September rumor list: GPT-6 Sol leads six new models

Shub @shub0414Originally posted 2026.09.21

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September might be the month AI models went completely off the rails The rumored lineup is looking wild: • Anthropic — Claude Opus 5.5 • Google — Gemini 4 Pro • OpenAI — GPT-6 Sol • xAI — Grok 4.7 • Moonshot — Kimi K3.1 • ZAI — GLM 5.5 Not all of these are guaranteed for September, and some could slip into October. But if even half of them land AI Twitter is going to be VERY busy.