Will OpenAI have the second highest OpenRouter market share the week of October 19?

Analysis

The latest OpenRouter Market Share reading puts OpenAI third. For the week beginning October 12, 2026, the page shows DeepSeek at 24.4%, Google at 19.7% and OpenAI at 18.5%. That is the most recent complete week displayed, and the chart notes usage data through October 20. One secondary write-up cites October 18 for the same week, so the exact cutoff is unclear. The limitation matters. The deciding source was read on October 21 and does not yet publish the figure this question turns on, which is the second-ranked entry for the week of October 19 to 25. Nothing cited from elsewhere is that figure. The forecast leans against OpenAI because Google sat ahead of it in the latest week, by 1.2 points on the chart. Earlier readings are context only and are mixed. One news report on the week of October 5 to 11 had OpenAI at 18.6%, second, ahead of Google at 17.8%. A separate write-up of the week beginning September 28 had Google at 21.5% and OpenAI at 18.2%. So OpenAI and Google have traded places in the readings supplied, and the gap is narrow. That is why this is a lean and not a certainty. A single week's reshuffle could put OpenAI back in second. The thing to watch is the first display of the October 19 week on the chart, specifically whether Google's share holds above OpenAI's.