Claude Haiku 4.5 even surpasses Claude Sonnet 4 at certain tasks, like using computers
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Users who rely on AI for real-time, low-latency tasks like chat assistants, customer service agents, or pair programming will appreciate Haiku 4.5’s combination of high intelligence and remarkable speed.
Key facts
Developers can use Claude Haiku 4.5 on their API, Amazon Bedrock, and Google Cloud’s Vertex AI, where it serves as a drop-in replacement for both Haiku 3.5 and Sonnet 4 at their most economical price
For that reason, they've released it under the AI Safety Level 2 (ASL-2) standard—compared to the more restrictive ASL-3 for Sonnet 4.5 and Opus 4.1
All OpenAI scores reported from their GPT-5 post, GPT-5 for developers post, GPT-5 system card (SWE-bench Verified reported using n=500), and Terminal Bench leaderboard (using Terminus 2)
Anthropic is contributing an additional $20 million to Public First Action, bringing their total support to $40 million
Summary
Claude Haiku 4.5, their latest small model, is available today to all users. What was recently at the frontier is now cheaper and faster. Claude Haiku 4.5 even surpasses Claude Sonnet 4 at certain tasks, like using computers. Claude Sonnet 4.5, released two weeks ago, remains their frontier model and the best coding model in the world.