Claude Opus 4.8

[reasoning]

Anthropic[text]

Most capable Claude with 1M context and fast mode

Input

per 1M tokens

Output

$25

per 1M tokens

Cached

$0.50

per 1M tokens

Context

1M tokens

Max Output

64K tokens

Released

2026-05-29

Features

[optional-reasoning][1m-tokens-context][fast-mode-(6x-faster)][long-horizon-tasks][autonomous-execution][batch-api-50%-discount][prompt-caching-90%-discount]

Technical Specifications

Benchmarks

FrontierCode Diamond13.4%

GPQA Diamond93.6%

OSWorld-Verified83.4%

SWE-bench Pro69.2%

SWE-bench Verified88.6%

Terminal-Bench74.6%

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-opus-4-8