OpenAI Launched GPT-5.3-Codex-Spark
On February 12, OpenAI released GPT-5.3-Codex-Spark, a lightweight coding model optimized for real-time development.
It is OpenAI's first production model running on non-Nvidia silicon - specifically Cerebras' Wafer Scale Engine 3.
The model delivers over 1,000 tokens per second, making it feel near-instant for interactive coding tasks like editing, debugging, and UI iteration.
This marks the first milestone of a multi-year, $10 billion partnership between OpenAI and Cerebras announced in January.
Currently available as a research preview for ChatGPT Pro users, Codex-Spark has a 128k context window and is text-only at launch.
It is OpenAI's first production model running on non-Nvidia silicon - specifically Cerebras' Wafer Scale Engine 3.
The model delivers over 1,000 tokens per second, making it feel near-instant for interactive coding tasks like editing, debugging, and UI iteration.
This marks the first milestone of a multi-year, $10 billion partnership between OpenAI and Cerebras announced in January.
Currently available as a research preview for ChatGPT Pro users, Codex-Spark has a 128k context window and is text-only at launch.
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