Claude 4 Sonnet
by NanoGPT · family claude-sonnet · listed Sep 2025TV
Claude 4 Sonnet by Anthropic. A new generation model with improved capabilities, especially on programming and development. NOTE: Inputs > 200k tokens are charged at 2x input, 1.5x output rate.
Current rates USD per 1M tokens
Input$3.00
Output$15.00
Cache read$0.30
Cache write—
Against the market
On the record
- Model id
anthropic/claude-sonnet-4- Context window
- 200K tokens
- Max output
- 64K tokens
- Input modalities
- text, image, pdf
- Output modalities
- text
- Reasoning
- no
- Tool calls
- yes
- Open weights
- no
- Knowledge cutoff
- —
- Released
- 2025-09-29
- Last updated
- 2025-09-29
- Provider docs
- docs.nano-gpt.com
Back of the envelope
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