Claude model for demanding reasoning and long-horizon agentic work
Claude Fable 5.1 by anthropic is offered by 18 providers on this page. Its official list price is $10.00 per 1M input tokens and $50.00 per 1M output tokens. The lowest paid channel is NanoGPT at $10.00 / $50.00 per 1M, about 1.2× below the list price. That channel is a third-party gateway, so confirm its availability and rate limits before depending on it.
Artificial Analysis rates it 65.7 on the Intelligence Index, with 81.6 for coding and 61.3 for agentic tasks. Against its lowest blended price of $20.00 per 1M, that is roughly 3 index points per dollar, which is the value ratio the leaderboards rank on. Median output speed is 66 tokens per second, with 285.33s to the first token. Running one task of the Artificial Analysis suite costs about $3.6891, which reflects how many tokens its reasoning consumes rather than the unit price alone.
The context window is 1,000,000 tokens, with an output limit of 128,000 tokens. It supports reasoning, tool use, and structured output. Accepted input modalities are Text, Image, and PDF. Its training knowledge cuts off at 2026-06.
Quality is independently evaluated by Artificial Analysis. Speed/latency are model-level medians.
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| NanoGPT anthropic/claude-fable-5.1 | Gateway | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| Vertex claude-fable-5-1@default | First-party | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| OpenRouter anthropic/claude-fable-5.1 | Gateway | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| Vertex (Anthropic) claude-fable-5-1@default | Cloud | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| CrossModel | Gateway | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| AnthropicOfficial | First-party | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| Amazon Bedrock anthropic.claude-fable-5-1 | Cloud | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| Merge Gateway | Gateway | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| Azure Cognitive Services | First-party | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
| OpenCode Zen | Gateway | $10.00 | $50.00 | $0.25 | $12.50 | 1,000,000 | 128,000 | |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Price history accumulates from each data sync; currently only 1 sample(s) (2026-09-02). Each future sync adds a point, and once accumulated a line is drawn here.