Claude Opus 4.5
Anthropic's most powerful model, first to break 80% on SWE-bench Verified (80.9%). Best in the world for coding and autonomous agents. Features an effort parameter for speed vs thoroughness tradeoffs.
Pricing
Ratings
Pros
- Best coding model available (80.9% SWE-bench)
- Excellent for autonomous agents
- Effort parameter allows speed/quality tradeoff
- 76% fewer tokens than Sonnet at same quality
- Strong at long-horizon tasks
Cons
- More expensive than Sonnet
- Slower on simple tasks
- Requires Claude Pro/Max subscription for full access
Benchmark Results
Best For
Professional developers, complex codebases, autonomous agents
Quick Info
- Provider
- Anthropic
- Version
- 4.5
- Released
- Nov 2025
- Context
- 200K tokens
Features
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