Claude Fable 5.1 vs Claude Opus 4.6
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Claude Fable 5.1 | Claude Opus 4.6 |
|---|---|---|
| IntelligenceHigher is better · MM Intelligence v1.2 | UnrankedNot in the 22-model eligible cohort | #7 of 2276.2 score |
| CostLower is better · Published-token output estimate | UnrankedNot in the 36-model eligible cohort | #27 of 36$0.241 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.0 | UnrankedNot in the 22-model eligible cohort | #11 of 2252.1 score |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
| Benchmark | Claude Fable 5.1 | Claude Opus 4.6 |
|---|---|---|
| ARC-AGI-1verified-v1-2aa739d957fc · verified_score · leader | 97.50100% of row best · percent · Claude Fable 5.1 (Max) | 94.0096% of row best · percent · Claude Opus 4.6 (120K, High) |
| ARC-AGI-2verified-v2-b5cb5ec6e8c7 · verified_score · leader | 90.00100% of row best · percent · Claude Fable 5.1 (XHigh) | 69.1777% of row best · percent · Claude Opus 4.6 (120K, High) |
| Overall ResultCounted from the protocol-matched rows above | 2 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.
Technical Differences
Side-by-Side Facts
| Field | Claude Fable 5.1 | Claude Opus 4.6 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Family | Claude 5 1 | Claude 4 |
| Model | Claude Fable 5.1 | Claude Opus 4.6 |
| Version | Claude Fable 5.1 | Claude Opus 4.6 |
| Lifecycle | active | active |
| Released | 2026-09-01 | 2026-02-05 |
| Knowledge cutoff | 2026-06-01 | 2025-05-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 1,000K |
| 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) | Anthropic (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, structured_outputs, tools |
15 comparable fields · 6 material differences · Pair passes the primary-source comparison gate
Claude Fable 5.1 Capabilities
Claude Opus 4.6 Capabilities
Internal Comparison Graph
Related Comparisons
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|---|---|---|---|
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Claude Fable 5.1Anthropic | vs |  Kimi-K3Moonshot AI | cross-developer peersimage, text |
 MiniMax-M3MiniMax | vs | Claude Fable 5.1Anthropic | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Claude Fable 5.1Anthropic | vs |  Hy4 previewTencent | cross-developer peerstext |
Claude Fable 5.1Anthropic | vs | Seed 2.1 ProByteDance Seed | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs |  Mistral Large 3Mistral AI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Fable 5.1 vs Claude Opus 4.6 FAQs
Is Claude Fable 5.1 or Claude Opus 4.6 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Fable 5.1 and Claude Opus 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 Claude Opus 4.6?+
Claude Fable 5.1 is $10.00 and Claude Opus 4.6 is $5.00 per million tokens, so Claude Opus 4.6 is cheaper on this metric. Claude Fable 5.1 is $50.00 and Claude Opus 4.6 is $25.00 per million tokens, so Claude Opus 4.6 is cheaper on this metric.
Which has a larger context window, Claude Fable 5.1 or Claude Opus 4.6?+
Neither model has a larger sourced context window in this comparison. Claude Fable 5.1 is 1,000K and Claude Opus 4.6 is 1,000K.
Which performs better in benchmarks, Claude Fable 5.1 or Claude Opus 4.6?+
There is no overall benchmark winner: An overall winner requires at least two decisive benchmarks from at least two original publishers.
Can Claude Fable 5.1 or Claude Opus 4.6 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Fable 5.1 is not marked open weight; Claude Opus 4.6 is not marked open weight.
Can Claude Fable 5.1 and Claude Opus 4.6 understand images?+
Claude Fable 5.1 is documented with image input; Claude Opus 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 Claude Opus 4.6?+
Neither has a larger sourced maximum output. Claude Fable 5.1 is 128K and Claude Opus 4.6 is 128K.
Do Claude Fable 5.1 and Claude Opus 4.6 support reasoning and tool use?+
Claude Fable 5.1: reasoning, tool calling, and image input. Claude Opus 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 Claude Opus 4.6?+
Claude Fable 5.1 has 1 sourced provider route; Claude Opus 4.6 has 1, a tie.
Which offers better value, Claude Fable 5.1 or Claude Opus 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.