Claude Fable 5.1 vs Grok 4.7
Claude Fable 5.1 scores higher on the Models at Work leaderboard (80 vs 58 out of 100). Grok 4.7 is about 5.3× cheaper per blended million tokens ($3.74 vs $20, one figure an Artificial Analysis estimate). On Artificial Analysis' independent Intelligence Index, Claude Fable 5.1 leads 53 to 46.
| Claude Fable 5.1 · Anthropic | Grok 4.7 · xAI | |
|---|---|---|
| Leaderboard rank | #6 | #12 |
| Score (0–100) | 80 | 58 |
| Tier | Frontier | Workhorse |
| Price per 1M tokens | $10 in · $50 out | $3.74 blended (estimate) |
| Context window | 1M | 500K |
| Open weights | No | No |
| Artificial Analysis Intelligence Index | 53 | 46 |
| Arena text score | 1501 | — |
| Humanity's Last Exam, Diamond (Scale) | 51.3 | — |
| Best for | Long-horizon agents, Problems Opus fails on, Demanding reasoning | X-integrated products |
Choose Claude Fable 5.1 if…
- you need long-horizon agents
- you need problems opus fails on
- you need demanding reasoning
The specialist: Anthropic's own docs say to reach for it when Opus 5.5 at high effort still falls short, and the price says the same.
Caveats: Ten dollars per million input is the highest in this table alongside Astra.
Choose Grok 4.7 if…
- you need x-integrated products
Mid-table on the index at a frontier price, with a smaller context window than everyone above it.
Caveats: 500K context is the smallest in the table. Listed by Artificial Analysis under the creator's current corporate name.
Questions people ask
Which is better, Claude Fable 5.1 or Grok 4.7?
Claude Fable 5.1 scores higher on the Models at Work leaderboard (80 vs 58 out of 100). Grok 4.7 is about 5.3× cheaper per blended million tokens ($3.74 vs $20, one figure an Artificial Analysis estimate). On Artificial Analysis' independent Intelligence Index, Claude Fable 5.1 leads 53 to 46.
When should I choose Claude Fable 5.1 over Grok 4.7?
Choose Claude Fable 5.1 for long-horizon agents, problems opus fails on, demanding reasoning. The specialist: Anthropic's own docs say to reach for it when Opus 5.5 at high effort still falls short, and the price says the same.
When should I choose Grok 4.7 over Claude Fable 5.1?
Choose Grok 4.7 for x-integrated products. Mid-table on the index at a frontier price, with a smaller context window than everyone above it.
Which is cheaper, Claude Fable 5.1 or Grok 4.7?
Claude Fable 5.1 costs $10 per million input tokens and $50 per million output tokens on Anthropic's list price (Claude pricing, read Oct 10, 2026). xAI does not publish a simple list price for Grok 4.7; Artificial Analysis estimates a blended $3.74 per million tokens (three input to one output).
Scores come from the Models at Work leaderboard: Score is 0 to 100: 50% independent evals normalised within this table, 20% price-performance, 15% practitioner sentiment from Signals and community threads, 15% operational fit (context, speed, availability, open weights). Models within three points are a tie in practice. Vendor-published figures are labelled as such and never counted as independent. Prices are vendor list prices where published; blended figures assume three input tokens per output token.