Next month's rumored model list, ranked by evidence strength
The author sorts six rumored models by how strong the evidence is, noting Gemini 4 Pro has real Arena checkpoint outputs but still no model card or API ID.
📋 THE "EVERYTHING DROPS NEXT MONTH" LIST GOING AROUND ISN'T WRONG, BUT IT'S NOT ONE TIER OF CONFIDENCE EITHER Here's the same six names, sorted by how solid the ground actually is right now. Actually has a leak trail: Kimi K3.1 — a named leaker says it's already in post-training, October window. Moonshot also just reopened subscriptions on Sept 18, which lines up with a launch push. Real signal, single source. GPT-6 Sol — separate budget tier of the GPT-6 lineup, not a quality upgrade over Astra, a faster/cheaper one. DevDay Sept 29 is the rumored window. Gemini 4 Pro — the Arena checkpoint story we've been tracking. Outputs look real. Still zero model card, zero API id as of today. Thin or single-source: Grok 4.8/4.7 — notice the list itself can't even settle on a number. That's usually a sign nobody has an actual spec sheet, just Musk timeline posts. GLM 5.5 — per the latest tracking, no model card, no weights, no confirmed name. What's circulating is people comparing against GLM-5.3 because 5.5 doesn't exist to test yet. Basically vibes: Claude Opus 5.5 — no leak trail resembling the other five. This one looks like someone filled out the format rather than reporting something. None of this means the list is fake. It means "dropping next month" is doing six different amounts of work depending which line you're reading. Screenshot this, check back in four weeks, see which ones actually had a model card behind them.