Claude Fable 5
The most demanding reasoning and long-horizon agentic work.
What are Claude Fable 5's specs and price?
Claude Fable 5, built by Anthropic, ships a 1M-token context window and a 128K-token max output, released 2026-05. It supports text and vision input with a dedicated reasoning mode and costs $20.00 per million blended tokens, the 32nd-cheapest of 32 models we track.
Specs
| Context window | 1M tokens |
| Max output | 128K tokens |
| Modalities | text, vision |
| Extended thinking | Yes |
| Released | 2026-05 |
| Knowledge cutoff | 2026-02 |
| Provider | Anthropic |
Verified 2026-08-08 — source.
Where it ranks
Strengths
- Most capable widely-released Claude
- 1M-token context
- Extended-thinking mode for hard reasoning
More about Claude Fable 5
FAQ
What is Claude Fable 5's context window?
Claude Fable 5 has a 1M-token context window and a 128K-token max output — the 2nd-largest context of the 32 current models we track. Source: https://docs.anthropic.com/en/docs/about-claude/models, verified 2026-08-08.
Does Claude Fable 5 support vision or audio input?
Yes — Claude Fable 5 accepts vision input in addition to text.
Does Claude Fable 5 have a reasoning or extended-thinking mode?
Yes — Claude Fable 5 exposes a dedicated reasoning mode for multi-step problems.
When was Claude Fable 5 released, and what is its knowledge cutoff?
Claude Fable 5 was released 2026-05 with a knowledge cutoff of 2026-02.
How much does Claude Fable 5 cost, and who provides it?
Claude Fable 5 is served by Anthropic at $20.00/M blended tokens (3:1 input:output) — the 32nd-cheapest of 32 current models. Full pricing breakdown: /llm-api-pricing/claude-fable-5.