Is OpenAI's rumored astra/sol/terra/luna lineup a tier system? Users bet luna beats Haiku
JeremyNguyenPhD · x · 2026-09-12
X users are speculating about OpenAI's rumored model naming. haider1 argues astra/sol/terra/luna are tiers mirroring Anthropic's structure — astra=fable, sol=opus, terra=sonnet, luna=haiku — rather than standalone names for each model going forward, pushing back on those who think astra is the new sol.
JeremyNguyenPhD replies that luna is already well above Haiku and wouldn't be surprised if it hits near-Sonnet performance on some benches. All unverified speculation.
Related event: Leaked OpenAI Codex Names Spark Tiering Speculation Mirroring Anthropic(2 posts)→
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