Claude Opus 4.6 Is Now Available in Puter.js

Puter.js now supports Claude Opus 4.6, Anthropic's most powerful AI model to date—featuring a 1 million token context window, and 128K output tokens.

What is Claude Opus 4.6?

Claude Opus 4.6 is Anthropic's latest and most capable model, released on February 5, 2026. It builds on the intelligence of Opus 4.5 with major improvements across coding, agentic tasks, and long-context understanding.

Key highlights:

• 1 million token context window — process entire codebases, lengthy documents, and complex datasets in a single prompt
• 128,000 output tokens — generate substantially longer responses for detailed analyses and code generation
• Adaptive thinking — the model autonomously decides when and how much to reason, replacing the manual extended thinking toggle

Examples

Code Generation

puter.ai.chat("Write a TypeScript function that implements a concurrent task queue with configurable parallelism",
  { model: 'claude-opus-4-6' }
);

Long-Context Analysis

puter.ai.chat([
  { role: "user", content: largeCodebase + "\n\nReview this codebase for security vulnerabilities and suggest fixes." }
], { model: 'claude-opus-4-6' });

Streaming

const response = await puter.ai.chat(
  "Write a detailed comparison of Rust and Go for systems programming",
  { model: 'claude-opus-4-6', stream: true }
);

for await (const part of response) {
  puter.print(part?.text);
}

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 4.6 immediately.

Learn more:

• Free, Unlimited Claude API
• Puter.js AI Documentation