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Grok 4.7 vs Claude Fable 5.1
Claude Fable 5.1 scores higher than Grok 4.7 on all 3 public leaderboards that rate both. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Grok 4.7 is at 59.6 and Claude Fable 5.1 at 91.7 (out of 100). On each maker's API, Grok 4.7 costs $2 / $6 per 1M tokens (input / output) and Claude Fable 5.1 $10 / $50.
Scores as published by each board; table composed November 8, 2026.
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Leaderboard by leaderboard
| Board | Grok 4.7 | Claude Fable 5.1 | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,638.3 | 1,745.7 | Claude Fable 5.1 |
| LiveBench global average (0-100) | 70.1 | 85.7 | Claude Fable 5.1 |
| Artificial Analysis intelligence index · measured runs only | 35 | 49.7 | Claude Fable 5.1 |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
For coding
On the ArtificialWatch coding index, Grok 4.7 is at 42 (#24 of 45) and Claude Fable 5.1 at 89.4 (#4). Claude Fable 5.1 scores higher on all 3 coding boards that rate both.
| Coding board | Grok 4.7 | Claude Fable 5.1 |
|---|---|---|
| LMArena · Coding | 1,425.3 | 1,529.9 |
| LiveBench · Coding | 84.5 | 97.7 |
| Vals Vibe Code Bench | 86.2 | 90.3 |
Grok 4.7 at a glance
- Developer
- xAI
- Status
- Live since September 21, 2026
- API price
- $2 input / $6 output per 1M tokens · xAI, grok-4.7
- Context window
- 500K tokens
Live — Sep 21 · 500k ctx · $2/$6 per 1M under a 200k prompt, $4/$12 over it, $0.50 cached — unchanged from 4.6 · Artificial Analysis: Intelligence Index 46 (+2), 4th on the Coding Agent Index at 56 with Grok Build, AA-Briefcase 1657 Elo (+111) alongside Opus 5 and Fable 5.1 · burns ~81k output tokens per index task at xhigh, 2.25x Grok 4.6.
Grok 4.7 puts xAI in the top four - and it buys that with three times the tokens
2026-09-21 · xAI shipped Grok 4.7 today. Our radar read the id at 15:49:44 UTC, confirmed it on the next sweep and sent 307 alerts 61 seconds after first sight.
Musk says Grok 4.6 ships next week — on the earnings call where SpaceX stock fell 8%
2026-08-05 · SpaceX held its first public earnings call yesterday. Grok was on the agenda, and the version of it circulating as a bullet list flattens three very different levels of certainty into one. Here they are separated.
Claude Fable 5.1 at a glance
- Developer
- Anthropic
- Status
- Live since September 1, 2026
- API price
- $10 input / $50 output per 1M tokens · Anthropic, claude-fable-5-1
- Context window
- 1M tokens
Live - sticker price held at $10/$50, but cache reads cut 75% to $0.25 = ~25% cheaper typical, up to ~45% agentic · 1M ctx · effort low-max.
Claude Fable 5.1 is live — the sticker price never moved, and the cache read fell 75%
2026-09-01 · Claude Fable 5.1 shipped today, alongside Claude Mythos 5.1. Our radar detected it at 17:52:22 UTC and confirmed it on the next sweep 60 seconds later.
Fable 5.1's August window has closed — the market now prices September at 78%, and one claim in the leak can't be checked at all
2026-08-20 · A claim going round today says Fable 5.1 is in pre-release testing, targeted at September, and running inside Anthropic's own products under the Fable 5 name. One part of that is checkable, one part is checkable and slipping, and one part is — by construction — invisible to anything we can measure.
Grok 4.7 vs Claude Fable 5.1: quick answers
Which is better, Grok 4.7 or Claude Fable 5.1?
It depends on what you measure. Claude Fable 5.1 scores higher than Grok 4.7 on all 3 public leaderboards that rate both. Claude Fable 5.1's widest lead is on LiveBench. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Grok 4.7 is at 59.6 and Claude Fable 5.1 at 91.7 (out of 100).
Which is newer, Grok 4.7 or Claude Fable 5.1?
Grok 4.7. It went live on September 21, 2026, 20 days after Claude Fable 5.1 (September 1, 2026).
Which is cheaper, Grok 4.7 or Claude Fable 5.1?
Grok 4.7 is cheaper on both input and output. On each vendor's own API, Grok 4.7 is $2 input / $6 output per million tokens and Claude Fable 5.1 is $10 input / $50 output per million tokens. Grok 4.7's rate rises for prompts over 200K tokens. Prices as published in the models.dev catalog, as of 2026-11-08.
Which has the bigger context window, Grok 4.7 or Claude Fable 5.1?
Claude Fable 5.1, at 1M tokens against Grok 4.7's 500K, as each vendor lists it.
How do Grok 4.7 and Claude Fable 5.1 compare for coding?
On the ArtificialWatch coding index, Grok 4.7 is at 42 (#24 of 45) and Claude Fable 5.1 at 89.4 (#4). Claude Fable 5.1 scores higher on all 3 coding boards that rate both.
Who makes Grok 4.7 and Claude Fable 5.1?
Grok 4.7 is from xAI; Claude Fable 5.1 is from Anthropic.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed November 8, 2026). Boards measure different things, so raw scores are only comparable within a row.
More comparisons
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