Requests to Gemini 3.7 Flash now go to 3.8 Flash without asking
The Gemini API changelog entry for 8 October deprecates gemini-3.7-flash and states that all requests to it are automatically routed to gemini-3.8-flash. The old model name still works; it just no longer means what it says.
Silent routing is the most invisible kind of model change: an integration that pinned 3.7 Flash keeps running, keeps being billed, and quietly answers differently from this week. That is fine on the vendor's terms and terrible for yours if you ever compared two tools on 3.7's behaviour. For subscribers it means the same thing as the September gate on 2.5 — the model named in a tool's copy resolves to whatever the vendor's routing table points at now, which is worth asking about when an answer suddenly reads worse.