OpenAI
Online
New
GPT-5.3 Codex
Optimized for code generation and technical tasks. Cost-efficient choice for developer workflows.
Model ID: tokenfast/gpt-5.3-codex
Specifications
Context Window
128K tokens
Max Output
16.4K tokens
Input Price
$1.58 / 1M
Output Price
$12.60 / 1M
Capabilities
Chat
Code
Functions
JSON Mode
Price Comparison
See how much you save compared to official pricing.
| Metric | Official Price | Our Price | Savings |
|---|---|---|---|
| Input (per 1M tokens) | $1.75 | $1.58 | 10% off |
| Output (per 1M tokens) | $14.00 | $12.60 | 10% off |
Quick Start
Use this model via our OpenAI-compatible API endpoint.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.yourdomain.com/v1",
apiKey: "sk-your-api-key",
});
const response = await client.chat.completions.create({
model: "tokenfast/gpt-5.3-codex",
messages: [
{ role: "user", content: "Hello! What can you help me with?" },
],
max_tokens: 1024,
});
console.log(response.choices[0].message.content);Pricing Summary
Input$1.58 / 1M
Output$12.60 / 1M
Provider
OpenAI
AI research and deployment company behind GPT-4o, o3, and the DALL-E image generation models.
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