Codex Sub-Agent Differences Traced to Training and System Prompts

Discussions reveal that differences in model behavior within Codex, especially regarding sub-agent usage, primarily stem from training methods and the system prompt. Developers are advised to verify their system prompts against Codex's default configurations when using custom harnesses.

2026-07-12 ~ 2026-07-12 · 3 related posts

• Double-Check System Prompts in Custom Harnesses — pvncher · 2026-07-12
• Codex Sub-Agent Behavior Sparks Debate — zeeg · 2026-07-12
• Codex Sub-Agent Differences Stem From Training — pvncher · 2026-07-12