Standard & Paid Price
| Meter | Standard Price | Paid Price | Save |
|---|---|---|---|
| Input price | $10.0000 / 1M tokens | $8.0000 / 1M tokens | -20% |
| Completion price | $50.0000 / 1M tokens | $40.0000 / 1M tokens | -20% |
| Cache read price | $0.2500 / 1M tokens | $0.2000 / 1M tokens | -20% |
| Cache creation price | $12.5000 / 1M tokens | $10.0000 / 1M tokens | -20% |
| 1h cache creation price | $20.0000 / 1M tokens | $16.0000 / 1M tokens | -20% |
Description
Anthropic Claude Fable 5.1 — Anthropic’s latest generally available flagship for ambitious, long-running knowledge work and coding. It is built for multi-day agentic tasks, complex software engineering, deep research, document and vision reasoning, and proactive self-verification. Cache reads are priced at 2.5% of input — the lowest of its generation.
Capabilities
- Input modalities
- text, image
- Output modalities
- text
- Tasks
- chat, reasoning, vision, file-video-understanding
Decision evidence
Claude Fable 5.1 is Anthropic's most capable widely released model: closed-weight, released on 2026-09-01, with a 1M-token context window, 128K output tokens and text and image input. Anthropic's model guide starts most workloads on Opus 5.5 and reserves Fable for the highest capability; in the reviewed tests it took 40 minutes and $17 on one front-end prompt, placed last of three models on two real robot tasks, and ranked sixth on AI Coding Daily's coding leaderboard, below Claude Opus 5.5 and GPT-6 Astra.
2026-09-25 · Markdown evidence · JSON data
API endpoints
POST /v1/messages(anthropic)POST /v1/chat/completions(openai)