Claude Haiku 4.5

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 across reasoning, coding, and computer-use tasks, Haiku 4.5 brings frontier-level capability to real-time and high-volume applications. It introduces extended thinking to the Haiku line; enabling controllable reasoning depth, summarized or interleaved thought output, and tool-assisted workflows with full support for coding, bash, web search, and computer-use tools. Scoring >73% on SWE-bench Verified, Haiku 4.5 ranks among the world’s best coding models while maintaining exceptional responsiveness for sub-agents, parallelized execution, and scaled deployment.

ChatAnthropic200k tokens$1.0901 / $5.4503 · 1M

anthropic/claude-haiku-4.5

Context
200k tokens
Completion cap
64,000
Tools
Yes
JSON
Yes
Released
2025-10-15

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-haiku-4.5",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is Claude Haiku 4.5?
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 across reasoning, coding, and computer-use tasks, Haiku 4.5 brings frontier-level capability to real-time and high-volume applications. It introduces extended thinking to the Haiku line; enabling controllable reasoning depth, summarized or interleaved thought output, and tool-assisted workflows with full support for coding, bash, web search, and computer-use tools. Scoring >73% on SWE-bench Verified, Haiku 4.5 ranks among the world’s best coding models while maintaining exceptional responsiveness for sub-agents, parallelized execution, and scaled deployment. Claude Haiku 4.5 runs on the Geek Hub API (OpenAI-compatible). Model id: anthropic/claude-haiku-4.5.
Is Claude Haiku 4.5 free?
No. Input is $1.0901 per 1M tokens and output is $5.4503 per 1M tokens on Geek Hub (markup included).
What is the context length of Claude Haiku 4.5?
Claude Haiku 4.5 has a 200k tokens context window. It supports up to 64,000 completion tokens.
Does Claude Haiku 4.5 support tool calling and structured outputs?
Claude Haiku 4.5 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was Claude Haiku 4.5 released?
Claude Haiku 4.5 was released on 2025-10-15.

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