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Use Claude Haiku 4.5, Anthropic's lightweight model for responsive chat, coding assistance and everyday automation, in the browser or through the API.
- From $0.42 in / $2.10 out per 1M tokensSave up to 58%
- OpenAI- and Anthropic-compatible API
- Chat · Coding · Automation
What can I help you with?
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What is Claude Haiku 4.5?
Anthropic positions Claude Haiku 4.5 as a lightweight model for fast, cost-efficient applications. Its description focuses on chat assistants, coding support and high-volume automation where response time and running cost matter.
On UniRoute, send a message in the workspace or use the model ID claude-haiku-4-5 through Chat Completions or Anthropic Messages. The API section provides request examples for both formats.
Claude Haiku 4.5 belongs to Anthropic’s lightweight Haiku line. Anthropic emphasizes responsive chat, practical coding support and efficient automation; compare the specifications and rates below with the demands of your own workload.
What you can do
What Claude Haiku 4.5 is built for.
Conversational assistance
Answer questions and revise replies through follow-up instructions in the same conversation.
Coding support
Draft small code changes, explain unfamiliar code and help investigate errors.
Automation through tools
Use API function calling to connect the model to your own support or data-processing tools.
This page accepts text messages; file inputs and function calling need the API, while search and structured output are not exposed by the current model configuration.
Specs & variants
The variants you can call, with their options and prices.
| Variant | Model ID | Modes | Inputs | Output | Price |
|---|---|---|---|---|---|
| Claude Haiku 4.5 | claude-haiku-4-5 | Chat and text generation | Chat messages | Streaming; Context window: Not stated on this page | $0.42 input / $2.10 output per 1M tokens |
Pricing
Priced per token. Input and output are billed separately.
| Usage | Official API | UniRoute | Save |
|---|---|---|---|
| Input | $1.00 | $0.42 | Save 58% |
| Output | $5.00 | $2.10 | Save 58% |
| Cache read | $0.10 | $0.042 | Save 58% |
| Cache write (5 min) | $1.25 | $0.525 | Save 58% |
| Cache write (1 hour) | $2.00 | $0.84 | Save 58% |
Official price: platform.claude.com · 2026-11-07
Prices updated 2026-11-08.
Pay as you go from a single USD wallet balance. You see the quote before each request.
API
Call Claude Haiku 4.5 through OpenAI- or Anthropic-compatible endpoints.
curl 'https://api.uniroute.app/v1/chat/completions' \ -H 'Authorization: Bearer YOUR_API_KEY' \ -H 'Content-Type: application/json' \ -d '{ "model": "claude-haiku-4-5", "messages": [ { "role": "user", "content": "Hello" } ], "stream": false}'curl 'https://api.uniroute.app/v1/messages' \ -H 'Authorization: Bearer YOUR_API_KEY' \ -H 'anthropic-version: 2023-06-01' \ -H 'Content-Type: application/json' \ -d '{ "model": "claude-haiku-4-5", "max_tokens": 1024, "messages": [ { "role": "user", "content": "Hello" } ]}'Parameters
| Name | In | Description |
|---|---|---|
model | Body | Model ID to run. |
messages | Body | The conversation as a list of role and content messages. |
max_tokens | Body | Upper limit on generated tokens (Anthropic Messages). |
stream | Body | Set to true to receive the response as a stream. |
anthropic-version | Header | Protocol version header for the Anthropic Messages API. |
Guides
Use cases
Typical ways to put Claude Haiku 4.5 to work.
Support assistants
Draft responses to customer questions using the context your application supplies.
Developer helpers
Add code explanations, debugging suggestions and prototype drafting to a development tool.
Routine data tasks
Use the API for recurring text-processing steps inside a larger automation workflow.
FAQ
Common questions about Claude Haiku 4.5.
What is Claude Haiku 4.5?
Anthropic positions Claude Haiku 4.5 as a lightweight model for fast, cost-efficient applications. Its description focuses on chat assistants, coding support and high-volume automation where response time and running cost matter.
How much does Claude Haiku 4.5 cost?
From $0.42 input / $2.10 output per 1M tokens. Input and output are billed separately according to usage. The pricing table and worked examples show how the rates apply (prices updated 2026-11-08).
Which API formats can I use?
Use the model ID claude-haiku-4-5 with Chat Completions or Anthropic Messages. The API section shows both request formats and their parameters.
What can I send in the chat box?
The workspace on this page accepts text messages. File inputs need the API; they cannot be attached in this chat box.
Does this variant expose thinking controls?
No. The current UniRoute configuration for this variant does not expose thinking controls or a reasoning-effort setting.
Is there a free trial or free credits?
No. Requests are paid from your wallet balance. You can read this page and review the prices without paying, and you need an account with funds to send a message.
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