren has kept the beacon lit for eleven years without a single shipwreck on her watch, until the night the lamp burns through its last crate of oil with a storm rolling in and the supply boat three days overdue. She has to decide what she's willing to burn to keep the light alive.
    
    2. Every morning Maren finds something new washed up at the base of the lighthouse: a child's shoe, a wedding ring, a letter addressed to her by name. The handwriting is her own, and the letter is dated thirty years from now, warning her to extinguish the light before the new moon.
    
    3. When the mainland automates the lighthouses, Maren is the last keeper in the country, offered a pension and a cottage inland if she'll just hand over the keys. But she alone knows the light doesn't just warn ships away from the rocks; it keeps something on them.
    
    4. Maren takes in a half-drowned sailor who swears his ship followed her light straight onto the reef, even though her logbook shows the lamp was dark that night and she was asleep. If he's telling the truth, someone else was in her lighthouse, and the wreck killed fourteen men.
    
    5. Lonely and stubborn, Maren has fallen in love through months of signal-lamp flashes with the keeper of the lighthouse across the strait, a person she has never met. Now a relief boat finally offers to carry her across, and she must choose between the light she swore to tend and the stranger who might be the only person who understands her.

    368 tokens in, 345 out (15 of them reasoning) · 10.0 s · $0.0034 · 1 message on Pro · answered by moonshotai/kimi-k3 via Wafer ·

  11. DeepSeek V4 Pro

    Passed: Stated all 2 facts with the section.

    1. Maren, keeper of a failing lighthouse on a crumbling cliff, discovers a diary hidden in the lamp room that predicts tonight's storm will sink a ship carrying her estranged brother—but the entry is dated fifty years in the future.
    
    2. After decades alone, Maren's automated lighthouse gets a new AI assistant that begins overriding her commands to extinguish the light whenever a single black-hulled boat approaches, and she must decide whether to sabotage her only companion to save the unseen crew.
    
    3. Maren has one night to train her reckless teenage replacement before a mainland inspector arrives, but when the boy accidentally breaks the fog bell and a disabled ferry drifts toward the rocks, her secret colorblindness becomes the difference between guiding them in and watching them die.
    
    4. As a viral video turns Maren's remote lighthouse into a pilgrimage site, she finds an unsigned letter taped to the door offering to buy the island for cash; the same morning, her fresh water tank is found drained, and she realizes someone is willing to force her out before she can refuse.
    
    5. Maren, who keeps the light for a village that exiled her years ago, sees a distress flare from the shore on the one night the lamp fails to ignite—if she rows over to help, she risks arrest, but if she stays, a child's life is on the line.

    284 tokens in, 1,111 out (833 of them reasoning) · 6.6 s · $0.0046 · 1 message on Pro · answered by deepseek/deepseek-v4-pro-0813 via Wafer ·

  12. Grok 4.7

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the light at Gull Rock for eleven winters without missing a night, but tonight the lamp will not catch, and a freighter’s horn is already answering the fog. If the beam stays dark, the channel will take the ship, and the harbor will know exactly whose watch failed.
    
    2. When the supply boat fails to come, Maren finds a child’s oilskin coat folded on the gallery rail, still warm, with a note that says only “Do not light it.” She must decide whether the warning is a threat, a plea, or the last message from someone the sea has already claimed.
    
    3. Maren’s replacement is due at dawn, a young keeper who has never stood a storm watch, and the old logbook Maren was ordered to burn still sits open on the desk. Leaving it means the truth about the wreck of the Aster stays buried; taking it means Maren walks off the rock with proof that could ruin more than one life.
    
    4. A stranger rows out in calm weather and asks to buy the lighthouse for more money than Maren has ever seen, on the condition that the light go dark for one hour at midnight. Maren can refuse and stay poor on a rock no one else wants, or accept and learn what that hour is meant to hide.
    
    5. Maren has spoken to no one but the gulls since the last keeper died, and the voice on the radio tonight uses that keeper’s name and asks to be let in. Opening the door might end the loneliness; keeping it shut might be the only way to stay alive until morning.

    1,516 tokens in, 589 out (264 of them reasoning) · 10.5 s · $0.0048 · 1 message on Pro · answered by x-ai/grok-4.7 via xAI ·

  13. Claude Sonnet 5

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the light at Solvik Point for eleven winters, but tonight the automated relief crew arrives a week early with orders decommissioning the station, and she has forty minutes before the last ferry to decide whether to hand over her keys or hide the one thing in the tower she can't let them find.
    
    2. Every ship that passes Maren's lighthouse leaves her a small object on the rocks below, a tradition she never asked for and doesn't understand, until the night a fishing boat named after her dead sister runs aground exactly where the offerings always land.
    
    3. When the fog around her lighthouse refuses to lift for the ninth day running, Maren starts hearing her late husband's voice calling ship names through the horn, and she must decide whether to keep answering him or finally let the light go dark.
    
    4. Maren agrees to train her replacement, a nervous eighteen-year-old named Isko who confesses on his first night that he was sent by the mainland company to find out why three previous keepers of this lighthouse vanished without resigning.
    
    5. The government wants to convert Maren's lighthouse into a tourist beacon with an automatic bulb, but she knows the old lens has been quietly guiding one particular boat home every solstice for reasons she has never told anyone, and this is the last year it can find its way.

    380 tokens in, 436 out (19 of them reasoning) · 7.6 s · $0.0051 · 1 message on Pro · answered by anthropic/claude-sonnet-5 via Anthropic ·

  14. Claude Sonnet 5.5

    Passed: Stated all 2 facts with the section.

    1. On the night the lamp finally fails after forty years, Maren discovers that the spare part she ordered was never delivered, and a fishing fleet is somewhere out in the fog. She has only a wall of old logbooks, a cracked brass lens, and whatever she can remember about how her mentor once kept the light alive without power.
    
    2. Maren has kept the lighthouse alone for a decade, but this morning she finds two sets of wet footprints leading up from the rocks to her door and none leading back. The kettle is warm, and someone has been reading her private journal. She must decide whether to report it to the coast guard, knowing they might close the station if they think she can't manage on her own.
    
    3. The new automated system arrives on Thursday, and a cheerful technician named Idris tells Maren she has three days to pack before her job ends. She has never told anyone that the lighthouse holds her late wife's ashes, sealed into the wall of the lamp room. How far will she go to keep the light from being switched over?
    
    4. Every year on the anniversary of the wreck of the Calloway Rose, Maren finds a single object washed up at the foot of the tower: a shoe, a compass, a child's slate. This year it is a letter addressed to her, in her own handwriting, dated tomorrow. What does she do with a warning she doesn't remember writing?
    
    5. When a teenage runaway named Pilar hides in the supply shed during a storm, Maren agrees to shelter her until the ferry runs again, and neither of them expects the storm to last nine days. Pilar is carrying something she stole from someone who will come looking, and Maren has one radio, one rowboat, and a rule against lying to the mainland. Whose side will the keeper choose when the search boat appears on the horizon?

    382 tokens in, 566 out · 6.9 s · $0.0064 · 1 message on Pro · answered by anthropic/claude-sonnet-5.5 via Anthropic ·

  15. Mistral Large 4

    Passed: Stated all 2 facts with the section.

    1. Maren has tended the Thornwick Lighthouse for eleven years without a single visitor, but this morning she discovers a child's shoe wedged in the lantern mechanism, fresh and dry despite the storm last night. She knows the island has no children, so she must decide whether to investigate the impossible before the tide cuts her off from the mainland.
    
    2. Every night at 3 AM, Maren, keeper of the isolated Crow's Nest Lighthouse, signals a ship she has never seen, guided only by a radio voice that calls her by name, and tonight the voice warns her that her lighthouse is scheduled for demolition at dawn. She has until sunrise to choose between keeping her only friend in the world or letting him save her from a life she never wanted.
    
    3. The light in Maren's tower has begun to turn counterclockwise, drawing ships toward the rocks instead of away from them, and she discovers that the previous keeper left a logbook warning her never to let the beam stop. With the coast guard radio dead and a vessel running aground on the reef below, she must decide whether to break the one rule she swore to keep or watch another family drown.
    
    4. Maren, keeper of the last standing lighthouse, keeps the beam burning to guide refugee ships from the flooded coast, but when the sea rises so high that her island becomes the only dry land for fifty miles, a stranger washes ashore claiming to be from the future with a warning about the coming storm. She must decide whether his message is a salvation or a trap that will doom the survivors she is sworn to protect.
    
    5. After twenty years as keeper of the remote Sentinel Rock lighthouse, Maren finally receives a letter offering her a promotion to the mainland station she has always wanted, but the envelope also contains a photograph of her sister's child asking why Aunt Maren never visits. She has until the supply boat leaves tomorrow to decide which version of herself she is willing to abandon.

    287 tokens in, 3,582 out (3,435 of them reasoning) · 32.1 s · $0.0077 · 1 message on Pro · answered by mistralai/mistral-large-4-0 via Mistral ·

  16. Gemini 3.1 Pro

    Passed: Stated all 2 facts with the section.

    1. Maren has tended the Blackwood Shoals lighthouse for twenty years, but tonight the beam reveals a galleon that sank a century ago sailing smoothly through the jagged rocks. If she sounds the warning horn, the coastal patrol will think she has gone mad and force her into retirement, but if she does nothing, the ghostly crew might reach the sleeping mainland.
    
    2. As the last lighthouse keeper on a flooded Earth, Maren's only job is to keep the signal burning for the atmospheric dropships that occasionally bring fresh water. When her backup generator fails, she must climb down into the submerged, creature-infested lower levels of the tower to find the ancient solar fuses before the final supply ship passes her by forever.
    
    3. Every Tuesday, a glass bottle washes up on the rocks below Maren's lighthouse containing a beautifully written love letter meant for someone else. When the letters suddenly stop and a bruised, silent stranger arrives seeking shelter from a terrible storm, Maren must decide whether to risk her solitary safety to help the author she has secretly fallen in love with.
    
    4. Maren's isolated lighthouse on the jagged edge of the Scottish coast is the perfect place to hide a stolen painting worth millions. When three men in sharp suits arrive on the mainland ferry asking the locals about a reclusive keeper, Maren realizes she has until nightfall to either destroy the canvas or set a deadly trap in the spiral staircase.
    
    5. The beam at the top of the tower does not warn ships away from rocks, but instead guides lost souls back to the realm of the living, a sacred duty Maren inherited when her mentor vanished. One evening, the light catches the soul of a furious local merchant who threatens to haunt her family forever unless Maren breaks the rules and builds him a new body out of driftwood and sea glass.

    294 tokens in, 1,702 out (1,329 of them reasoning) · 15.8 s · $0.0105 · 1 message on Pro · answered by google/gemini-3.1-pro-preview via Google AI Studio ·

  17. Claude Opus 5.5

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the Harrow Point light for thirty-one years, and tomorrow the automation crew arrives to replace her with a timer and a solar panel. Tonight, for the first time in her career, a ship she doesn't recognize is signaling the lighthouse directly, and it seems to know her name.
    
    2. Every morning Maren logs the weather, the passing vessels, and one lie. When her estranged daughter inherits the logbooks after a storm takes the lighthouse keeper out to sea, she has to figure out which entries were lies and why.
    
    3. A boy washes up on the rocks below Maren's lighthouse clutching a brass compass engraved with the name of her brother, who drowned forty years ago. The boy insists he's never heard of him, and the compass needle points not north but straight at Maren.
    
    4. Maren, the most disagreeable lighthouse keeper on the Scottish coast, has driven off seven assistants in two years. The eighth is a relentlessly cheerful retired accountant named Duncan, and he has a secret deadline: if he can't make Maren laugh by midsummer, he loses a bet that will cost him his house.
    
    5. In a flooded future where the lighthouse is the last dry ground for miles, Maren decides each night whether to light the lamp, knowing it draws both refugees and the raiders who hunt them. Tonight a single small boat is rowing toward the rock, and she has one hour to choose.

    382 tokens in, 516 out (49 of them reasoning) · 7.5 s · $0.0118 · 1 message on Pro · answered by anthropic/claude-opus-5.5 via Google ·

  18. GPT-6 Astra

    Passed: Stated all 2 facts with the section.

    1. Every night, lighthouse keeper Maren sees a shipwreck in the beam exactly twenty-four hours before it happens. When her warning saves a fishing crew, the next vision shows their boat striking the ferry carrying her son.
    
    2. Lighthouse keeper Maren has three days to prove her station is worth saving before the council replaces it with an automated beacon. Her only volunteer for the inspection is a retired magician who insists the lighthouse’s greatest public service has nothing to do with ships.
    
    3. While repairing a stair, lighthouse keeper Maren finds forty years of letters addressed to her, all written in her own handwriting. The final envelope is dated tomorrow and contains the deed to a house she remembers burning down.
    
    4. Lighthouse keeper Maren has quietly sheltered stranded sailors for twenty years, but the young woman who arrives during a winter storm carries a warrant for Maren’s arrest. With the supply boat overdue and the lamp failing, they must decide how much of their histories to believe.
    
    5. On the morning of her wedding, lighthouse keeper Maren discovers that someone has replaced the lamp with a jar of fireflies, and every boat in the harbor is following their light inland. Her fiancé wants to flee before the tide rises through the streets; Maren recognizes the jar from a promise she made as a child.

    281 tokens in, 266 out · 17.7 s · $0.0161 · 1 message on Pro · answered by openai/gpt-6-astra via OpenAI ·

  19. Claude Fable 5.1

    Passed: Stated all 2 facts with the section.

    1. Maren has kept the light on Skerry Point for eleven years without a single wreck, and tonight the automation crew arrives on the morning ferry to replace her with a timer. She has until dawn to decide whether the fog she can see rolling in is reason enough to hide the spare bulbs.
    
    2. Every winter solstice a rowboat drifts ashore beneath Maren's lighthouse carrying one object and no passenger; this year it carries her own coat, the one she lost overboard as a child. Who is sending these things, and what happens if she finally rows out to meet the sender?
    
    3. Write a comic account of the week Maren's lighthouse is chosen as the backdrop for a prestige television drama, and the director insists the beam should sweep "more emotionally." The tanker captain three miles out does not find it funny.
    
    4. When Maren's grown son arrives unannounced with a lawyer and papers declaring the lighthouse and its island his inheritance, she realizes he believes she is already dead. Tell the story of the dinner they share that night, and what each of them is trying not to say.
    
    5. Maren keeps the light on a stretch of coast where no ship has passed in forty years, paid by a foundation whose only instruction is never to let it go dark. On the night the generator fails and she must choose between burning the logbooks or the furniture, she discovers what the previous keepers wrote about the thing that comes when the light goes out.

    382 tokens in, 457 out · 10.3 s · $0.0267 · 1 message on Pro · answered by anthropic/claude-fable-5.1 via Google ·

More Writing prompt generator test inputs

The other Writing prompt generator test inputs, each with every model's reply, and the results across all five.

Questions

Which AI does best on “Story prompts around one character”?

All 19 models passed this Writing prompt generator test input's check (key facts). The cheapest reply that passed was GPT-6 Luna's, at $0.000083; the fastest, GLM 5.3's in 1.5 s. The dearest reply, Claude Fable 5.1's, cost 321 times as much ($0.0267).

What does a reply to “Story prompts around one character” cost?

Through the models' APIs, what OpenRouter charged us ran from $0.000083 (GPT-6 Luna) to $0.0267 (Claude Fable 5.1) for this test input. In llmwise you don't pay by the token: a reply like these counts as one message on Pro, whichever model answers.

Claude, GPT, Gemini, DeepSeek, Grok, Kimi, GLM, and Mistral, in one chat.

See what a message costs before you send it. Free is 5 messages to try; sign in with an email link, no password or card.