Claude Opus 4.7 Fast Is Now Available in Puter.js

Puter.js now supports Claude Opus 4.7 Fast, a high-speed configuration of Anthropic's most capable model—delivering up to 2.5x faster output with no reduction in quality.

What is Claude Opus 4.7 Fast?

Claude Opus 4.7 Fast is Anthropic's speed-optimized variant of Opus 4.7. It runs the exact same model weights as standard Opus 4.7 but with a faster inference configuration, prioritizing output speed for latency-sensitive workflows.

Key highlights:

• Up to 2.5x faster output — significantly higher output tokens per second compared to standard Opus 4.7, with no change to intelligence or capabilities
• Same Opus 4.7 model — identical model weights and behavior, not a different or distilled model
• State-of-the-art benchmarks — scores 87.6% on SWE-bench Verified (up from 80.8% on Opus 4.6), 94.2% on GPQA Diamond, and 69.4% on Terminal-Bench 2.0
• 1 million token context window — full access to Opus 4.7's massive context for processing entire codebases and complex datasets
• 128,000 output tokens — generate long-form responses, detailed analyses, and extensive code generation at speed
• Ideal for interactive workflows — rapid iteration, live debugging, real-time agentic tasks, and any scenario where waiting on responses breaks your flow

Fast mode's benefits are focused on output tokens per second, not time to first token. For cost-sensitive or batch workloads, standard Opus 4.7 offers the same intelligence at lower cost.

Examples

Code Generation

puter.ai.chat("Refactor this module to use dependency injection and add proper error handling",
  { model: 'claude-opus-4.7-fast' }
);

Long-Context Analysis

puter.ai.chat([
  { role: "user", content: largeCodebase + "\n\nIdentify performance bottlenecks and suggest optimizations with code examples." }
], { model: 'claude-opus-4.7-fast' });

Streaming

const response = await puter.ai.chat(
  "Design a REST API for a real-time collaboration platform with WebSocket support",
  { model: 'claude-opus-4.7-fast', stream: true }
);

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

Get Started Now

Just add one library to your project:

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

Or 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 4.7 Fast immediately.

Learn more:

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