Claude Sonnet 4.5
✓ VerifiedThe best coding model in the world
About
Released September 29, 2025, Claude Sonnet 4.5 is the best coding model in the world, achieving 77.2% on SWE-Bench Verified benchmark, outperforming competitors like GPT-5. It's the strongest model for building complex agents and the best model at using computers. Features extended thinking mode for complex problem-solving and is Anthropic's most aligned frontier model for safety. Shows substantial gains in reasoning and math.
Key Features
- ✓Best coding model (77.2% SWE-bench Verified)
- ✓Complex agent building
- ✓Computer use
- ✓Extended thinking mode
- ✓Most aligned frontier model for safety
- ✓Advanced reasoning and math
Use Cases
Technical Details
Languages
Frequently Asked Questions
What is Claude Sonnet 4.5?
Released September 29, 2025, Claude Sonnet 4.5 is the best coding model in the world, achieving 77.2% on SWE-Bench Verified benchmark, outperforming competitors like GPT-5. It's the strongest model for building complex agents and the best model at using computers. Features extended thinking mode for complex problem-solving and is Anthropic's most aligned frontier model for safety. Shows substantial gains in reasoning and math.
How much does Claude Sonnet 4.5 cost?
Claude Sonnet 4.5 offers pay-per-use pricing. Plans include: .
What can Claude Sonnet 4.5 do?
Claude Sonnet 4.5 provides code generation, AI chat, agentic/autonomous mode. Key features include: Best coding model (77.2% SWE-bench Verified), Complex agent building, Computer use.
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