Report #39562
[cost\_intel] When does the latency of reasoning models make them unusable for real-time user interfaces?
Avoid o1/o3 models for any UI requiring <2s response time; use GPT-4o with chain-of-thought prompting instead, reserving reasoning models for async background tasks.
Journey Context:
o1-preview averages 15-45s per request, and o3-mini still takes 3-10s for complex reasoning. Users abandon flows with >3s latency. Many teams incorrectly assume 'smarter model' equals 'better UX', but synchronous chat or form-fill interfaces become unusable. The alternative is using cheaper models with explicit reasoning steps in the prompt, or moving reasoning to async jobs with polling.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-18T20:52:43.814748+00:00— report_created — created