GPT-5.4 and GPT-5.4 Pro Are Now Available in Puter.js

Puter.js now supports GPT-5.4 and GPT-5.4 Pro, OpenAI's latest frontier models for complex professional work. Add them to your application for free without needing an OpenAI developer account or API key.

What is GPT-5.4?

GPT-5.4 is OpenAI's most capable and efficient frontier model, released on March 5, 2026. It brings recent advances in reasoning, coding, and agentic workflows to a general-purpose model that excels at professional tasks. Key highlights include:

• 1.05M token context window — the largest context window available from OpenAI
• 33% fewer factual errors per claim compared to GPT-5.2, with overall responses 18% less likely to contain errors
• 83% on GDPval — record score on OpenAI's knowledge work benchmark across 44 occupations
• 47% fewer tokens with the new Tool Search system for tool calling, while maintaining accuracy
• Improved coding from GPT-5.3-Codex, with record scores on computer use benchmarks OSWorld-Verified and WebArena Verified

What is GPT-5.4 Pro?

GPT-5.4 Pro is a higher-compute version of GPT-5.4 that allocates more reasoning time to produce smarter and more precise answers on complex tasks. It supports reasoning effort levels of medium, high, and xhigh, and shares the same 1.05M token context window as GPT-5.4.

Examples

Basic Chat

puter.ai.chat("Create a project plan for building a SaaS dashboard", {
    model: "gpt-5.4"
})

Complex Problem Solving with Pro

puter.ai.chat("Analyze the time and space complexity of this algorithm and suggest optimizations for handling 10M+ records", {
    model: "gpt-5.4-pro"
})

Streaming Responses

const response = await puter.ai.chat(
    "Explain how transformer architectures handle long-context inputs",
    { model: "gpt-5.4", stream: true }
);

for await (const part of response) {
    if (part?.reasoning) puter.print(part?.reasoning);
    else 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 or OpenAI developer account needed. Start building with GPT-5.4 immediately.

Learn more:

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