I’m a C++ developer doing computational geometry. My Claude code performance has run off a cliff the last month. In frustration I looked for another tool that could basically slot into the same workflow (CLI tool, not IDE dependant, yada yada) I decided to try Gemini-CLI with Gemini 3.1Pro. The bench scores seemed close, might be worth a shot. It’s not. It’s shit. Here was my experience:
- You need an API auth to get anything done. I used 27% of my $20 a month subscription on a 21 line code review.
- One day of work cost me $18, and that was doing only one thing, so no parallel tasks.
- When it works, it does a pretty good job. Close to Opus 4.6 in my experience.
- Researching my codebase was way better than Opus, to be fair. It was able to comprehend and seach much faster.
- It has a hard time editing files in a way so that they’re not broken. It will leave random detritus from its’ own edits throughout the file
- It would start processes (builds, edits, testing) without permission
- Ask it a single question about it’s own behavior it will go into a spiral and not answer. I would not recommend this tooling as an alternative to Claude. submitted by /u/Ikbensterdam
Originally posted by u/Ikbensterdam on r/ClaudeCode
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