How I AI · Tuesday, September 22, 2026
The new Claude Opus 5.5 model is noted for its improved speed, with the speaker experiencing frustration with the slowness of Opus 5. While generally zippier, a caveat exists where the model can become unexpectedly quiet during longer interactions, leading to perceived latency.
“Actually, I found myself accidentally testing Opus 5 versus 5.5, and I was so frustrated with how slow Opus 5 is. Opus 5.5 does feel zippier. It's responsive, except for in one exception. I'll tell you what that is in a minute.”
“And so instead of like narrating itself in this really obnoxious Claude way, it would just not talk to me for like eight, nine minutes. So while the model was fast, it did not feel fast on longer turns because it was so quiet.”