Claude Haiku 4.5

by Anthropicewest/claude-haiku

Anthropic's fastest model for everyday tasks.

LanguageChatStreamingFast

Illustration made with FLUX.1 schnell: a raked zen garden with a single stone at dawn

Try Claude Haiku 4.5 in your browser

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-haiku", "stream": true,
       "messages": [{"role": "user", "content": "Hello!"}]}'

Pricing

Input: $1.00 per million tokens
Output: $5.00 per million tokens

1,000 requests of 1,000 tokens in and 300 out cost about $2.50. Billed on the tokens the model actually reads and writes.

Details

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