Claude Opus 4.8

“Complicated and custom business logic for my self developed ERP/logistics System with Opus 4.8. It took a weekend and produced nothing, got lost in tangents and made me very pissed.”

“Currently the only models affected are Opus 4.8 and Opus 5”

“The bug was never resolved during those days after countless of sessions in Claude Code.”

“Opus 4.8 was good then Fable 5 was out. Was expensive but it was REALLY a frontier model on its own. Super capable. Stellar. A dream really.”

“I still switch back to Opus 4.8 from time to time”

“I was perfectly happy with Opus 4.8”

“Claude Opus 4.8 scored 85.0, with only a 4-point gap, and even surpassed Gemini 3.1 Pro”