Claude Opus 5.5
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Anthropic releases Claude Opus 5.5, 40% cheaper than Opus 5 with improved performance.
Claude Opus 5.5 is the first model in the new Claude 5.5 family, costing 40% less than Opus 5 to run ($4/$20 per million tokens input/output). It matches Claude Fable 5.1 on most work, leads on agentic coding benchmarks (Terminal-Bench 4.0: 66.4%, FrontierCode: 54.4%), and achieves the best scores on Anthropic's automated behavioral audit. An early tester completed a 680,000-line code migration in under a day. The model also communicates more naturally, puts important information up front, and generates output 30% faster than Opus 5. Claude Sonnet 5.5 and Haiku 5.5 will follow in coming weeks.
What commenters are saying
The top comment criticizes Claude Opus 5 for being the worst major release of 2026, saying it was not ready for the general public. The commenter notes they switched to the older Claude 4.8 model and used Anthropic models the least in two years as a result. They express hope that Opus 5.5 will make the $20 subscription worthwhile again.