Claude Sonnet 4.5
AnthropicLanguage modeling/generationCode generationSystem controlQuestion answeringQuantitative reasoningMathematical reasoningVisual question answering
Claude Sonnet 4.5 is language modeling/generation model published by Anthropic in 2025.
About Claude Sonnet 4.5
Claude Sonnet 4.5 is the best coding model in the world. It's the strongest model for building complex agents. It’s the best model at using computers. And it shows substantial gains in reasoning and math.
Code is everywhere. It runs every application
LLM pricing & performance
Full LLM page →Claude Sonnet 4.5 is available via API — live cost, context, and benchmark data:
Input / 1M
$3.00
Output / 1M
$15.00
Context
200K
Tokens/sec
—
Details
- Provider
- Anthropic
- Task
- Language modeling/generation,Code generation,System control,Question answering,Quantitative reasoning,Mathematical reasoning,Visual question answering
- Released
- 2025-09-29
- Open weights
- No