Model vs model
GPT-6 Luna vs Grok 4.7
GPT-6 Luna and Grok 4.7 are both in llmwise. What each gets on every plan, what it reads, how it's served and what happens when its provider fails, from the catalog and the code that runs them.
Model prices and specs checked against OpenRouter's GPT-6 Luna page, OpenRouter's Grok 4.7 page. Updated .
Short answer
GPT-6 Luna is an everyday model (60 messages a day on Pro); Grok 4.7 draws on the monthly allowance (up to 250 messages a month on Pro). Beyond that, they read the same files and neither is easier to try. In our test runs, GPT-6 Luna passed 47 of the 50 prompts both answered and Grok 4.7 47; 4 prompts split them, most on writing (5 to 3).
GPT-6 Luna vs Grok 4.7, prompt by prompt
Every prompt GPT-6 Luna and Grok 4.7 both answered, compared directly, their biggest differences first. One run each, through OpenRouter: a wait depends on the provider and the load that day, so a lead under 10% counts as close.
Of the 50 prompts both answered, both passed 45, only GPT-6 Luna passed 2, only Grok 4.7 passed 2, and neither passed 1. GPT-6 Luna answered sooner on 49 of the 50 and Grok 4.7 on 0; the rest were within 10% of each other. The 50 replies cost $0.0059 on GPT-6 Luna and $0.3875 on Grok 4.7: 65.7× less on GPT-6 Luna.
The 4 prompts only one of GPT-6 Luna and Grok 4.7 passed
Rewrite corporate jargon in plain words (writing): GPT-6 Luna passed and Grok 4.7 didn't. GPT-6 Luna: Graded 4.7 of 5 on average (lowest 4). Grok 4.7: Graded 3.7 of 5 on average (lowest 3).
Argue both sides of free buses (writing): GPT-6 Luna passed and Grok 4.7 didn't. GPT-6 Luna: Graded 4.3 of 5 on average (lowest 4). Grok 4.7: Graded 4.7 of 5 on average (lowest 4); but a paragraph of 100 words, over the 90 allowed.
Pens at 3 for $4 (math): Grok 4.7 passed and GPT-6 Luna didn't. GPT-6 Luna: Final answer 2 bundles and 4 singles for 12; expected 13.5. Grok 4.7: Final answer 3 packs + 1 single ( 13.50): right.
An article in three bullets (summarization): Grok 4.7 passed and GPT-6 Luna didn't. GPT-6 Luna: Graded 4.0 of 5 on average (lowest 3); but 61 words, over the 60 allowed. Grok 4.7: Graded 4.7 of 5 on average (lowest 4).
Job by job, the widest gaps first
Writing: GPT-6 Luna passed 5 of 5 and Grok 4.7 3 of 5. GPT-6 Luna answered 2.5× sooner at the median, 2.4 s against 6.0 s. GPT-6 Luna cost 57.8× less, $0.0005 against $0.0288 for the 5 replies. Their replies ran to about the same length.
Math: GPT-6 Luna passed 4 of 5 and Grok 4.7 5 of 5. GPT-6 Luna answered 5.3× sooner at the median, 2.2 s against 11.7 s. GPT-6 Luna cost 73.5× less, $0.0005 against $0.0362 for the 5 replies. Grok 4.7's replies ran 99% longer, in tokens of reply, thinking not counted.
Summarization: GPT-6 Luna passed 4 of 5 and Grok 4.7 5 of 5. GPT-6 Luna answered 1.9× sooner at the median, 1.5 s against 2.8 s. GPT-6 Luna cost 30.2× less, $0.0005 against $0.0141 for the 5 replies. Their replies ran to about the same length.
Translation: GPT-6 Luna passed 5 of 5 and Grok 4.7 5 of 5. GPT-6 Luna answered 6.9× sooner at the median, 1.6 s against 10.7 s. GPT-6 Luna cost 88.4× less, $0.0005 against $0.0410 for the 5 replies. Their replies ran to about the same length.
Coding: GPT-6 Luna passed 5 of 5 and Grok 4.7 5 of 5. GPT-6 Luna answered 6.9× sooner at the median, 4.6 s against 31.6 s. GPT-6 Luna cost 85.8× less, $0.0014 against $0.1229 for the 5 replies. Grok 4.7's replies ran 21% longer, in tokens of reply, thinking not counted.
Customer support: GPT-6 Luna passed 4 of 5 and Grok 4.7 4 of 5. GPT-6 Luna answered 8.3× sooner at the median, 1.4 s against 11.6 s. GPT-6 Luna cost 70.9× less, $0.0004 against $0.0306 for the 5 replies. Grok 4.7's replies ran 60% longer, in tokens of reply, thinking not counted.
Data analysis: GPT-6 Luna passed 5 of 5 and Grok 4.7 5 of 5. GPT-6 Luna answered 3.6× sooner at the median, 2.5 s against 8.9 s. GPT-6 Luna cost 63.2× less, $0.0009 against $0.0556 for the 5 replies. Grok 4.7's replies ran 65% longer, in tokens of reply, thinking not counted.
SQL: GPT-6 Luna passed 5 of 5 and Grok 4.7 5 of 5. GPT-6 Luna answered 2.5× sooner at the median, 1.2 s against 3.0 s. GPT-6 Luna cost 54.0× less, $0.0004 against $0.0240 for the 5 replies. GPT-6 Luna's replies ran 10% longer, in tokens of reply, thinking not counted.
Agents and tool use: GPT-6 Luna passed 5 of 5 and Grok 4.7 5 of 5. GPT-6 Luna answered 2.7× sooner at the median, 1.9 s against 5.2 s. GPT-6 Luna cost 48.5× less, $0.0004 against $0.0197 for the 5 replies. Their replies ran to about the same length.
RAG and answering from documents: GPT-6 Luna passed 5 of 5 and Grok 4.7 5 of 5. GPT-6 Luna answered 1.5× sooner at the median, 1.3 s against 1.9 s. GPT-6 Luna cost 37.7× less, $0.0004 against $0.0146 for the 5 replies. GPT-6 Luna's replies ran 25% longer, in tokens of reply, thinking not counted.
All 50 prompts: who passed, who answered sooner, who cost less
| Prompt | Result | Sooner | Cheaper |
|---|---|---|---|
| Turn a title into a URL slug | Both passed | GPT-6 Luna, 6.2×took 2.3 s and 14.3 s | GPT-6 Luna, 91.3×cost $0.0001 and $0.0078 |
| Parse a duration like “1h 30m” | Both passed | GPT-6 Luna, 6.9×took 4.6 s and 31.6 s | GPT-6 Luna, 66.6×cost $0.0003 and $0.0167 |
| Merge overlapping intervals | Both passed | GPT-6 Luna, 4.1×took 1.5 s and 6.1 s | GPT-6 Luna, 41.3×cost $0.0001 and $0.0045 |
| Evaluate an arithmetic expression, no eval | Both passed | GPT-6 Luna, 12.4×took 8.8 s and 110.1 s | GPT-6 Luna, 102.9×cost $0.0006 and $0.0574 |
| Parse CSV with quoted fields | Both passed | GPT-6 Luna, 10.1×took 7.2 s and 72.2 s | GPT-6 Luna, 84.9×cost $0.0004 and $0.0364 |
| Announce a second bakery shop on LinkedIn | Both passed | GPT-6 Luna, 5.5×took 2.9 s and 16.1 s | GPT-6 Luna, 82.2×cost $0.0001 and $0.0093 |
| Rewrite corporate jargon in plain words | Only GPT-6 Luna | GPT-6 Luna, 8.4×took 2.4 s and 20.0 s | GPT-6 Luna, 108.1×cost $0.0001 and $0.0112 |
| Decline a meeting and offer two times | Both passed | GPT-6 Luna, 2.0×took 1.3 s and 2.5 s | GPT-6 Luna, 33.5×cost $0.0001 and $0.0024 |
| A product announcement with five rules | Both passed | GPT-6 Luna, 1.7×took 1.5 s and 2.5 s | GPT-6 Luna, 32.2×cost $0.0001 and $0.0025 |
| Argue both sides of free buses | Only GPT-6 Luna | GPT-6 Luna, 2.4×took 2.5 s and 6.0 s | GPT-6 Luna, 25.5×cost $0.0001 and $0.0034 |
| A discount, then sales tax | Both passed | GPT-6 Luna, 1.5×took 3.1 s and 4.8 s | GPT-6 Luna, 44.4×cost $0.0001 and $0.0033 |
| Pens at 3 for $4 | Only Grok 4.7 | GPT-6 Luna, 6.5×took 2.9 s and 18.5 s | GPT-6 Luna, 79.9×cost $0.0001 and $0.0111 |
| Compound interest over three years | Both passed | GPT-6 Luna, 3.9×took 2.0 s and 8.0 s | GPT-6 Luna, 63.4×cost $0.0001 and $0.0051 |
| Four-digit numbers whose digits sum to 9 | Both passed | GPT-6 Luna, 7.6×took 2.0 s and 15.1 s | GPT-6 Luna, 92.1×cost $0.0001 and $0.0093 |
| The highest of three dice is a 5 | Both passed | GPT-6 Luna, 5.3×took 2.2 s and 11.7 s | GPT-6 Luna, 75.3×cost $0.0001 and $0.0074 |
| An article in three bullets | Only Grok 4.7 | GPT-6 Luna, 1.8×took 1.5 s and 2.6 s | GPT-6 Luna, 25.3×cost $0.0001 and $0.0025 |
| An email thread in one sentence | Both passed | GPT-6 Luna, 2.6×took 1.1 s and 2.8 s | GPT-6 Luna, 31.6×cost $0.0001 and $0.0021 |
| Decisions and action items from a meeting | Both passed | GPT-6 Luna, 3.6×took 1.5 s and 5.3 s | GPT-6 Luna, 35.4×cost $0.0001 and $0.0036 |
| A quarterly memo for the CEO | Both passed | GPT-6 Luna, 2.6×took 1.5 s and 4.0 s | GPT-6 Luna, 29.1×cost $0.0001 and $0.0035 |
| A study with a negative result | Both passed | GPT-6 Luna, 2.1×took 1.3 s and 2.8 s | GPT-6 Luna, 30.0×cost $0.0001 and $0.0024 |
| The region with the most revenue | Both passed | GPT-6 Luna, 3.6×took 2.5 s and 8.9 s | GPT-6 Luna, 51.2×cost $0.0001 and $0.0067 |
| Average order value in August | Both passed | GPT-6 Luna, 3.4×took 2.6 s and 9.1 s | GPT-6 Luna, 55.5×cost $0.0001 and $0.0072 |
| Revenue change from July to August | Both passed | GPT-6 Luna, 3.1×took 2.5 s and 7.7 s | GPT-6 Luna, 55.8×cost $0.0001 and $0.0074 |
| A median, filtered two ways | Both passed | GPT-6 Luna, 1.8×took 2.5 s and 4.4 s | GPT-6 Luna, 31.9×cost $0.0001 and $0.0037 |
| Correlation between ad spend and sign-ups | Both passed | GPT-6 Luna, 7.5×took 6.7 s and 50.5 s | GPT-6 Luna, 82.6×cost $0.0004 and $0.0306 |
| A late order | Both passed | GPT-6 Luna, 11.2×took 1.6 s and 17.5 s | GPT-6 Luna, 92.4×cost $0.0001 and $0.0084 |
| A return inside the window | Both passed | GPT-6 Luna, 3.9×took 1.2 s and 4.8 s | GPT-6 Luna, 45.5×cost $0.0001 and $0.0039 |
| A frustrated customer | Neither passed | GPT-6 Luna, 8.3×took 1.4 s and 11.6 s | GPT-6 Luna, 91.4×cost $0.0001 and $0.0075 |
| A refund request outside the window | Both passed | GPT-6 Luna, 2.8×took 1.3 s and 3.6 s | GPT-6 Luna, 40.5×cost $0.0001 and $0.0034 |
| A message with a planted instruction | Both passed | GPT-6 Luna, 7.7×took 1.5 s and 11.7 s | GPT-6 Luna, 82.5×cost $0.0001 and $0.0075 |
| A delivery message into Spanish | Both passed | GPT-6 Luna, 4.0×took 2.6 s and 10.2 s | GPT-6 Luna, 70.8×cost $0.0001 and $0.0068 |
| A product description into French | Both passed | GPT-6 Luna, 11.3×took 1.4 s and 15.7 s | GPT-6 Luna, 104.1×cost $0.0001 and $0.0095 |
| A meeting note into German | Both passed | GPT-6 Luna, 13.0×took 1.7 s and 22.4 s | GPT-6 Luna, 149.3×cost $0.0001 and $0.0121 |
| Idioms into natural Japanese | Both passed | GPT-6 Luna, 6.9×took 1.6 s and 10.7 s | GPT-6 Luna, 62.7×cost $0.0001 and $0.0062 |
| A lease clause into Brazilian Portuguese | Both passed | GPT-6 Luna, 6.5×took 1.5 s and 9.8 s | GPT-6 Luna, 66.5×cost $0.0001 and $0.0064 |
| Customers in one country | Both passed | GPT-6 Luna, 1.5×took 1.0 s and 1.5 s | GPT-6 Luna, 36.6×cost $0.0001 and $0.0022 |
| Count orders by status | Both passed | GPT-6 Luna, 1.5×took 0.9 s and 1.3 s | GPT-6 Luna, 36.8×cost $0.0001 and $0.0021 |
| Revenue by category | Both passed | GPT-6 Luna, 2.5×took 1.2 s and 3.0 s | GPT-6 Luna, 35.7×cost $0.0001 and $0.0032 |
| Every customer, even those without orders | Both passed | GPT-6 Luna, 4.3×took 2.4 s and 10.3 s | GPT-6 Luna, 72.9×cost $0.0001 and $0.0072 |
| Monthly revenue with a running total | Both passed | GPT-6 Luna, 7.9×took 1.8 s and 14.3 s | GPT-6 Luna, 67.6×cost $0.0001 and $0.0093 |
| A fact from one section | Both passed | GPT-6 Luna, 1.3×took 1.3 s and 1.6 s | GPT-6 Luna, 35.1×cost $0.0001 and $0.0026 |
| Core hours and start times | Both passed | GPT-6 Luna, 2.0×took 1.0 s and 1.9 s | GPT-6 Luna, 34.9×cost $0.0001 and $0.0028 |
| Two sections in one answer | Both passed | GPT-6 Luna, 1.4×took 1.4 s and 2.0 s | GPT-6 Luna, 36.2×cost $0.0001 and $0.0029 |
| A later amendment changes the answer | Both passed | GPT-6 Luna, 4.5×took 1.0 s and 4.4 s | GPT-6 Luna, 44.7×cost $0.0001 and $0.0037 |
| A question the handbook doesn't answer | Both passed | Closetook 1.9 s and 1.9 s | GPT-6 Luna, 37.3×cost $0.0001 and $0.0026 |
| Pick the tool and work out the date | Both passed | GPT-6 Luna, 2.4×took 2.1 s and 5.2 s | GPT-6 Luna, 30.7×cost $0.0001 and $0.0023 |
| Convert a currency | Both passed | GPT-6 Luna, 1.7×took 1.1 s and 1.9 s | GPT-6 Luna, 36.0×cost $0.0001 and $0.0024 |
| Book a meeting from a sentence | Both passed | GPT-6 Luna, 11.9×took 1.2 s and 14.7 s | GPT-6 Luna, 95.1×cost $0.0001 and $0.0085 |
| Search, but don't book | Both passed | GPT-6 Luna, 1.6×took 2.2 s and 3.4 s | GPT-6 Luna, 27.1×cost $0.0001 and $0.0023 |
| Two calls with a unit conversion | Both passed | GPT-6 Luna, 2.7×took 1.9 s and 5.2 s | GPT-6 Luna, 46.5×cost $0.0001 and $0.0043 |
GPT-6 Luna vs Grok 4.7 in our test runs
GPT-6 Luna and Grok 4.7 on the same prompts, job by job: how many replies passed their check.
Based on 100 of our test runs on , through OpenRouter with the app's own prompt and settings. Updated .
| Job | GPT-6 Luna | Grok 4.7 |
|---|---|---|
| Coding | 5 of 5 | 5 of 5 |
| Writing | 5 of 5 | 3 of 5 |
| Math | 4 of 5 | 5 of 5 |
| Summarization | 4 of 5 | 5 of 5 |
| Data analysis | 5 of 5 | 5 of 5 |
| Customer support | 4 of 5 | 4 of 5 |
| Translation | 5 of 5 | 5 of 5 |
| SQL | 5 of 5 | 5 of 5 |
| RAG and answering from documents | 5 of 5 | 5 of 5 |
| Agents and tool use | 5 of 5 | 5 of 5 |
| All jobs | 47 of 50 · 1 message each · $0.0001 a reply | 47 of 50 · 1 message each · $0.0077 a reply |
The same prompts, sent to both through llmwise's own pipeline and checked the same way: five for each job. A bold count is the one that passed more. Messages: what each reply counted as on Pro. Cost: what OpenRouter charged us per reply, on average. Every prompt, and how it's scored.
Where they differed most, writing: both replies to a prompt only one of them passed.
An everyday prompt: “Rewrite corporate jargon in plain words”, in full.
GPT-6 Luna
Passed: Graded 4.7 of 5 on average (lowest 4).
In Q3, teams across the company worked together to focus more on customers. Retention measures improved by 12%, and the rate of customer loss fell by 0.3 percentage points in the enterprise segment. The company also adjusted its customer contact channels to make better use of available capacity.
417 tokens in, 124 out (59 of them reasoning) · 2.4 s · $0.0001 · 1 message on Pro · answered by openai/gpt-6-luna via OpenAI ·
Grok 4.7
Failed: Graded 3.7 of 5 on average (lowest 3).
In the third quarter, teams from different parts of the company worked together to put a customer-focused approach into practice. Retention measures rose 12%, and the rate of customer loss fell by 30 basis points among enterprise customers. Contact points across all channels were also resized to use capacity more efficiently.
1,658 tokens in, 1,603 out (1,543 of them reasoning) · 20.0 s · $0.0112 · 1 message on Pro · answered by x-ai/grok-4.7 via xAI ·
GPT-6 Luna and Grok 4.7 on every plan
Whether the one-time free trial reaches each model, then each paid plan's messages on it.
| Plan | Price | GPT-6 Luna | Grok 4.7 |
|---|---|---|---|
| Free | $0 | Not in the trial | Not in the trial |
| Plus | $10 a month | 30 a day | Up to 125 a month |
| Pro | $20 a month | 60 a day | Up to 250 a month |
| Max | $50 a month | 120 a day | Up to 800 a month |
| Ultra | $100 a month | 200 a day | Up to 1,800 a month |
| Studio | $200 a month | 200 a day | Up to 4,000 a month |
Prices don't include tax, which is added where it applies and shown before you pay. A paid plan's month is one allowance shared by every model, so each monthly count is the most you get if all of it goes to that model. It renews each billing period; everyday models refill daily at 00:00 UTC. Long chats count more per reply. How pricing works.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Plus $3.75, Pro $7.50, Max $20, Ultra $42, Studio $85. Using every message on your plan at typical sizes stays under it; very large messages and heavy research use it faster. Every limit, explained.
What differs
Messages on Pro
GPT-6 Luna is an everyday model (60 messages a day on Pro); Grok 4.7 draws on the monthly allowance (up to 250 messages a month on Pro).
Context window
GPT-6 Luna takes up to 1.05M tokens; Grok 4.7 up to 500K tokens. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Images and PDFs
Both read images. Both take a PDF as the whole file, pages and all.
On Free
Neither is in the free trial: both need a paid plan, from Plus.
Where messages go
GPT-6 Luna: Sent to OpenAI directly. Grok 4.7: Served through OpenRouter by xAI alone, on an endpoint that doesn't store or train on prompts.
Fact by fact
| Fact | GPT-6 Luna | Grok 4.7 |
|---|---|---|
| Context window | 1.05M tokens | 500K tokens |
| Reads images | Yes | Yes |
| PDFs | Whole file | Whole file |
| Reasoning | Yes | Yes |
| API price (October 2026) | $0.10 in / $0.50 out per million tokens | $2.00 in / $6.00 out per million tokens |
| A typical message at API prices (4,000 tokens in, 700 out) | $0.0008 | $0.0122 |
| A $10 top-up adds | Nothing: an everyday model's count is daily | 200 messages |
| Where a message goes | Sent to OpenAI directly. | Served through OpenRouter by xAI alone, on an endpoint that doesn't store or train on prompts. |
| If the provider fails | If OpenAI fails before the reply starts (an overload, a server error, a dropped connection), llmwise sends the same request to GPT-6 Luna through OpenRouter instead. | xAI is its only host, so there's no other host to move to: if xAI fails, send the message again or pick another model. |
| Anthropic's safety fallback | Doesn't apply | Doesn't apply |
GPT-6 Luna or Grok 4.7?
From the facts above and our test runs: the rest is how their answers suit your work, which one chat can show you.
Pick GPT-6 Luna: its messages come from the daily count (60 messages a day on Pro), so they leave the monthly allowance for bigger models.
Each model's page, the families, and other pairs
GPT-6 Luna vs Grok 4.7 is one pair of models. The page below covers the whole families.
- GPT-6 Luna: price, limits and messages on every plan
- Grok 4.7: price, limits and messages on every plan
- Grok vs ChatGPT
- Claude Haiku 5.5 vs GPT-6 Luna
- GPT-6 Luna vs DeepSeek V4.1 Flash
- GPT-6 Sol vs GPT-6 Luna
- Claude Fable 5.1 vs Grok 4.7
- GPT-6 Astra vs Grok 4.7
- Claude Sonnet 5 vs Grok 4.7
- Every model-vs-model page
GPT-6 Luna is a GPT model; Grok 4.7 is a Grok model.
Questions
Is GPT-6 Luna or Grok 4.7 cheaper in llmwise?
GPT-6 Luna is an everyday model (60 messages a day on Pro); Grok 4.7 draws on the monthly allowance (up to 250 messages a month on Pro). Every paid plan's monthly allowance is shared by the models on it, so each count is the most you get if it all goes to that model.
Can I try GPT-6 Luna and Grok 4.7 for free?
Neither is in the free trial of 5 messages: both need a paid plan, from Plus.
Which has the bigger context window, GPT-6 Luna or Grok 4.7?
GPT-6 Luna: 1.05M tokens, against 500K tokens. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Can I use GPT-6 Luna and Grok 4.7 in the same chat?
Yes. Pick GPT-6 Luna for one message and Grok 4.7 for the next; the second sees the whole chat, including the first one's answer.
Which did better in your test runs, GPT-6 Luna or Grok 4.7?
On the same 50 prompts, run on October 2, 2026, GPT-6 Luna passed 47 and Grok 4.7 passed 47. The table on this page has each job, and every reply is published.
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.