Summary
The company says separating the models lets each improve at its own tempo, or speed of development.
Anthropic’s Fable series, which recently returned for all users, is being used as a benchmark to see which set of models performs better.
Three OpenAI models: Sol (highest capability), Terra (mid‑range), Luna (entry level).
Each model is sold at a different price and can be updated independently.
Performance comparisons are ongoing between OpenAI’s models and Anthropic’s Fable series.
The company says separating the models lets each improve at its own tempo, or speed of development.
Anthropic’s Fable series, which recently returned for all users, is being used as a benchmark to see which set of models performs better.
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