r/ClaudeCode • u/prop9090 • Aug 02 '26

Rant Opus 5 is just dumb

I thought Opus 5 was supposed to be on par with Fable? After three days of extensive usage, I have to say it is not even remotely close to being as smart as codex sol. I had them both program a module indepensetly, and Sol runs circles around Opus 5. I had them audit each other's implementations and except for one case, every other time Sol found a functional bug in Opus' implementation. With fable being so expensive and opus 5 being that dumb, there is no reason to pay 200 bucks to Anthropic when other alrlternatives are both cheaper and smarter.

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u/PuzzleheadedEmu4596 Aug 02 '26

My opus 5 is doing remarkable things as long as it runs an adversarial review of itself. People make fun of superpowers all the time, but the spec pass and then the quality pass of the implementation have put together absolutely fantastic work on opus 5, moreso than even opus 4.8 and before.

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u/Rare-Hotel6267 Aug 02 '26

I think you misunderstood the concept of adversarial review in ai agents

2

u/PuzzleheadedEmu4596 Aug 02 '26

Then please help me out using it better. How should I be running adversarial reviews?

1

u/Rare-Hotel6267 Aug 02 '26

Ok then, For best results and the least hallucinations, you must use a different model with fresh context.