With GPT-5.3-Codex, OpenAI Pitches Codex for More Than Just Writing Code

Summary

OpenAI released GPT-5.3-Codex on February 5, 2026, a new version of its frontier coding model available via command line, IDE extension, web interface, and a new macOS desktop app. The release came within minutes of Anthropic's Claude Opus 4.6 launch — the two companies had originally planned simultaneous 10 a.m. PST releases, but Anthropic moved its announcement 15 minutes earlier. GPT-5.3-Codex outperforms GPT-5.2-Codex and GPT-5.2 on SWE-Bench Pro and Terminal-Bench 2.0 benchmarks according t