Claude Fable 5

[reasoning]

Anthropic[text]

Newest Claude flagship with 1M context and frontier agentic reasoning

Input

$10

per 1M tokens

Output

$50

per 1M tokens

Cached

per 1M tokens

Context

1M tokens

Max Output

128K tokens

Released

2026-06-09

Features

[optional-reasoning][1m-tokens-context][frontier-reasoning][long-horizon-agentic-tasks][vision-input][prompt-caching-90%-discount]

Technical Specifications

Benchmarks

FrontierCode Diamond29.3%

GDPval-AA1932

GPQA Diamond92.6%

Humanity's Last Exam59.0%

SWE-bench Pro80.3%

SWE-bench Verified95.0%

The Lab

location: San Francisco, California, USAfounded: 2021backed by: Amazon, Google; public benefit corporation

Founded in 2021 by former OpenAI researchers and headquartered in San Francisco, Anthropic is a public benefit corporation backed by Amazon and Google. The lab pursues safety-first AI research using Constitutional AI to align models with human values. Its flagship Claude family emphasises long-context understanding, nuanced instruction-following, and steerable behaviour.

more about Anthropic →

Model ID: claude-fable-5