How do the Pro models compare to their standard versions?

Luna Pro gains seven percentage points over standard Luna, while Terra Pro reaches 28.5 percent (nearly matching standard Sol at 28.7 percent). Sol Pro gains less than three points over standard Sol, showing that the Pro boost is larger for weaker tiers.

Will these Pro models actually be released in ChatGPT?

It is unclear. The three Pro variants appear only in the benchmark results table; the paper does not confirm they will ship as a product in ChatGPT.

Large Language ModelsAI Business & IndustryTHE DECODERJul 1, 2026Jul 1, 2026, 22:00 JST

OpenAI unveils three-tier Pro models for ChatGPT in benchmark paper

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3 Key Points

What happened
OpenAI's genomics benchmark paper reveals Pro variants of its GPT-5.6 models for the first time—Luna Pro, Terra Pro, and Sol Pro—mirroring the standard three-model lineup. Sol Pro achieved a 31.5 percent pass rate, beating standard Sol at 28.7 percent and Claude Opus 4.8 at 16.0 percent.
Why it matters
ChatGPT Pro has always been a single top-tier tier above everything else. This three-model structure would let users choose between speed, throughput, and maximum reasoning power based on their needs, fundamentally changing how the Pro subscription works. For businesses, it may offer a middle option (Terra Pro) that performs nearly as well as the standard flagship while handling higher volumes.
What to watch
The paper reveals the Pro variants only in its benchmark results table; whether this structure will actually ship in ChatGPT remains unclear. OpenAI did not disclose token usage figures for the Pro models, making it impossible to compare their computational cost against the standard tiers.

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FAQ

How do the Pro models compare to their standard versions?: Luna Pro gains seven percentage points over standard Luna, while Terra Pro reaches 28.5 percent (nearly matching standard Sol at 28.7 percent). Sol Pro gains less than three points over standard Sol, showing that the Pro boost is larger for weaker tiers.
Will these Pro models actually be released in ChatGPT?: It is unclear. The three Pro variants appear only in the benchmark results table; the paper does not confirm they will ship as a product in ChatGPT.

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