Anthropic: Claude-Sonnet-3.7
Claude-Sonnet-3.7 is a reasoning model from Anthropic released on Feb 19, 2025. It reads text, images and files and writes text, with a 197K token context window and up to 128K tokens per reply.
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It costs $2.60 per million input tokens and $13 per million output tokens. Cached input bills at $0.26, 90% less than fresh input.
It supports tool calling and prompt caching.
- Modalities
- In / out price
- $2.60 / $13 per 1M
- Context
- 197K
- Max output
- 128K
- Released
- Feb 19, 2025
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Claude-Sonnet-3.7 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $2.60 / 1M tokens | |
|---|---|---|
| Output | $13 / 1M tokens | |
| Cached input (read) | $0.26 / 1M tokens | 90% off input |
| Cache write | $3.20 / 1M tokens |
What Claude-Sonnet-3.7 costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Claude-Sonnet-3.7 through an OpenAI compatible API.
- Tools
tools - Reasoning
reasoning
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Claude-Sonnet-3.7 questions
How much does the Claude-Sonnet-3.7 API cost?
$2.60 per million input tokens and $13 per million output tokens, with cached input at $0.26. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Claude-Sonnet-3.7?
196,608 tokens of input, and it can write up to 128,000 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Does Claude-Sonnet-3.7 support tool calling?
Yes. It accepts tool definitions, which is what an agent needs to call your APIs.
Is Claude-Sonnet-3.7 open source?
No. Anthropic serves it through an API only, so you cannot download the weights or host it yourself.
When was Claude-Sonnet-3.7 released?
Feb 19, 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Claude-Sonnet-3.7?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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