How do you use Claude Haiku 4.5?

Claude Haiku 4.5 can be called through OpenRouter's OpenAI-compatible API using the model ID anthropic/claude-haiku-4.5. This page includes a ready-to-run curl example and the supported parameter list.

Is Claude Haiku 4.5 free?

Claude Haiku 4.5 is a paid model in the OpenRouter catalog, with separate input and output token pricing shown on this page.

Claude Haiku 4.5

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Claude Haiku 4.5

Q: What is Claude Haiku 4.5?

Claude Haiku 4.5 is an AI model from Anthropic in the Claude series. Agent Mag tracks its context window, pricing, modalities, and supported API parameters on this page.

200K context

$1.00/M input

$5.00/M output

Claude Haiku 4.5 is an AI model from Anthropic built for agent workflows, with support for image, text input and text output. Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance...

What is Claude Haiku 4.5?

Claude Haiku 4.5 is an AI model from Anthropic that Agent Mag tracks for pricing, context window, modalities, benchmarks, and API compatibility. Builders can use this page to compare Claude Haiku 4.5 against other models for agent workflows and production deployments.

Model ID

Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance...

Modalities

Input

imagetext

Output

text

Supported Parameters

include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_ktop_p

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What is Claude Haiku 4.5?

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