Rumor roundup: GPT-6 Sol/Luna may launch this week

Leon Lin @LexnLinOriginally posted 2026.09.21

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damn so basically: - gpt 6 sol/luna probably this week (no terra anymore) - New Fable, Opus and Sonnet 5.5 - Opus 5.5 very very soon released - Haiku gone as well - We will maybe see Bel later this year - Astra 6.1 will compete with Fable 5.5 - Kimi K3.1 this week - Grok as well but 4.7 is not that good