Rumored GPT-6 'Bel' from OpenAI to face off against Anthropic's Fable 5.5 lineup
CurieuxExplorer · x · 2026-10-03
Unverified rumors circulating on X claim OpenAI is set to release a model codenamed GPT-6 Bel, with Anthropic answering via its Fable 5.5 drop. The poster speculates Fable, Opus 5.5, and Sonnet 5.5 will top every leaderboard, calls Haiku 5.5 a potential wildcard, and argues Codex must respond with Bel or Claude will dominate. Neither company has confirmed anything.
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