OpenAI: GPT-5.3 Chat

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GPT-5.3 Chat is OpenAI's latest conversational model update (also known as GPT-5.3 Instant), designed to make everyday ChatGPT interactions smoother and more natural. It reduces hallucinations by up to ~27%, cuts down on overly cautious refusals and 'cringe' preachy tone that plagued its predecessor GPT-5.2 Instant, and better integrates web search results with its own knowledge.

Context Window 128K

tokens

Max Output 16K

tokens

Input Cost $1.75

per million tokens

Output Cost $14

per million tokens

Release Date Mar 3, 2026

Code Example

Add AI to your app with the Puter.js AI API, no API keys or setup required.

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

puter.ai.chat("Explain quantum computing in simple terms").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").then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

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GPT-6.1 Sol Pro

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GPT-6 Sol

GPT-6 Sol is OpenAI's mid-tier model in the GPT-6 family, released September 22, 2026 as a faster, cheaper counterpart to the flagship GPT-6 Astra, built on the same training methods. OpenAI positions it for complex development work that developers run repeatedly, such as building features, reviewing code, debugging, and analyzing data. OpenAI reports Sol scoring 68.8% on the DeepSWE 1.1 coding benchmark, 60.5% on OSWorld 2.0 for computer use at xhigh effort, and 56.4% on Agents' Last Exam, a test of professional work across 55 sub-industries. The company says Sol makes about half as many factual errors as GPT-5.6 Sol, approaching Astra-level reliability at a lower cost. At $2 per million input tokens and $10 per million output tokens, half of GPT-5.6 Sol's rate, Sol matches Claude Sonnet 5's standard pricing, though no published benchmark compares the two models directly.

Frequently Asked Questions

How do I use GPT-5.3 Chat?

GPT-5.3 Chat is no longer available through Puter.js. Explore other AI models for alternatives.

What is the pricing for GPT-5.3 Chat?

GPT-5.3 Chat costs $1.75 per 1M input tokens and $14 per 1M output tokens.

	Price per 1M tokens
Input	$1.75
Output	$14

Who created GPT-5.3 Chat?

GPT-5.3 Chat was created by OpenAI and released on Mar 3, 2026.

What is the context window of GPT-5.3 Chat?

GPT-5.3 Chat supports a context window of 128K tokens. For reference, that is roughly equivalent to 256 pages of text.

What is the max output length of GPT-5.3 Chat?

GPT-5.3 Chat can generate up to 16K tokens in a single response.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the GPT-5.3 Chat 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.

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