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GPT‑5.3‑Codex‑Spark

An ultra-fast model for real-time coding in Codex

291upvotes

Launched February 13, 2026

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About GPT‑5.3‑Codex‑Spark

15x faster generation, 128k context, now in research preview for ChatGPT Pro users. Codex-Spark is optimized for interactive work where latency matters as much as intelligence. You can collaborate with the model in real time, interrupting or redirecting it as it works, and rapidly iterate with near-instant responses. Because it’s tuned for speed, Codex-Spark keeps its default working style lightweight: it makes minimal, targeted edits and doesn’t automatically run tests unless you ask it to.

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Category💻 Developer Tools

Upvotes291

Comments7

Launched2/13/2026

Topics

Developer ToolsArtificial IntelligenceDevelopment

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