openaiVision
OpenAI: GPT-5.3-Codex
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
Context
400k tokens
Input / 1M tokens
$1.75
Output / 1M tokens
$14
Benchmark
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Pricing
Input tokens$1.75 per 1M tokens
Output tokens$14 per 1M tokens
Cache read$0.17 per 1M tokens
Technical details
Model IDopenai/gpt-5.3-codex
Context window400k tokens
Input modalitiestext, image, file, pdf
Output modalitiestext
TokenizerGPT
Max output tokens128,000
Use with MegaBrain
import OpenAI from 'openai'
const client = new OpenAI({
baseURL: 'https://getmegabrain.com/api/gateway/v1',
apiKey: process.env.MEGABRAIN_API_KEY,
})
const response = await client.chat.completions.create({
model: 'openai/gpt-5.3-codex',
messages: [{ role: 'user', content: 'Hello!' }],
})Ready to use OpenAI: GPT-5.3-Codex?
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