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Model detail

Claude Haiku 4.5 20251001

Provided by Anthropic
Pay-as-you-go

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

02

API endpoints

One MixRoute gateway, OpenAI-compatible

  • Anthropic Messages /v1/messages POST
  • OpenAI-compatible /v1/chat/completions POST
  • Gemini /v1beta/models/{model}:generateContent POST

03

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.

07

Capabilities & compatibility

Unconfirmed capabilities stay "Unknown," no guesses

Available:

Tool calling

Claude Haiku 4.5 supports function and tool calls.

EX Send a tools definition; the response returns tool_calls to execute and feed results back.
Available:

Structured output

Claude Haiku 4.5 can produce JSON-formatted output on demand.

EX response_format: { type: "json_schema" } forces valid JSON output.
Available:

Streaming

Claude Haiku 4.5 supports streamed responses.

EX stream: true streams tokens incrementally, so chat UIs render as they arrive.
Available:

Prompt caching

Claude Haiku 4.5 supports prompt caching under supported routing conditions.

EX Keep the system prompt and tool definitions at the start of the request; repeated prefixes are automatically billed at the cache-read rate.
Available:

Vision input

Claude Haiku 4.5 can process image inputs alongside text.

EX Pass a base64-encoded image in a image_url content part alongside text messages.
Available:

OpenAI SDK

Call Claude Haiku 4.5 through MixRoute's OpenAI-compatible endpoint.

EX Change 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.