Claude Haiku 4.5

Claude Haiku 4.5, released by Anthropic in October 2025, is the fastest model in the Claude family while maintaining a 200K token context window. It's designed for applications where speed and cost-efficiency are priorities, without sacrificing too much capability compared to the higher-tier models.

Remarkably, Haiku 4.5 achieves approximately 90% of Sonnet 4.5's performance on agentic coding tasks, making it a compelling choice for many production use cases. A notable feature is its support for extended thinking-a capability that was previously limited to premium models-allowing it to engage in more deliberate reasoning when needed.

Priced at $1 per million input tokens and $5 per million output tokens, Claude Haiku 4.5 offers the most cost-effective option in Anthropic's lineup while maintaining strong performance. This combination of speed, capability, and affordability makes it particularly attractive for high-volume applications, rapid prototyping, and use cases where the full power of Opus or Sonnet isn't required but Claude's safety and quality characteristics are still desired.