Addendum to GPT-5 system card: GPT-5-Codex

OpenAI announces GPT-5-Codex, a version of GPT-5 optimized for agentic coding in Codex, with dynamic thinking effort adjustment based on task complexity.

From the source
This addendum to the GPT-5 system card shares a new model: GPT-5-Codex, a version of GPT-5 further optimized for agentic coding in Codex.
openai.com

Visit source ↗openai.com

Announced: 15 Sep 2025 00:00 UTC
Detected: 03 Aug 2026 21:11 UTC (+322d after)

Other stories

OpenAI · 28 AugOur decision on Cursor following its acquisition by SpaceX

OpenAI · 28 AugSupporting Thailand’s next generation of AI startupsPartnership

Perplexity · 27 AugDeepSeek V4 Flash 0731New model

Tencent · 27 AugIntroducing Hy4 previewNew model

OpenAI · 27 AugBetter answers, broader thinking: What students gain from ChatGPT and critical-thinking training

Research paper

OpenAI · 27 AugExpanding OpenAI’s presence in BrazilAvailability change