Claude Fable 5.1
AnthropicReleased Sep 1, 2026Closed weightsclaude-fable-5-1
- Intelligence (Epoch)
- 166 · 4th of 111
- Knowledge cutoff
- June 2026
- Context
- 1M tokens
- Max output
- 128K tokens
- Input
- text, image
- Anthropic's API
- yes, as claude-fable-5-1
Read Sep 4, 18:00 UTC from the hosts' published offers and OpenRouter, spec sheet from Anthropic · cutoff: platform.claude.com
Intelligence for the price
3 models score higher for the same price or less; it ranks 4 of the 110 models at its price or below.
Epoch Capabilities Index against the lowest input + output price per M, log scale · prices Sep 4. Score: Epoch AI, CC BY 4.0, 166 with an interval of 163 to 171.
Against its rivals
The best of its price range and the top score
- Claude Fable 5.1this model$60.00166
- Claude Opus 5.5top score$24.00169
- GPT-6 Astrasame price range$60.00169
- Claude Opus 5same price range$30.00164
Same level for 5× less: GPT-6 Sol at OpenAI, $12.00 per M input + output · their Epoch intervals overlap (164 against 166).
Bars: Epoch Capabilities Index (Epoch AI, CC BY 4.0), drawn from 100, below the lowest score in the catalogue · price: lowest input + output per M.
| Provider | Input | Output | Cache ↑ | Checked |
|---|---|---|---|---|
| Anthropic | $10.00 | $50.00 | $0.25 | Sep 4 |
| Amazon Bedrock | $10.00 | $50.00 | $0.25 | Sep 4 |
| $10.00 | $50.00 | $0.25 | Sep 4 |
3 of 3 providers · prices per million tokens, read Sep 4, 18:00 UTC
| Provider | Weights | Context | Max output | Tools | Structured outputs | Reasoning |
|---|---|---|---|---|---|---|
| Anthropic | — | 1M | 125K | — | — | — |
| Amazon Bedrock | — | 1M | 125K | — | — | — |
| — | 1M | 125K | — | — | — |
As served by each host and declared to OpenRouter; not verified by us · weights: the precision the host declares
Claude Fable 5.1 spec sheet, field by field, with sources
Claude Fable 5.1 spec sheetmaker-declared
What Anthropic declares about the model itself — read from its own weights repository and documentation, not from any host. What each endpoint actually serves is in the pricing above: the two can differ, and both are true.
- Context window
- 1,000,000 tokens
- Parameters
- not published by the maker
- Active experts
- not published by the maker
- Weight precision
- not applicable — no weights publishedcurated
- License
- Proprietary — API onlycuratedScope: the licence on the published weights, and nothing else. It is not the maker's acceptable-use policy, which is a separate document, and it is not the contract you sign with whichever host you call — hosts set their own terms, which this index does not read.
- Knowledge cutoff
- June 2026
- Modalities
- text · image → text
- Max output (official)
- 128,000 tokens
- Release date
- September 1, 2026
- Maker lifecycle status
- Active (latest)
platform.claude.com · maker's documentation · read 2026-09-19 · 7 of 10 fields published by the maker
| Provider | Chatbot 1,000 in / 500 out | RAG / long context 8,000 in / 500 out | Batch summarize 4,000 in / 1,000 out |
|---|---|---|---|
| Anthropic | $35.00 | $105.00 | $90.00 |
| Amazon Bedrock | $35.00 | $105.00 | $90.00 |
| $35.00 | $105.00 | $90.00 |
What each host bills for 1,000 requests of a representative job
Your own workload
Other Anthropic models · all its models, hosts and history ›
- Claude Fable 53 providers · from $60.00
- Claude Opus 53 providers · from $30.00
- Claude Sonnet 53 providers · from $12.00
- Claude Haiku 4.51 provider · from $6.00
- Claude Haiku 5.51 provider · from $0.60
- Claude Opus 4.11 provider · from $90.00