WHAT NEW IN X10.31 SAT

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Opus 5.5 ships with higher subscription usage and cheaper cache reads

Opus 5.5 is about 30% faster and 40% cheaper per task than Opus 5, with cache reads 60% cheaper, and Pro, Max and Team users get a usage reset and a 20% higher 5-hour limit.

0xbobaa
@0xbobaaaArchived 2026.09.24Originally posted 2026.09.23
0xbobaa @0xbobaaaOriginally posted 2026.09.23
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OPUS 5.5 LANDED AND THE BENCHMARK ISN'T THE STORY. THE SAME SUBSCRIPTION NOW BUYS 25% MORE WORK, AND THE 5-HOUR LIMIT WENT UP 20% TODAY what changed: > fable 5.1 level on most tasks, ~30% faster and ~40% cheaper per task than opus 5 > cache reads 60% cheaper, which is where long agent runs bleed > thinking is always on. medium is the default, effort is a dial you turn per job > pro, max and team got a usage reset sitting in settings -> usage, good until oct 22 > fast mode goes up to 2.5x at $8/$40 when you need the answer now what people shipped with it in the first hours: > a 13,081-tile mosaic drawn and animated in code, no image files > an animation with every frame painted in javascript, one shot in 18 minutes 31 seconds > minecraft running in a browser > a windmill modeled, rigged, textured and animated in blender in 15 minutes > an xbox controller in 334 lines of one-shot svg it's also their first model since they called for pacing the frontier. metr and frontier design tested it before release, and it posted their strongest alignment score to date tonight: apply the reset, put effort on high for the one job you normally babysit, and let compaction carry the long run

This post quotes another post: x.com/0xbobaaa/status/2081658689853829427

x.com/0xbobaaa/status/2102699447708700734Archived 2026.09.24 10:31