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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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Enter a question, task, or topic you'd like help with, and provide any details or context that may be relevant.
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The AI analyzes your request and generates accurate, relevant, and context-aware responses in real time.
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