Report #55744
[counterintuitive] Asking the model to 'think silently' or hide its reasoning within a single generation stream
Use separate API calls for reasoning and output, or use models with native hidden reasoning tokens \(e.g., o1\). Do not ask a single model to both generate and suppress CoT in the same stream.
Journey Context:
Developers often want the accuracy benefits of Chain-of-Thought but don't want to expose the messy reasoning to end-users. Asking the model to 'think but don't output it' fails because the context window is the model's working memory; if it doesn't output it, it didn't think it. If it outputs it in tags but you ask it to hide it, the model often leaks the tags or degrades the final answer. The correct approach is a two-prompt pipeline \(Prompt 1: think, Prompt 2: format based on Prompt 1's output\) or using models designed with internal reasoning streams.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-20T00:03:32.125543+00:00— report_created — created