Claude 4.5 Haiku
Claude 4.5 Haiku is a text generation model from Anthropic with a 200,000-token context window and image input support.
AnthropicFast, vision-capable text generation from Anthropic
Claude 4.5 Haiku is a large language model developed by Anthropic, released in October 2025. It belongs to the Haiku tier of Anthropic's Claude model family, which is designed for tasks that require low latency and high throughput. The model supports a 200,000-token context window and can process image inputs alongside text, making it suitable for multimodal workflows.
Claude 4.5 Haiku is well-suited for applications that need to handle long documents, extended conversations, or image-based queries at scale. Its maximum response size of 64,000 tokens allows for detailed outputs without truncation in most use cases. Developers typically reach for Haiku-tier models when building production systems where response speed and cost efficiency are priorities alongside capable language understanding.
What Claude 4.5 Haiku supports
Long Context Window
Processes up to 200,000 tokens of input in a single request, enabling analysis of long documents, codebases, or extended conversation histories.
Image Understanding
Accepts image inputs alongside text prompts, allowing the model to describe, analyze, or answer questions about visual content.
Extended Response Output
Generates responses up to 64,000 tokens, supporting detailed summaries, long-form drafts, and comprehensive code outputs in a single reply.
Instruction Following
Handles structured prompts and multi-step instructions, making it suitable for agentic workflows and tool-use pipelines.
Low-Latency Chat
Designed for high-throughput, responsive interactions, making it appropriate for real-time chat interfaces and production API integrations.
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Get Started FreeBenchmark scores
Scores represent accuracy — the percentage of questions answered correctly on each test.
| Benchmark | What it tests | Score |
|---|---|---|
| MMLU-Pro | Expert knowledge across 14 academic disciplines | 80.0% |
| GPQA Diamond | PhD-level science questions (biology, physics, chemistry) | 64.6% |
| LiveCodeBench | Real-world coding tasks from recent competitions | 51.1% |
| HLE | Questions that challenge frontier models across many domains | 4.3% |
| SciCode | Scientific research coding and numerical methods | 34.4% |
Common questions about Claude 4.5 Haiku
What is the context window size for Claude 4.5 Haiku?
Claude 4.5 Haiku supports a context window of 200,000 tokens, allowing it to process large documents or long conversation histories in a single request.
Does Claude 4.5 Haiku support image inputs?
Yes. Claude 4.5 Haiku accepts image inputs alongside text, enabling multimodal tasks such as image description and visual question answering.
What is the maximum response length for Claude 4.5 Haiku?
The model can generate responses of up to 64,000 tokens per reply, which accommodates detailed outputs such as long-form documents or extensive code.
When was Claude 4.5 Haiku released?
Claude 4.5 Haiku was released in October 2025 by Anthropic.
What is Claude 4.5 Haiku best suited for?
It is designed for use cases that require fast response times and high throughput, such as real-time chat applications, document analysis, and production API integrations where latency and cost efficiency matter.
Parameters & options
When enabled, the model will explain its thought process step-by-step before providing a final answer. This can help users understand how the model arrived at its conclusions, but may result in longer responses.
You can allocate a larger thinking budget to support more thorough reasoning. Must be less than max. response size
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