Claude Sonnet 4.5 (latest)
by Impossibl · family claude-sonnet · listed Sep 2025RTV
Balanced Claude model for coding, analysis, agent workflows, and cost control
Current rates USD per 1M tokens
Input$3.00
Output$15.00
Cache read$0.30
Cache write$3.75
Against the market
On the record
- Model id
anthropic/claude-sonnet-4-5- Context window
- 200K tokens
- Max output
- 64K tokens
- Input modalities
- text, image, pdf
- Output modalities
- text
- Reasoning
- yes
- Tool calls
- yes
- Open weights
- no
- Knowledge cutoff
- Jul 2025
- Released
- 2025-09-29
- Last updated
- 2025-09-29
- Provider docs
- impossibl.com/docs/models
Back of the envelope
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