Claude Opus 5.5

Name: Claude Opus 5.5
Author: Anthropic

Anthropic🇺🇸 United States

active

Compare with other models →

Context window1000K tokens

Output / 1M tokens$20

Version History

5.5minorSeptember 22, 2026

Opus 5.5 lowers output pricing to $20 per million tokens from $25 and improves inference speed through reduced compute requirements, while also revising response style to prioritize key information and reduce jargon.

Benchmark Scores

Full leaderboard →

97.0 tokens_per_sec

Speed (tok/s)

Coverage

changelogAnthropic

Anthropic Releases Claude Opus 5.5, Cuts Output Pricing to $20 per Million Tokens

Anthropic released Claude Opus 5.5 on Tuesday, cutting output token pricing to $20 per million tokens from $25 while improving coding and knowledge-work performance. The model arrives as Anthropic CEO Dario Amodei has pledged to slow capability advances to match safety work.

September 22, 2026 · 4:36 PM3 min read

Anthropic Claude Opus 5.5