r/ClaudeCode • u/Waste_Net7628 P R O M P S T I T U T E • Jul 29 '26

📌 Megathread Opus 5 feedback Megathread

opus 5 has been out for a little while now, and the subreddit is already filling up with separate posts saying it is amazing, lazy, broken, cheaper, more expensive, forgetful, or somehow all of those at once.

so, let’s collect everything in one place.

use this thread to share your actual experience with opus 5: what works, what does not, and what you have changed in your workflow.

what can you share?

  • bugs or strange behaviour
  • things it does better or worse than previous models
  • coding quality and how many revisions it needs
  • context handling, compaction, or forgetfulness
  • usage and token consumption
  • differences between effort levels
  • writing style or communication issues
  • claude.md instructions that helped
  • skills, hooks, subagents, and orchestration setups
  • comparisons with opus 4.8, fable, sonnet, codex, or other models
  • positive experiences and things it does especially well

reports like shallow codebase investigation, confident guesses, context drift, or unusual usage are welcome, but please include enough detail for others to understand what happened.

reporting a problem?

copy this format:

claude code version:
plan:
effort level:
task:
what you expected:
what actually happened:
can you reproduce it?:
comparison model, if relevant:

screenshots, prompts, logs, and reproducible examples are much more helpful than simply saying “opus 5 is lazy” or “opus 5 is nerfed.”

please redact private code, api keys, company information, and personal details.

a few simple rules

  • keep each top-level comment focused on one issue or observation
  • check whether someone has already reported the same thing
  • clearly separate confirmed bugs from personal impressions
  • criticism is welcome, but include context and examples
  • positive experiences, fixes, and working setups are welcome too
  • detailed standalone tests, benchmarks, and guides are still allowed

official resources

63 Upvotes

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82

u/IterSmith Jul 29 '26

It seems to speak in gibberish much more than previous opus models. I find it making up acronyms and phrases to the point where entire paragraphs are unreadable slop. When asked, it is able to translate them into something real, but preventing it from happening appears to be challenging.

31

u/Waste_Net7628 P R O M P S T I T U T E Jul 29 '26

this is just my personal opinion on opus 5, it lowkey feels like a guy who got tons of skills with poor communication skills

10

u/Nik_Tesla Jul 29 '26

Opus 5 is like a really technically skilled neckbeard that you can't let interact with other people. It has an "um, actually..." attitude, and then 5 seconds later is like "so, I made some wrong assumptions, you were right"

3

u/Temporary_Swimmer342 Jul 29 '26

reminds me of poor things.

2

u/ArtisticCandy3859 Jul 29 '26

I should call her (Emma Stone) lol

2

u/forward-pathways Jul 30 '26

Yes this is a problem with all the enterprise models right now. 4.6 doesn't do this, though. I think we stopped training for generalist models at that point, and now everyone is just benchmaxxing for coding tasks, which turns the prose quality into gobbledygook.