Model
Claude Haiku 4.5
by Anthropic
Family
Claude 4 / Haiku
Context window
200,000 tokens
Open weights
No
Release date
2025-10-01
Benchmark notes
Anthropic's fastest and lowest-cost production model tier as of mid-2026. Priced at $1/$5 per million input/output tokens. Targets high-volume, low-latency applications such as chatbots, automated responses, and lightweight agentic subtasks. Notably improved coding performance over the Claude 3.5 Haiku predecessor. Available via Anthropic API, Amazon Bedrock, Google Cloud Vertex AI, and Claude.ai.