Model detail
Claude Haiku 4.5 20251001
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.
Model specs
- Model ID
-
claude-haiku-4-5-20251001
- Context length
- 200K
- Max output
- 64K
- I/O modalities
- Released
- 2025-10
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API endpoints
One MixRoute gateway, OpenAI-compatible
-
Anthropic Messages
/v1/messagesPOST -
OpenAI-compatible
/v1/chat/completionsPOST -
Gemini
/v1beta/models/{model}:generateContentPOST
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Pricing
Flat rate, unit: /1M Tokens
Input
$1.0000 /1M Tokens
Completion
$5.0000 /1M Tokens
Cache read
$0.1000 /1M Tokens
Cache creation
$1.2500 /1M Tokens
05
Selection summary
Quickly judge whether it fits your workload
What is this model good for?
Fast, efficient frontier intelligence for real-time apps
Use Claude Haiku 4.5 for real-time and high-volume applications. It delivers near-frontier intelligence at a fraction of the cost and latency, scoring >73% on SWE-bench Verified with extended thinking support.
What should you check before using it?
Test extended thinking and tool-assisted workflows
Haiku 4.5 introduces extended thinking with controllable reasoning depth. Test your coding, bash, web search, and computer-use tools to confirm they work as expected. Knowledge cutoff: 2025-02.
Why use it through MixRoute?
Claude Haiku 4.5 takes text and images on one route
Text and image inputs share the same route and the same key. MixRoute serves Claude Haiku 4.5 on the OpenAI-compatible endpoint /v1/chat/completions; point your existing client at https://api.mixroute.ai/v1 with the model ID claude-haiku-4-5-20251001 and re-run your integration tests.
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Capabilities & compatibility
Unconfirmed capabilities stay "Unknown," no guesses
Tool calling
Claude Haiku 4.5 supports function and tool calls.
tools definition; the response returns tool_calls to execute and feed results back.
Structured output
Claude Haiku 4.5 can produce JSON-formatted output on demand.
response_format: { type: "json_schema" } forces valid JSON output.
Streaming
Claude Haiku 4.5 supports streamed responses.
stream: true streams tokens incrementally, so chat UIs render as they arrive.
Prompt caching
Claude Haiku 4.5 supports prompt caching under supported routing conditions.
Vision input
Claude Haiku 4.5 can process image inputs alongside text.
image_url content part alongside text messages.
OpenAI SDK
Call Claude Haiku 4.5 through MixRoute's OpenAI-compatible endpoint.
base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.
08
Token cost estimator
Live estimate from this page's pricing, not an actual bill
Share of the same prefix read repeatedly, up to 100%
09
FAQ
Use the model ID claude-haiku-4-5-20251001 through the compatible chat completions endpoint. It supports extended thinking with controllable reasoning depth.
One endpoint, a testable decision
Test this model and alternate routes with the same request format
Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.