Model vs model
Claude Fable 5.1 vs Grok 4.7
Claude Fable 5.1 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 Claude Fable 5.1 page, OpenRouter's Grok 4.7 page. Updated .
Short answer
Grok 4.7 gets eight times as many messages: up to 250 messages a month on Pro, against up to 31 messages a month for Claude Fable 5.1. Otherwise, only Claude Fable 5.1 can be passed to another model by its maker's safety system. In our test runs, Claude Fable 5.1 passed 45 of the 50 prompts both answered and Grok 4.7 47; 6 prompts split them, most on summarization (3 to 5).
Claude Fable 5.1 vs Grok 4.7, prompt by prompt
Every prompt Claude Fable 5.1 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 43, only Claude Fable 5.1 passed 2, only Grok 4.7 passed 4, and neither passed 1. Claude Fable 5.1 answered sooner on 29 of the 50 and Grok 4.7 on 18; the rest were within 10% of each other. The 50 replies cost $1.0018 on Claude Fable 5.1 and $0.3875 on Grok 4.7: 2.6× less on Grok 4.7.
The 6 prompts only one of Claude Fable 5.1 and Grok 4.7 passed
Rewrite corporate jargon in plain words (writing): Claude Fable 5.1 passed and Grok 4.7 didn't. Claude Fable 5.1: Graded 4.3 of 5 on average (lowest 4). Grok 4.7: Graded 3.7 of 5 on average (lowest 3).
A product announcement with five rules (writing): Grok 4.7 passed and Claude Fable 5.1 didn't. Claude Fable 5.1: Graded 3.7 of 5 on average (lowest 3). Grok 4.7: Graded 4.0 of 5 on average (lowest 3).
An article in three bullets (summarization): Grok 4.7 passed and Claude Fable 5.1 didn't. Claude Fable 5.1: Graded 4.3 of 5 on average (lowest 4); but 62 words, over the 60 allowed. Grok 4.7: Graded 4.7 of 5 on average (lowest 4).
An email thread in one sentence (summarization): Grok 4.7 passed and Claude Fable 5.1 didn't. Claude Fable 5.1: Graded 5.0 of 5 on average (lowest 5); but 33 words, over the 30 allowed. Grok 4.7: Graded 4.7 of 5 on average (lowest 4).
A frustrated customer (customer support): Claude Fable 5.1 passed and Grok 4.7 didn't. Claude Fable 5.1: Graded 4.7 of 5 on average (lowest 4). Grok 4.7: Graded 3.7 of 5 on average (lowest 3).
A message with a planted instruction (customer support): Grok 4.7 passed and Claude Fable 5.1 didn't. Claude Fable 5.1: Graded 4.7 of 5 on average (lowest 4); but 159 words, over the 150 allowed. Grok 4.7: Graded 4.7 of 5 on average (lowest 4).
Job by job, the widest gaps first
Summarization: Claude Fable 5.1 passed 3 of 5 and Grok 4.7 5 of 5. Grok 4.7 answered 1.8× sooner at the median, 5.0 s against 2.8 s. Grok 4.7 cost 5.7× less, $0.0805 against $0.0141 for the 5 replies. Claude Fable 5.1's replies ran 78% longer, in tokens of reply, thinking not counted.
RAG and answering from documents: Claude Fable 5.1 passed 5 of 5 and Grok 4.7 5 of 5. Grok 4.7 answered 2.1× sooner at the median, 4.0 s against 1.9 s. Grok 4.7 cost 5.0× less, $0.0727 against $0.0146 for the 5 replies. Claude Fable 5.1's replies ran 237% longer, in tokens of reply, thinking not counted.
SQL: Claude Fable 5.1 passed 5 of 5 and Grok 4.7 5 of 5. Grok 4.7 answered 1.5× sooner at the median, 4.5 s against 3.0 s. Grok 4.7 cost 3.8× less, $0.0924 against $0.0240 for the 5 replies. Claude Fable 5.1's replies ran 133% longer, in tokens of reply, thinking not counted.
Customer support: Claude Fable 5.1 passed 4 of 5 and Grok 4.7 4 of 5. Claude Fable 5.1 answered 1.9× sooner at the median, 6.1 s against 11.6 s. Grok 4.7 cost 3.6× less, $0.1103 against $0.0306 for the 5 replies. Claude Fable 5.1's replies ran 118% longer, in tokens of reply, thinking not counted.
Agents and tool use: Claude Fable 5.1 passed 5 of 5 and Grok 4.7 5 of 5. Claude Fable 5.1 answered 1.5× sooner at the median, 3.5 s against 5.2 s. Grok 4.7 cost 3.0× less, $0.0598 against $0.0197 for the 5 replies. Claude Fable 5.1's replies ran 66% longer, in tokens of reply, thinking not counted.
Writing: Claude Fable 5.1 passed 3 of 5 and Grok 4.7 3 of 5. Their median waits were close, 6.0 s against 6.0 s. Grok 4.7 cost 3.0× less, $0.0862 against $0.0288 for the 5 replies. Claude Fable 5.1's replies ran 96% longer, in tokens of reply, thinking not counted.
Data analysis: Claude Fable 5.1 passed 5 of 5 and Grok 4.7 5 of 5. Claude Fable 5.1 answered 1.8× sooner at the median, 4.9 s against 8.9 s. Grok 4.7 cost 2.5× less, $0.1415 against $0.0556 for the 5 replies. Claude Fable 5.1's replies ran 50% longer, in tokens of reply, thinking not counted.
Translation: Claude Fable 5.1 passed 5 of 5 and Grok 4.7 5 of 5. Claude Fable 5.1 answered 2.1× sooner at the median, 5.1 s against 10.7 s. Grok 4.7 cost 2.1× less, $0.0877 against $0.0410 for the 5 replies. Claude Fable 5.1's replies ran 122% longer, in tokens of reply, thinking not counted.
Coding: Claude Fable 5.1 passed 5 of 5 and Grok 4.7 5 of 5. Claude Fable 5.1 answered 5.7× sooner at the median, 5.5 s against 31.6 s. Grok 4.7 cost 1.7× less, $0.2126 against $0.1229 for the 5 replies. Claude Fable 5.1's replies ran 109% longer, in tokens of reply, thinking not counted.
Math: Claude Fable 5.1 passed 5 of 5 and Grok 4.7 5 of 5. Claude Fable 5.1 answered 2.5× sooner at the median, 4.6 s against 11.7 s. Grok 4.7 cost 1.6× less, $0.0582 against $0.0362 for the 5 replies. Their replies ran to about the same length.
All 50 prompts: who passed, who answered sooner, who cost less
| Prompt | Result | Sooner | Cheaper |
|---|---|---|---|
| Turn a title into a URL slug | Both passed | Claude Fable 5.1, 2.6×took 5.5 s and 14.3 s | Grok 4.7, 2.2×cost $0.0167 and $0.0078 |
| Parse a duration like “1h 30m” | Both passed | Claude Fable 5.1, 6.7×took 4.7 s and 31.6 s | Closecost $0.0173 and $0.0167 |
| Merge overlapping intervals | Both passed | Claude Fable 5.1, 1.2×took 5.3 s and 6.1 s | Grok 4.7, 4.7×cost $0.0214 and $0.0045 |
| Evaluate an arithmetic expression, no eval | Both passed | Claude Fable 5.1, 7.0×took 15.7 s and 110.1 s | Grok 4.7, 1.5×cost $0.0874 and $0.0574 |
| Parse CSV with quoted fields | Both passed | Claude Fable 5.1, 5.0×took 14.3 s and 72.2 s | Grok 4.7, 1.9×cost $0.0697 and $0.0364 |
| Announce a second bakery shop on LinkedIn | Both passed | Claude Fable 5.1, 2.2×took 7.3 s and 16.1 s | Grok 4.7, 2.0×cost $0.0184 and $0.0093 |
| Rewrite corporate jargon in plain words | Only Claude Fable 5.1 | Claude Fable 5.1, 3.3×took 6.0 s and 20.0 s | Grok 4.7, 1.2×cost $0.0130 and $0.0112 |
| Decline a meeting and offer two times | Both passed | Grok 4.7, 1.9×took 4.7 s and 2.5 s | Grok 4.7, 6.1×cost $0.0145 and $0.0024 |
| A product announcement with five rules | Only Grok 4.7 | Grok 4.7, 2.4×took 5.9 s and 2.5 s | Grok 4.7, 6.3×cost $0.0157 and $0.0025 |
| Argue both sides of free buses | Neither passed | Grok 4.7, 1.6×took 9.3 s and 6.0 s | Grok 4.7, 7.3×cost $0.0246 and $0.0034 |
| A discount, then sales tax | Both passed | Claude Fable 5.1, 1.3×took 3.6 s and 4.8 s | Grok 4.7, 2.6×cost $0.0086 and $0.0033 |
| Pens at 3 for $4 | Both passed | Claude Fable 5.1, 3.4×took 5.4 s and 18.5 s | Grok 4.7, 1.4×cost $0.0159 and $0.0111 |
| Compound interest over three years | Both passed | Claude Fable 5.1, 2.2×took 3.6 s and 8.0 s | Grok 4.7, 1.8×cost $0.0092 and $0.0051 |
| Four-digit numbers whose digits sum to 9 | Both passed | Claude Fable 5.1, 3.2×took 4.6 s and 15.1 s | Grok 4.7, 1.5×cost $0.0139 and $0.0093 |
| The highest of three dice is a 5 | Both passed | Claude Fable 5.1, 2.0×took 5.9 s and 11.7 s | Grok 4.7, 1.4×cost $0.0106 and $0.0074 |
| An article in three bullets | Only Grok 4.7 | Grok 4.7, 1.9×took 5.1 s and 2.6 s | Grok 4.7, 6.6×cost $0.0164 and $0.0025 |
| An email thread in one sentence | Only Grok 4.7 | Claude Fable 5.1, 1.1×took 2.5 s and 2.8 s | Grok 4.7, 5.4×cost $0.0114 and $0.0021 |
| Decisions and action items from a meeting | Both passed | Closetook 5.6 s and 5.3 s | Grok 4.7, 5.0×cost $0.0182 and $0.0036 |
| A quarterly memo for the CEO | Both passed | Grok 4.7, 1.2×took 5.0 s and 4.0 s | Grok 4.7, 5.2×cost $0.0184 and $0.0035 |
| A study with a negative result | Both passed | Grok 4.7, 1.8×took 4.9 s and 2.8 s | Grok 4.7, 6.7×cost $0.0160 and $0.0024 |
| The region with the most revenue | Both passed | Claude Fable 5.1, 2.2×took 4.1 s and 8.9 s | Grok 4.7, 2.4×cost $0.0159 and $0.0067 |
| Average order value in August | Both passed | Claude Fable 5.1, 2.7×took 3.3 s and 9.1 s | Grok 4.7, 2.9×cost $0.0209 and $0.0072 |
| Revenue change from July to August | Both passed | Claude Fable 5.1, 1.6×took 4.9 s and 7.7 s | Grok 4.7, 3.1×cost $0.0232 and $0.0074 |
| A median, filtered two ways | Both passed | Grok 4.7, 1.5×took 6.7 s and 4.4 s | Grok 4.7, 4.1×cost $0.0151 and $0.0037 |
| Correlation between ad spend and sign-ups | Both passed | Claude Fable 5.1, 3.6×took 14.2 s and 50.5 s | Grok 4.7, 2.2×cost $0.0663 and $0.0306 |
| A late order | Both passed | Claude Fable 5.1, 2.9×took 6.1 s and 17.5 s | Grok 4.7, 2.4×cost $0.0199 and $0.0084 |
| A return inside the window | Both passed | Closetook 4.9 s and 4.8 s | Grok 4.7, 4.6×cost $0.0178 and $0.0039 |
| A frustrated customer | Only Claude Fable 5.1 | Claude Fable 5.1, 1.6×took 7.0 s and 11.6 s | Grok 4.7, 3.0×cost $0.0223 and $0.0075 |
| A refund request outside the window | Both passed | Grok 4.7, 1.2×took 4.5 s and 3.6 s | Grok 4.7, 6.1×cost $0.0204 and $0.0034 |
| A message with a planted instruction | Only Grok 4.7 | Claude Fable 5.1, 1.6×took 7.2 s and 11.7 s | Grok 4.7, 4.0×cost $0.0299 and $0.0075 |
| A delivery message into Spanish | Both passed | Claude Fable 5.1, 2.4×took 4.2 s and 10.2 s | Grok 4.7, 2.3×cost $0.0158 and $0.0068 |
| A product description into French | Both passed | Claude Fable 5.1, 3.1×took 5.1 s and 15.7 s | Grok 4.7, 1.7×cost $0.0158 and $0.0095 |
| A meeting note into German | Both passed | Claude Fable 5.1, 4.7×took 4.7 s and 22.4 s | Grok 4.7, 1.3×cost $0.0152 and $0.0121 |
| Idioms into natural Japanese | Both passed | Claude Fable 5.1, 1.3×took 8.5 s and 10.7 s | Grok 4.7, 3.5×cost $0.0217 and $0.0062 |
| A lease clause into Brazilian Portuguese | Both passed | Claude Fable 5.1, 1.7×took 5.6 s and 9.8 s | Grok 4.7, 3.0×cost $0.0192 and $0.0064 |
| Customers in one country | Both passed | Grok 4.7, 2.1×took 3.2 s and 1.5 s | Grok 4.7, 5.4×cost $0.0120 and $0.0022 |
| Count orders by status | Both passed | Grok 4.7, 2.7×took 3.5 s and 1.3 s | Grok 4.7, 5.7×cost $0.0122 and $0.0021 |
| Revenue by category | Both passed | Grok 4.7, 1.5×took 4.5 s and 3.0 s | Grok 4.7, 5.9×cost $0.0190 and $0.0032 |
| Every customer, even those without orders | Both passed | Claude Fable 5.1, 2.0×took 5.2 s and 10.3 s | Grok 4.7, 2.8×cost $0.0199 and $0.0072 |
| Monthly revenue with a running total | Both passed | Claude Fable 5.1, 2.3×took 6.3 s and 14.3 s | Grok 4.7, 3.1×cost $0.0293 and $0.0093 |
| A fact from one section | Both passed | Grok 4.7, 2.2×took 3.5 s and 1.6 s | Grok 4.7, 5.2×cost $0.0134 and $0.0026 |
| Core hours and start times | Both passed | Grok 4.7, 1.9×took 3.7 s and 1.9 s | Grok 4.7, 4.8×cost $0.0135 and $0.0028 |
| Two sections in one answer | Both passed | Grok 4.7, 3.2×took 6.3 s and 2.0 s | Grok 4.7, 4.6×cost $0.0133 and $0.0029 |
| A later amendment changes the answer | Both passed | Grok 4.7, 1.6×took 7.1 s and 4.4 s | Grok 4.7, 4.5×cost $0.0165 and $0.0037 |
| A question the handbook doesn't answer | Both passed | Grok 4.7, 2.2×took 4.0 s and 1.9 s | Grok 4.7, 6.1×cost $0.0160 and $0.0026 |
| Pick the tool and work out the date | Both passed | Claude Fable 5.1, 1.6×took 3.3 s and 5.2 s | Grok 4.7, 4.5×cost $0.0102 and $0.0023 |
| Convert a currency | Both passed | Grok 4.7, 1.8×took 3.5 s and 1.9 s | Grok 4.7, 4.4×cost $0.0103 and $0.0024 |
| Book a meeting from a sentence | Both passed | Claude Fable 5.1, 5.8×took 2.5 s and 14.7 s | Grok 4.7, 1.5×cost $0.0131 and $0.0085 |
| Search, but don't book | Both passed | Grok 4.7, 1.5×took 5.0 s and 3.4 s | Grok 4.7, 5.1×cost $0.0116 and $0.0023 |
| Two calls with a unit conversion | Both passed | Closetook 4.8 s and 5.2 s | Grok 4.7, 3.4×cost $0.0145 and $0.0043 |
Claude Fable 5.1 vs Grok 4.7 in our test runs
Claude Fable 5.1 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 | Claude Fable 5.1 | Grok 4.7 |
|---|---|---|
| Coding | 5 of 5 | 5 of 5 |
| Writing | 3 of 5 | 3 of 5 |
| Math | 5 of 5 | 5 of 5 |
| Summarization | 3 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 | 45 of 50 · 1 message each · $0.0200 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, summarization: both replies to a prompt only one of them passed.
An everyday prompt: “An article in three bullets”, in full.
Claude Fable 5.1
Failed: Graded 4.3 of 5 on average (lowest 4); but 62 words, over the 60 allowed.
- Aldmoor's six-month protected bike lane trial on Market Street ended; council votes in November on making it permanent. - Daily bike trips rose from 900 to 2,300, car traffic fell 14%, rush-hour driver times rose about a minute, and cyclist injuries dropped from nine to two. - Businesses were split (27 gained customers, 19 lost); permanence would cost €1.1 million beyond the €410,000 installation.
727 tokens in, 150 out · 5.1 s · $0.0164 · 1 message on Pro · answered by anthropic/claude-fable-5.1 via Anthropic ·
Grok 4.7
Passed: Graded 4.7 of 5 on average (lowest 4).
- Aldmoor’s six-month Market Street bike-lane trial ends; the council votes in November on making them permanent. - Daily bike trips rose from about 900 to 2,300; car traffic fell 14%, with rush-hour delays of just over a minute. - Businesses were split; cyclist injuries fell from nine to two; permanence would add €1.1 million to the €410,000 install cost.
1,759 tokens in, 115 out (25 of them reasoning) · 2.6 s · $0.0025 · 1 message on Pro · answered by x-ai/grok-4.7 via xAI ·
Claude Fable 5.1 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 | Claude Fable 5.1 | Grok 4.7 |
|---|---|---|---|
| Free | $0 | Not in the trial | Not in the trial |
| Plus | $10 a month | Not on Plus | Up to 125 a month |
| Pro | $20 a month | Up to 31 a month | Up to 250 a month |
| Max | $50 a month | Up to 100 a month | Up to 800 a month |
| Ultra | $100 a month | Up to 225 a month | Up to 1,800 a month |
| Studio | $200 a month | Up to 500 a month | 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
Grok 4.7 gets eight times as many messages: up to 250 messages a month on Pro, against up to 31 messages a month for Claude Fable 5.1.
Context window
Claude Fable 5.1 takes up to 1M 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: Claude Fable 5.1 needs Pro or a higher plan and Grok 4.7 needs a paid plan.
Where messages go
Claude Fable 5.1: Sent to Anthropic 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 | Claude Fable 5.1 | Grok 4.7 |
|---|---|---|
| Context window | 1M tokens | 500K tokens |
| Reads images | Yes | Yes |
| PDFs | Whole file | Whole file |
| Reasoning | Yes | Yes |
| API price (October 2026) | $10.00 in / $50.00 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) | $0.0750 | $0.0122 |
| A $10 top-up adds | 25 messages | 200 messages |
| Where a message goes | Sent to Anthropic directly. | Served through OpenRouter by xAI alone, on an endpoint that doesn't store or train on prompts. |
| If the provider fails | If Anthropic fails before the reply starts (an overload, a server error, a dropped connection), llmwise sends the same request to Claude Fable 5.1 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 | Anthropic's safety system can pass a Claude Fable 5.1 message to another Claude model. The reply then names the model that answered and says what you were charged for. | Doesn't apply |
Claude Fable 5.1 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 Grok 4.7: more messages for the money, up to 250 messages a month on Pro.
Each model's page, the families, and other pairs
Claude Fable 5.1 vs Grok 4.7 is one pair of models. The page below covers the whole families.
- Claude Fable 5.1: price, limits and messages on every plan
- Grok 4.7: price, limits and messages on every plan
- Grok vs Claude
- Claude Fable 5.1 vs GPT-6 Astra
- Claude Fable 5.1 vs Claude Opus 5.5
- Claude Fable 5.1 vs Kimi K3
- GPT-6 Astra vs Grok 4.7
- Claude Sonnet 5 vs Grok 4.7
- Claude Haiku 4.5 vs Grok 4.7
- Every model-vs-model page
Claude Fable 5.1 is a Claude model; Grok 4.7 is a Grok model.
Questions
Is Claude Fable 5.1 or Grok 4.7 cheaper in llmwise?
Grok 4.7 gets eight times as many messages: up to 250 messages a month on Pro, against up to 31 messages a month for Claude Fable 5.1. 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 Claude Fable 5.1 and Grok 4.7 for free?
Neither is in the free trial of 5 messages: Claude Fable 5.1 needs Pro or a higher plan and Grok 4.7 needs a paid plan.
Which has the bigger context window, Claude Fable 5.1 or Grok 4.7?
Claude Fable 5.1: 1M 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 Claude Fable 5.1 and Grok 4.7 in the same chat?
Yes. Pick Claude Fable 5.1 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, Claude Fable 5.1 or Grok 4.7?
On the same 50 prompts, run on October 2, 2026, Claude Fable 5.1 passed 45 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.