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GPT-5.3-Codex-Spark

12 February 2026

GPT-5.3-Codex-Spark from OpenAI, language model published 2026-02-12. Notable for: discretionary.

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Abstract

Today, we’re releasing a research preview of GPT‑5.3‑Codex‑Spark, a smaller version of GPT‑5.3‑Codex, and our first model designed for real-time coding. Codex-Spark marks the first milestone in our partnership with Cerebras, which we announced in January⁠. Codex-Spark is optimized to feel near-instant when served on ultra-low latency hardware—delivering more than 1000 tokens per second while remaining highly capable for real-world coding tasks.

Sources: Epoch AI. This entry was generated from a dataset and has not been edited by hand.