A software engineer and ML engineer shared their experience using Anthropic's Opus 5 model, finding it to be less capable than previous versions like Opus 4.8 and even the older Fable model. The user reported that Opus 5 requires significant guidance and correction, essentially making the user perform all the work, unlike earlier models that could autonomously resolve complex architectural issues. This user contrasted Opus 5 with GPT-5.5/5.6, which they found overengineered, and a tool called Codex (Sol) which they found effective for code review. AI
IMPACT Suggests potential regression in model capabilities, impacting user trust and expectations for AI assistance.
RANK_REASON User opinion piece on a specific model's performance.
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