OpenAI API exposes GPT-5.3-Codex-Spark through model ID gpt-5.3-codex-spark. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.
Last refreshed 2026-06-04. Next refresh: weekly.
Quick Start
- 1
- 2Use the OpenAI API SDK or REST API to call
gpt-5.3-codex-spark— see the documentation for request format.
Code Examples
Install
pip install openaiAPI key
OPENAI_API_KEYModel ID
gpt-5.3-codex-sparkUse the model slug directly, e.g. "gpt-4o" or "gpt-4.1-mini".
import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(
model="gpt-5.3-codex-spark",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Pricing on OpenAI API
Capabilities
JSON / Tool useStructured OutputsCode Execution
About GPT-5.3-Codex-Spark
ChatGPT Pro research preview using Cerebras hardware for real-time coding at 1000+ tokens/second. Not available as a standard public OpenAI API model.
Model Specs
Released2026-02-12
Context131k
ArchitectureDecoder Only