[DominikPeters]

Are you using Opus 4.5? Sounds more like Sonnet.

[twa927]

Yes I'm using Sonnet 4.5. Thanks for the tip, will try Opus 4.5, although costs might become an issue.

[TuxSH]

> although costs might become an issue.

If you have a ChatGPT subscription, try Codex with GPT-5.2-High or 5.2-codex High? In my experience, while being much slower, it produces far better results than Opus and seems even more aggressively subsidized (more generous rate limits).