Opening article
Anthropic has introduced Claude Haiku 4.5. According to the company, the new model matches state-of-the-art coding capabilities from months ago. It also delivers unprecedented speed and cost-efficiency for complex tasks.
Claude Haiku 4.5, our latest small model, is available today to all users.
What was recently at the frontier is now cheaper and faster. Five months ago, Claude Sonnet 4 was a state-of-the-art model. Today, Claude Haiku 4.5 gives you similar levels of coding performance but at one-third the cost and more than twice the speed.
Claude Haiku 4.5 even surpasses Claude Sonnet 4 at certain tasks, like using computers. These advances make applications like Claude for Chrome faster and more useful than ever before.
Developers can use Claude Haiku 4.5 on our 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 our most economical price point.
Claude Haiku 4.5 is remarkably capable— just six months ago, this level of performance would have been state-of-the-art on our internal benchmarks. Now it runs up to 4-5 times faster than Sonnet 4.5 at a fraction of the cost, unlocking an entirely new set of use cases.
Claude Haiku 4.5 is available everywhere today. If you’re a developer, simply use claude-haiku-4-5 via the Claude API. Pricing is now $1/$5 per million input and output tokens.
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. And users of Claude Code will find that Haiku 4.5 makes the coding experience—from multiple-agent projects to rapid prototyping—markedly more responsive.
Claude Sonnet 4.5, released two weeks ago , remains our frontier model and the best coding model in the world. Claude Haiku 4.5 gives users a new option for when they want near-frontier performance with much greater cost-efficiency. It also opens up new ways of using our models together. For example, Sonnet 4.5 can break down a complex problem into multi-step plans, then orchestrate a team of multiple Haiku 4.5s to complete subtasks in parallel.
Claude Haiku 4.5 hit a sweet spot we didn't think was possible: near-frontier coding quality with blazing speed and cost efficiency . In Augment's agentic coding evaluation, it achieves 90% of Sonnet 4.5's performance, matching much larger models. We're excited to offer it to our users.
The release of Claude Haiku 4.5 highlights the rapid advancement of efficient AI models that combine high-level coding performance with speed and cost-effectiveness.