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Anthropic
Released September 2025
Claude Sonnet 4.5
Balanced, agentic coding, tool orchestration
Tool Use
Vision
About this model
Anthropic's latest Sonnet iteration represents a significant advancement in the Claude family, featuring state-of-the-art performance on coding benchmarks such as SWE-bench Verified. The model introduces stronger agentic capabilities including improved tool orchestration, speculative parallel execution, and enhanced context management. It's designed for extended autonomous operation while maintaining task continuity across sessions.
Context Window
1M
Input Cost
$3/M
Output Cost
$15/M
Input Types
Text, Image