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Anthropic: Claude Sonnet 4.5

Reasoning Tool Calling Attachments

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...

Providers 2
Released Sep 29, 2025
Input Modalities image, pdf, text
Output Modalities text
Tarsk Use coding

Benchmarks

37.1
Intelligence Index
33.5
Coding Index
37
Math Index

Available Providers (2)

Provider Model ID Input Cost Output Cost Context Max Output Docs
Kilo Gateway anthropic/claude-sonnet-4.5 $3.00/MTok $15.00/MTok 1M 64K
Helicone claude-4.5-sonnet $3.00/MTok $15.00/MTok 200K 64K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output