Theo - t3.gg(@theo):Why does Opus 5.5 feel practically unlimited when Fable 5.1 was so heavily limited? It's a combination of two things: Opus's efficiency, and the 50% limit on Fable. Claude Code subs are very generous with their usage, but only half is allowed to be used by Fable. Separately, Opus is way more gentle with costs. Opus 5.5 on High is over 2x cheaper than Fable 5.1 High. The result is that, roughly, going from Fable 5.1 high to Opus 5.5 high is a 4.3x increase in limits. Fable 5.1 xhigh to Opus 5.5 high (move I made) is a 6.6x increase 🤯

Theo - t3.gg

@theo

Full time CEO @t3dotcodes & @t3dotchat. Part time YouTuber, investor, and developer

参加 October 2016

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Theo - t3.gg@theo

2026.09.27 22:36

Why does Opus 5.5 feel practically unlimited when Fable 5.1 was so heavily limited? It's a combination of two things: Opus's efficiency, and the 50% limit on Fable. Claude Code subs are very generous with their usage, but only half is allowed to be used by Fable. Separately, Opus is way more gentle with costs. Opus 5.5 on High is over 2x cheaper than Fable 5.1 High. The result is that, roughly, going from Fable 5.1 high to Opus 5.5 high is a 4.3x increase in limits. Fable 5.1 xhigh to Opus 5.5 high (move I made) is a 6.6x increase 🤯