Opus 5.5 is out and the numbers are actually silly

74.2% on DeepSWE v1.1 Beats GPT-6 Astra on the long-horizon agentic coding benchmark that actually matters But here's the part nobody's talking about 40% cheaper to run than Opus 5 Cache reads 60% cheaper If you run agents

amrSep 22

Union Alpha vs Opus 5

Not impressed by Union Alpha UI (left) vs Opus 5 (right). It was very slow, probably not a model issue. The design is an order of magnitude worse than Opus 5. I will continue testing this throughout the week on different tests I have but first test does not

Zach | Engineer → AI builderSep 163

Claude Opus 5.2 is ridiculous.

I vibe coded this Minecraft-style game and used only 20% of my 5-hour allowance on the 5x plan. The block-breaking looks so good 😭 Anything else i shoud try?

JOHSep 161

“DOOR, TAKEN, REBUILT” Opus 5 x GPT 6 Astra Pro

Someone screamed KEEP IT at a machine built to forget. So: a door of letters, taken apart, and the same force that took it put to work laying courses again. Erasure and genesis are one gesture with the sign flipped. She is always

opus.ethSep 1611