GPT-5.6 Sub-Agent Behavior Sparks Discussion

grichadev · x · 2026-07-12

This thread discusses the sub-agent behavior of GPT-5.6 Sol across different modes. A user noticed that while running in an xhigh workflow, the model was generating sub-agents under ultra mode. In response, it was clarified that GPT-5.6 Sol only uses subagents in Ultra mode (unless explicitly prompted in other modes), and it was recommended to test under medium / high / xhigh to observe the actual performance at different reasoning efforts.

Related event: GPT-5.6 Subagent Mechanism Sparks Cost and Over-triggering Controversy(5 posts)→

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