Claude Sonnet 5.5

by Anthropicewest/claude-sonnet

Strong reasoning and writing; a good default for harder tasks.

LanguageChatStreamingWriting
PlaygroundAPIPricingDetails
Illustration made with FLUX.1 schnell: a writer's desk with an open notebook overlooking a city at sunrise

Try Claude Sonnet 5.5 in your browser

Sign in to run this model in the playground. Usage is billed to your organisation.

Sign in to try it

API

OpenAI-compatible chat completions; works with the official OpenAI SDKs. Every response carries an x-request-id trace ID.

curl https://api.ewest.ai/v1/chat/completions \
  -H "Authorization: Bearer $EWEST_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "ewest/claude-sonnet", "stream": true,
       "messages": [{"role": "user", "content": "Hello!"}]}'

Pricing

Input
$2.00 per million tokens
Output
$10.00 per million tokens

1,000 requests of 1,000 tokens in and 300 out cost about $5. Billed on the tokens the model actually reads and writes.

Details

Context window
200,000 tokens
API
OpenAI-compatible chat completions, streaming