Ultra and Ultracode look like xHigh-effort versions of Fable and Sol 5.6, with Pro exposed via API

emollick · x · 2026-07-24

People are saying Ultra and Ultracode are basically xHigh effort versions of Fable and Sol 5.6, spawning even more high-effort agents. The post also notes that Pro is available through the API, but says the naming still makes everything more confusing.

Related event: GPT-5.x Pro Leads Technical Tasks as Competitors Face Criticism(2 posts)→

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