Users Question Opus 5 Quality, Compare It to 'GPT-OSS', Speculate on Training Issues

arthurcolle · x · 2026-08-16

Users criticize Anthropic's Opus 5 model for being the 'GPT-OSS' of the Anthropic lineup, suggesting the Opus and Sonnet series have lost significance. The author speculates that Anthropic might be unaware of Opus 5's training anomalies despite widespread discussion on Twitter.

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