OpenAI: GPT-5.3 Chat
openai/gpt-5.3-chat
Access GPT-5.3 Chat from OpenAI using Puter.js AI API.
Get Started// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain quantum computing in simple terms", {
model: "openai/gpt-5.3-chat"
}).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", {
model: "openai/gpt-5.3-chat"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
# pip install openai
from openai import OpenAI
client = OpenAI(
base_url="https://api.puter.com/puterai/openai/v1/",
api_key="YOUR_PUTER_AUTH_TOKEN",
)
response = client.chat.completions.create(
model="openai/gpt-5.3-chat",
messages=[
{"role": "user", "content": "Explain quantum computing in simple terms"}
],
)
print(response.choices[0].message.content)
curl https://api.puter.com/puterai/openai/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_PUTER_AUTH_TOKEN" \
-d '{
"model": "openai/gpt-5.3-chat",
"messages": [
{"role": "user", "content": "Explain quantum computing in simple terms"}
]
}'
Model Card
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
Model Playground
Try GPT-5.3 Chat instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
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Frequently Asked Questions
You can access GPT-5.3 Chat by OpenAI through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.
Yes, it is free if you're using it through Puter.js. With the User-Pays Model, you can add GPT-5.3 Chat to your app at no cost — your users pay for their own AI usage directly, making it completely free for you as a developer.
| Price per 1M tokens | |
|---|---|
| Input | $1.75 |
| Output | $14 |
GPT-5.3 Chat was created by OpenAI and released on Mar 3, 2026.
GPT-5.3 Chat supports a context window of 128K tokens. For reference, that is roughly equivalent to 256 pages of text.
GPT-5.3 Chat can generate up to 16K tokens in a single response.
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.
Get started with Puter.js
Add GPT-5.3 Chat to your app without worrying about API keys or setup.
Read the Docs View Tutorials