Claude Haiku 4.5

Claude Haiku 4.5 is Anthropic's small, fast model released in 2025, delivering strong coding, tool use and reasoning at one-third the cost and more than twice the speed of Sonnet 4.5. Per Anthropic, it matches Sonnet 4 on coding, computer use and agentic workflows and scores 73.3% on SWE-bench Verified. It supports a 200K-token context window, up to 64K output tokens and extended thinking, with pricing starting at $1 per million input and $5 per million output tokens and up to 90% savings via prompt caching. Ideal for high-volume, latency-sensitive and multi-agent workloads where cost and speed matter.

curl https://api.tunerouter.com/v1/chat/completions \
  -H "Authorization: Bearer $TUNEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-haiku-4-5-20251001", "messages": [{"role": "user", "content": "Hello!"}]}'

Model ID: claude-haiku-4-5-20251001 · works with OpenAI SDKs — just point base_url at api.tunerouter.com