GPT-5.3-Codex-Spark
OpenAI · 2026-02-12
GPT-5.3-Codex-Spark is OpenAI's research-preview model for near-instant, real-time coding in Codex and a smaller version of GPT-5.3-Codex. At launch, it was text-only with a 128,000-token context window and ran on Cerebras low-latency hardware.