Anthropic introduced Claude Haiku 4.5, its fastest and most efficient small AI model to date. This model delivers coding performance comparable to Claude Sonnet 4 but at one-third the cost and more than twice the speed.
It achieved a 73% score on the SWE-Bench Verified benchmark and a 41% score on Terminal-Bench, rivaling OpenAI's GPT-5 and Google's Gemini 2.5 in coding and command-line tasks.
Haiku 4.5 is available to all users on Anthropic's free plan and can be accessed via Claude's API, Amazon Bedrock, and Google Cloud Vertex AI.
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