The Orchestrator › Models › Anthropic
Anthropic: Claude Fable 5.1
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...
Specifications
| Provider | Anthropic |
| Model ID | anthropic/claude-fable-5.1 |
| Context window | 1M tokens (1,000,000) |
| Modalities | text + image + file → text |
| Tokenizer | Claude |
| Router sources | OpenRouter, TrustedRouter, Vercel AI Gateway, Cloudflare |
| Released | 2026-09-01 |
| Tracked since | 2026-11-14 |
| Popularity | #9 by usage · peak 14.4% spend share in an OpenRouter category |
| Reasoning | Mandatory |
Pricing (per million tokens)
| Variant | Source | API ID | Input | Output | Context |
|---|---|---|---|---|---|
| standard | OpenRouter | anthropic/claude-fable-5.1 | $10.00 | $50.00 | 1M |
| batch | OpenRouter | anthropic/claude-fable-5.1:batch | $5.00 | $25.00 | 1M |
| standard | TrustedRouter | anthropic/claude-fable-5.1 | $10.55 | $52.75 | 1M |
| standard | Vercel AI Gateway | anthropic/claude-fable-5.1 | $10.00 | $50.00 | 1M |
| batch | Vercel AI Gateway | anthropic/claude-fable-5.1:batch | $5.00 | $25.00 | 1M |
| standard | Cloudflare | anthropic/claude-fable-5.1 | $10.00 | $50.00 | — |
Recorded price history
| Date | Input / 1M | Output / 1M | Context |
|---|---|---|---|
| 2026-11-14 | $10.00 | $50.00 | — |
| 2026-11-14 | $10.00 | $50.00 | 1M |
| 2026-11-14 | $10.55 | $52.75 | 1M |
| 2026-11-14 | $10.00 | $50.00 | 1M |
Capabilities
Vision (image input)File inputAgentic tool useStructured outputsReasoning (always on)1M+ context windowControllable reasoningNo content storage (attested)No training on inputs (attested)
Trust flags come from TrustedRouter's per-provider attestations.
Supported parameters
include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, stop, structured_outputs, tool_choice, tools, verbosity