Claude Haiku 4.5 API

Access Claude Haiku 4.5 from Anthropic using Puter.js AI API.

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Model Card

Claude Haiku 4.5 is Anthropic's small, fast model released October 2025, optimized for low latency and cost. Despite being the cheapest option ($1/$5 per million tokens), it matches Sonnet 4 on coding benchmarks (73.3% SWE-bench).

Context Window 200K

tokens

Max Output 64K

tokens

Input Cost $1

per million tokens

Output Cost $5

per million tokens

Input text, image, pdf

modalities

Tool Use Yes

 

Knowledge Cutoff Feb 28, 2025

 

Release Date Oct 15, 2025

 

API Usage Example

Add Claude Haiku 4.5 to your app with just a few lines of code.
No API keys, no backend, no configuration required.

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms", {
    model: "anthropic/claude-haiku-4-5"
}).then(response => {
    document.body.innerHTML = response.message.content;
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.chat("Explain quantum computing in simple terms", {
            model: "anthropic/claude-haiku-4-5"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

View full documentation →

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Frequently Asked Questions

What is this Claude Haiku 4.5 API about?

The Claude Haiku 4.5 API gives you access to Anthropic's chat model through Puter.js. With just a few lines of JavaScript, you can integrate Claude Haiku 4.5 into any web app or Node.js project — no API keys, no backend, and no configuration required.

Who created Claude Haiku 4.5?

Claude Haiku 4.5 was created by Anthropic and released on Oct 15, 2025.

What is the context window of Claude Haiku 4.5?

Claude Haiku 4.5 supports a context window of 200K tokens. For reference, that is roughly equivalent to 400 pages of text.

What is the max output length of Claude Haiku 4.5?

Claude Haiku 4.5 can generate up to 64K tokens in a single response.

What is the knowledge cutoff of Claude Haiku 4.5?

Claude Haiku 4.5 has a knowledge cutoff date of Feb 28, 2025. This means the model was trained on data available up to that date.

What types of input can Claude Haiku 4.5 process?

Claude Haiku 4.5 accepts the following input types: text, image, pdf. It produces: text.

Does Claude Haiku 4.5 support tool use (function calling)?

Yes, Claude Haiku 4.5 supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.

How much does it cost?
The Claude Haiku 4.5 API is available through the User-Pays Model. As a developer, you can add the Claude Haiku 4.5 API to your app for free — your users pay for their own AI costs directly.
Price per 1M tokens
Input$1
Output$5
How do I access the Claude Haiku 4.5 API?

You can access the Claude Haiku 4.5 API with just a few lines of JavaScript — no API keys, no backend, and no configuration required. Include the Puter.js library in your project and start making calls right away. For more details, check out our documentation.

Does the Claude Haiku 4.5 API work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Claude Haiku 4.5 API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.

Get started with Puter.js

Add Claude Haiku 4.5 to your app without worrying about API keys or setup.

Read the Docs View Tutorials