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Claude Haiku 4.5

Fast, lightweight, and built for high-volume tasks. Claude Haiku 4.5 delivers instant responses without sacrificing quality.

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Fast, Smart and Affordable Claude Haiku 4.5

Fast, affordable, and surprisingly capable — experience Sonnet-level intelligence at Haiku speed and cost

  • Speed Meets Intelligence in One Model

    Claude Haiku 4.5 is Anthropic's fastest and most efficient model, delivering near-frontier performance at a fraction of the cost of larger models. Launched in October 2025, it achieves 73% on SWE-Bench Verified — matching Claude Sonnet 4.5 on software engineering benchmarks — while running at more than twice the speed. Whether you're asking quick questions, processing documents, or running real-time conversations, Haiku 4.5 gives you sharp, accurate answers without the wait. Available now inside Chat Smith for all users.

  • Extended Thinking for Deeper Reasoning

    Claude Haiku 4.5 is the first Haiku model to include extended thinking — a capability previously reserved for Anthropic's larger Sonnet and Opus models. When faced with complex problems that require step-by-step reasoning, Haiku 4.5 can pause, think through the logic, and deliver more accurate and well-considered answers. This means you no longer have to choose between speed and depth. For questions involving analysis, multi-step logic, or nuanced judgment, Haiku 4.5 brings a level of reasoning quality that far exceeds expectations for a lightweight model.

  • Vision Support for Text and Image Tasks

    Claude Haiku 4.5 processes both text and images, making it a genuinely multimodal assistant for everyday use. Upload a photo, diagram, screenshot, or document image alongside your question and Haiku 4.5 will analyze the visual content together with your text to provide accurate, context-aware responses. Whether you're asking about a chart, extracting data from a scanned form, or describing what's in a photo, Haiku 4.5 handles visual inputs with the same precision and speed it brings to text-only tasks.

  • 200K Token Context for Long Documents

    Despite being a lightweight model, Claude Haiku 4.5 supports a 200,000-token context window with up to 64,000 output tokens — large enough to process entire books, lengthy legal contracts, or extended technical documentation in a single session. The model maintains full coherence across long conversations and complex, multi-turn exchanges, ensuring that earlier parts of your conversation stay relevant throughout. For users dealing with long documents or extended workflows, Haiku 4.5 keeps up without breaking a sweat.

  • Built for High-Volume, Real-Time Applications

    Claude Haiku 4.5 was designed for scale. Its low per-token cost and high throughput make it the ideal choice for applications that require fast, consistent AI responses at volume — from customer support bots and real-time chat interfaces to document processing pipelines and automated coding workflows. Inside Chat Smith, Haiku 4.5 is your go-to model whenever you need reliable, high-quality answers delivered at speed, without the overhead of a larger, slower model slowing your experience down.

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