Claude Opus 4.5 Is Now Available in Puter.js

Puter.js now supports Claude Opus 4.5, the best coding model in the world.

What is Claude Opus 4.5?

Claude Opus 4.5 is the best model in the world for coding and agentic use. It also excels in tasks such as deep research as well as working with slides and spreadsheets.

Examples

Deep Research

puter.ai.chat("Compare the benefits and drawbacks of solar vs wind energy", 
  { model: 'claude-opus-4-5' }
);

Code generation

puter.ai.chat("Write a Python function to sort a list", 
  { model: 'claude-opus-4-5' }
);

Get Started Now

Just add one script tag to your HTML:

<script src="https://js.puter.com/v2/"></script>

No API keys and no infrastructure setup. Start building with Claude Opus 4.5 immediately.

Learn more:

• Free, Unlimited Claude API
• Puter.js Documentation