From Anthropic · · 1m 30s
Claude Opus 5.5 Launches
Claude Opus 5.5 delivers top performance at 40% lower cost than Opus 5.
In brief
Claude Opus 5.5 delivers top performance at 40% lower cost than Opus 5. Claude Opus 5.5 is the first model in Claude 5.5 family with 40% lower cost and better performance than Opus 5. Originally reported by Anthropic.
Claude Opus 5.5 Launch
Claude Opus 5.5 is the first model in Claude 5.5 family with 40% lower cost than Opus 5.
Performance Boost
Opus 5.5 completes 680,000-line code migration in less than a day.
Safety Improvements
Opus 5.5 achieves best scores on automated behavioral audit.
Cost Efficiency
Cache reads cost $0.20 per million tokens, 60% less than Opus 5.
Pricing Details
Input tokens cost $4 per million, 20% less than Opus 5.
Safeguards for Specialized Use
Vetted organizations can apply to Life Sciences Verification Program.
Cybersecurity Access
Verified cybersecurity practitioners get access to Cyber Verification Program.
Natural Communication
Opus 5.5 writes clearly and follows user's style.
Coding Performance
Opus 5.5 fixes 39 of 40 web app load times.
Terminal Benchmark
Opus 5.5 beats GPT-6 Astra at 40% of the cost.
FrontierCode Results
Opus 5.5 scores 54.6% on FrontierCode, beating GPT-6 Astra.
CursorBench Performance
Opus 5.5 scores 52.5% on CursorBench, 11 points above Opus 5.
Real-World Testing
Opus 5.5 audits 200,000-line codebase in under three hours.
Next Releases
Claude Sonnet 5.5 and Claude Haiku 5.5 will follow in coming weeks.
The key point
Claude Opus 5.5 is the first model in Claude 5.5 family with 40% lower cost and better performance than Opus 5.
