Claude Sonnet 4.5
Anthropic
anthropic/claude-sonnet-4.5Claude Sonnet 4.5 is an upgraded mid-tier model in the Claude 4 line, improving coding, computer use, and long-context reasoning over Sonnet 4 while keeping Sonnet-level pricing. It is well suited for enterprise workflows, agentic coding, and general-purpose assistant tasks.
Cost rate
3x
Context
1M
Released
Sep 29, 2025
Input
TextImageFile
Output
Text
Support
ReasoningTool callingStructured outputs
Best at
The categories where this model ranks highest.
Document analysis
#23 · top 59%
Writing, Literature, & Language
#36 · top 9%
Entertainment, Sports, & Media
#38 · top 10%
Business, Management, & Finance
#47 · top 12%
Performance
Median latency and throughput measured across recent requests.
Throughput39 tok/s
Latency