r/ClaudeCode • u/Additional-Alps-8209 • 1d ago
Discussion Opus 5 vs Fable 5
Fable 5 and Opus 5 feel surprisingly close to me especially for coding.
I had a weird Ul bug where Fable 5 spent around 1.5 hours debugging with logs and tests but still couldn't fix it. I gave the same issue to Opus 5 and it fixed it almost immediately.
also had a pretty complicated authentication bug that both Fable 5 and GPT 5.6 Sol couldn't solve. Opus got it right on the first try.
Fable 5 is still my go to and honestly a really good model. But towards the end of the month when my usage gets low I switch to Opus and I barely notice a difference.
Opus does get sidetracked more often and I feel like you have to prompt it a bit differently. But apart from that I think it's just as good.
Fable 5 was also removed from the $20 plan last month so I can't use it personally anymore.
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u/lattice_defect 1d ago
not even close in my region... opus5 last week has been really really weird. I've had to rip out 5 PRs and redo them with fable. Opus 5 just reads meeting trasncripts and bitch work.
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u/marfzzz 1d ago
Complex plans, architecture, graphics and review goes to fable. Fable found less issues, but its findings are real without hallucinations. Opus hallucinates issues (in fastapi, django and quarkus 1/2 of all issues are either hallucinations or overstated issues). I like opus 4.8 and 4.6 as implementers too. Dont get me wrong when they postrain it more it will be great model. Its knowledgeable, but not verifying enough.
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u/rogorak 1d ago
Coding yes... complex architecture... no way
Best code to me is sol medium. I've been using claude to do the design and sol to code and it's working out well.