Claude Fable 5.1 vs Grok 4.6
At a Glance
| Compare | Claude Fable 5.1Anthropic | Grok 4.6xAI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v4.4 | #2 of 5799.0 score · 3/3 sources · complete | UnrankedNot in the 57-model eligible cohort |
| CostLower is better · Published-token output estimate | #27 of 27$0.824 per LiveBench case | UnrankedNot in the 27-model eligible cohort |
| EfficiencyHigher is better · MM Efficiency v1.9 | #14 of 2749.5 score · 3/3 sources · complete | UnrankedNot in the 27-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $10.00Anthropic ↗ · Sep 3, 2026 | $2.00Xai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | $50.00Anthropic ↗ · Sep 3, 2026 | $6.00Xai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 1,000K | 500K |
| Model facts checked | Sep 2, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | Claude Fable 5.1 | Grok 4.6 |
|---|---|---|
| ARC-AGI-1verified-v1-613c385b0c93 · verified_score · leader | 97.50100% of row best · percent · Claude Fable 5.1 (Max) | 87.5090% of row best · percent · Grok 4.6 (Medium) |
| ARC-AGI-2verified-v2-be40992860f9 · verified_score · leader | 90.00100% of row best · percent · Claude Fable 5.1 (XHigh) | 67.0875% of row best · percent · Grok 4.6 (XHigh) |
| LMArena Agent Arenaagent-2026-10-16-a64ca3b12b6e · outcome_score · leader | 14.03100% of row best · score · Claude Fable 5.1 (Max); 95% CI [12.03932907, 16.02502568]; sessions 16374; observations 1913479; rank 3 | 0.8988% of row best · score · Grok 4.6 (xHigh); 95% CI [-0.22077562, 2.00905409]; sessions 28868; observations 3315294; rank 28 |
| LMArena Document Arenadocument-2026-09-13-a64ca3b12b6e · arena_rating · leader | 1,512.58100% of row best · rating · claude-fable-5.1-max; 95% CI [1497.40364732, 1527.76498981]; votes 1403; rank 2 | 1,452.3396% of row best · rating · grok-4.6-high; 95% CI [1440.31399734, 1464.34557688]; votes 2258; rank 25 |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e · arena_rating · leader | 1,318.24100% of row best · rating · claude-fable-5.1-max; 95% CI [1308.61778049, 1327.86146111]; votes 4648; rank 4 | 1,263.1496% of row best · rating · grok-4.6-high; 95% CI [1254.48523007, 1271.79468461]; votes 6495; rank 52 |
| LiveBench2026-06-25-90f8d44da965 · overall · leader | 86.82100% of row best · percent · claude-fable-5-1-max-effort · 16,470 output tokens / case | 82.1795% of row best · percent · grok-4.6 · 16,154 output tokens / case |
| ToneBench2026-10-17-10-task-e9c76358afb2 · overall_score · unverified | 84.53100% of row best · points · Claude Fable 5.1 (max effort) · 68,653 output tokens / case | 80.3395% of row best · points · Grok 4.6 (high) · 21,440 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 6 benchmark winsOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | Claude Fable 5.1 | Grok 4.6 |
|---|---|---|
| Developer | Anthropic | xAI |
| Family | Claude 5 1 | Grok 4 |
| Model | Claude Fable 5.1 | Grok 4.6 |
| Version | Claude Fable 5.1 | Grok 4.6 |
| Lifecycle | active | active |
| Released | 2026-09-01 | Unknown |
| Knowledge cutoff | 2026-06-01 | 2026-02-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 500K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard) | Xai (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
Claude Fable 5.1 Capabilities
Grok 4.6 Capabilities
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Primary Evidence
Sources and Freshness
Questions
Claude Fable 5.1 vs Grok 4.6 FAQs
Is Claude Fable 5.1 or Grok 4.6 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Fable 5.1 and Grok 4.6, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Fable 5.1 or Grok 4.6?+
Claude Fable 5.1 is $10.00 and Grok 4.6 is $2.00 per million tokens, so Grok 4.6 is cheaper on this metric. Claude Fable 5.1 is $50.00 and Grok 4.6 is $6.00 per million tokens, so Grok 4.6 is cheaper on this metric.
Which has a larger context window, Claude Fable 5.1 or Grok 4.6?+
Claude Fable 5.1 has the larger sourced context window. Claude Fable 5.1 supports 1,000,000 tokens and Grok 4.6 supports 500,000 tokens.
Which performs better in benchmarks, Claude Fable 5.1 or Grok 4.6?+
Claude Fable 5.1 leads the current overall benchmark count. The result uses 6 protocol-matched benchmarks from 3 publishers; it is not a universal quality score.
Can Claude Fable 5.1 or Grok 4.6 be self-hosted?+
Both models have the same sourced self-hosting status: unsupported. Claude Fable 5.1 is not marked open weight; Grok 4.6 is not marked open weight.
Can Claude Fable 5.1 and Grok 4.6 understand images?+
Claude Fable 5.1 is documented with image input; Grok 4.6 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Fable 5.1 or Grok 4.6?+
Claude Fable 5.1 has a sourced maximum output of 128,000 tokens; Grok 4.6's maximum output is not reported. A larger limit cannot be determined.
Do Claude Fable 5.1 and Grok 4.6 support reasoning and tool use?+
Claude Fable 5.1: reasoning, tool calling, and image input. Grok 4.6: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Fable 5.1 or Grok 4.6?+
Claude Fable 5.1 has 1 sourced provider route; Grok 4.6 has 1, a tie.
Which offers better value, Claude Fable 5.1 or Grok 4.6?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.