OpenAI Releases GPT-5.3-Codex-Spark
GPT-5.3-Codex-Spark
- Release Date
- 2026-02-12
- Availability
- Research preview for ChatGPT Pro users
- Access Points
- Codex app, CLI, VS Code extension
- Context Window
- 128k tokens
- Hardware
- Cerebras Wafer Scale Engine 3
OpenAI released GPT-5.3-Codex-Spark, a smaller, text-only model optimized for real-time coding with over 1000 tokens per second and a 128k context window. It is available in research preview for ChatGPT Pro users via the Codex app, CLI, and VS Code extension, running on Cerebras hardware.