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[ARTICLE · art-76348] src=twitter.com ↗ pub= topic=large-language-models verified=true sentiment=↓ negative

"Opus 5 is a really bad model"

A user who previously preferred GPT over Claude criticizes Anthropic's Opus 5 model as 'awful' and a 'slop-cannon,' claiming it fails to deliver on explicit goals, makes bad decisions and large mistakes, and wastes tokens by chasing irrelevant engineering concerns.

read1 min views1 publishedJul 28, 2026
"Opus 5 is a really bad model"
Image: source
  • i feel like i’m being lied to here. i’ve been the biggest gpt > claude guy. but sol is pathetic. it makes every task into a token chugging monster and fails to deliver on my explicit goal, instead chasing random engineering concerns outside of the scope.
  • its /awful/, Opus-5 makes me feel like setting my hair on fire out of frustration. it's annoying to work with for high tasks: it constantly makes bad decisions and large mistakes so any token-usage you saved by not using Fable instead is useless/worse. It's a slop-cannon.
source & further reading
twitter.com — original article
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