Introducing Claude Haiku 4.5: Revolutionizing AI Coding
We are thrilled to unveil Claude Haiku 4.5, our latest innovation in AI technology. This cutting-edge model is now available to all users, marking a significant leap forward in the field of artificial intelligence.
Just five months ago, Claude Sonnet 4 was a state-of-the-art model. Today, Claude Haiku 4.5 offers similar coding capabilities but at a fraction of the cost and with unprecedented speed. It surpasses its predecessor in various tasks, including computer usage, making applications like Claude for Chrome faster and more efficient.
For developers, Haiku 4.5 is a game-changer. It provides a seamless coding experience, whether it's managing multiple-agent projects or rapid prototyping. Users of Claude Code will find that Haiku 4.5 enhances responsiveness, making it an invaluable tool for real-time, low-latency tasks.
Claude Sonnet 4.5, released two weeks ago, remains our flagship model, renowned for its coding prowess. However, Claude Haiku 4.5 introduces a new dimension by offering near-frontier performance at a much lower cost. This opens up exciting possibilities for model integration, such as Sonnet 4.5 breaking down complex problems and Haiku 4.5 executing subtasks in parallel.
Haiku 4.5 is accessible through various platforms. Developers can utilize it via the Claude API, Amazon Bedrock, or Google Cloud's Vertex AI, seamlessly replacing Haiku 3.5 and Sonnet 4. The pricing is incredibly competitive at $1/$5 per million input and output tokens.
Benchmarks and Performance
Claude Haiku 4.5 has achieved remarkable benchmarks, surpassing expectations. It delivers near-frontier coding quality with lightning-fast speed and cost-effectiveness. In Augment's agentic coding evaluation, it reached 90% of Sonnet 4.5's performance, rivaling much larger models. This level of responsiveness makes AI-assisted development in Warp feel instantaneous.
Haiku 4.5 excels in sub-agent orchestration and computer-use tasks, blurring the line between speed and quality. It's a fast frontier model that maintains cost efficiency, indicating the future direction of this model class.
Intelligence Without Compromise
Claude Haiku 4.5 showcases exceptional intelligence without sacrificing speed. This enables the creation of AI applications that combine deep reasoning with real-time responsiveness, pushing the boundaries of what's possible.
A New Era of Use Cases
Just six months ago, achieving this level of performance would have been state-of-the-art. Now, Haiku 4.5 runs up to 4-5 times faster than Sonnet 4.5 at a fraction of the cost, opening up a wide range of new use cases.
Speed as the New Frontier
Haiku 4.5 proves that AI agents can operate in feedback loops with both intelligence and rapid output. It handles complex workflows reliably, self-corrects in real-time, and maintains momentum without latency overhead, making it ideal for most development tasks.
Instruction-Following Excellence
Haiku 4.5 has demonstrated exceptional instruction-following capabilities for slide text generation, achieving 65% accuracy compared to 44% from our premium tier model. This is a significant breakthrough for our unit economics.
Efficiency in AI-Powered Development
Early testing reveals that Haiku 4.5 brings efficient code generation to GitHub Copilot, matching Sonnet 4's quality but at faster speeds. It's an excellent choice for Copilot users who prioritize speed and responsiveness in their workflows.
Safety Evaluations
We conducted rigorous safety and alignment evaluations on Haiku 4.5, ensuring its responsible use. The model exhibited low rates of concerning behaviors and was significantly more aligned than its predecessor, Haiku 3.5. In our automated alignment assessment, Haiku 4.5 outperformed Sonnet 4.5 and Opus 4.1, making it our safest model yet.
Haiku 4.5 poses limited risks in producing chemical, biological, radiological, and nuclear (CBRN) weapons, earning it the AI Safety Level 2 (ASL-2) classification. You can find the full reasoning and safety test details in the Claude Haiku 4.5 system card.
Availability and Integration
Claude Haiku 4.5 is now accessible on Claude Code and our apps, allowing users to maximize their usage within premium model performance limits.
For developers, Haiku 4.5 is readily available through our API, Amazon Bedrock, and Google Cloud's Vertex AI, seamlessly integrating into existing workflows.
