Did September's model updates quietly break agent flows? One user starts logging failure rates

Ok-Independent3290 · reddit · 2026-09-21

A prosumer on top tiers reports that after September's wave of model updates, a previously rock-solid agent flow has started missing steps and needing more retries. They can't tell whether it's real degradation, prompt drift, or priming from online chatter — so they've started logging per-flow failure rates to argue from data instead of vibes, and ask whether others are actually measuring increased agent flakiness since the updates.

Related event: Developers report agents getting flaky after September model updates(2 posts)→

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