AI Model
GPT 5.3 Codex Spark
byOpenAI
Released on February 13, 2026
Release Summary
OpenAI's fastest coding model yet. Built on the Codex line, Codex Spark prioritizes speed and low-latency responses while retaining strong coding performance - ideal for real-time pair-programming and interactive development workflows.
Timeline
February 13, 2026
GPT-5.3 Codex Spark released
OpenAI launches Codex Spark, a dramatically faster variant of GPT-5.3 Codex optimized for speed and real-time coding assistance.
February 5, 2026
GPT-5.3 Codex released
OpenAI releases GPT-5.3 Codex, the full-size coding model that precedes the lighter Spark variant.