GPT-5.3-Codex

Model ● Covered in 3 stories + Follow

GPT-5.3-Codex is tracked in TLDRocket’s model dataset. Explore the recorded developments, relationships and supporting evidence below. Coverage reflects our monitored sources and may be incomplete.

Specifications

No specifications recorded yet.

Latest developments

Other: Anthropic & OpenAI Last Week in AI · 8 months ago · 7 Model release: OpenAI & GPT-5.3-Codex OpenAI · 8 months ago · 6 Model release: OpenAI & GPT-5.3-Codex OpenAI · 8 months ago · 6

Timeline

Month Quarter Year

February 2026

Other: Anthropic & Apptronik Other

Model release: GPT-5.3-Codex & GPT-5.2 Model release

17 Feb Other: Anthropic & OpenAI
5 Feb Model release: OpenAI & GPT-5.3-Codex
5 Feb Model release: OpenAI & GPT-5.3-Codex

Relationships

Products & technology

Derived from GPT-5.2-Codex · 1 source
Derived from GPT-5.2 · 1 source
OpenAI develops this model · 1 source