Using Claude Code or the web UI? If when using Claude Code, you may need to break your codebase up into smaller chunks to help.

That said, there's no fucking way I am getting what they claim w/Opus in hours. I may get two to three queries answered w/Opus before it switches to Sonnet in CC.

Claude Code cli. Yeah, I gave up on Opus as I deed it switches really fast (200 sub). I made my own flow tooling and prompting which uses way less than it does on its own, but I still hit the limits.