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Claude Sonnet 4.5

Balanced

claude-sonnet-4-5-20250929

The best balance of speed and intelligence for everyday development and production workloads. Ideal for code reviews, testing, and daily development tasks.

Specifications
Context Window200K
Max Output64K
Vision
Extended Thinking
Adaptive Thinking
Tool Use
Streaming
ProviderAnthropic
Pricing
Input Price$3/MTok
Output Price$15/MTok
Claude API Cost Calculator
Use Cases
  • Code reviews & refactoring
  • Testing & documentation
  • Daily development tasks
  • Production API workloads