Gemini 4 Argon, Fable 5.5 and GPT-6.1 models could launch the week of October 5, 2026

A user expects a busy week beginning October 5, 2026: a public release of Google’s Gemini 4 Argon, Anthropic’s Fable 5.5 and Haiku 5.5, and OpenAI’s GPT-6.1 Sol Ultrafast and GPT-6.1 Astra. They also suggest news on xAI’s Grok 4.8 and Moonshot’s Kimi K3.1 is possible. Despite calling recent leaks unreliable, the user predicts Fable 5.5 will come out ahead of other models released this year.