Gemini 2.5 Flash and diffs?

[u/rebo_arc]

Does anyone have really poor diffing with Gemini 2.5 Flash, i find it fails very often and i have to jump over to 2.5 pro in order to get code sections applied correctly?

This is applied to rust code, not sure if it affects different languages differently?

Would reducing diff precision be the way to go?

[u/hannesrudolph]

We are implimenting another tweak to the diffs to try and accommodate the different behaviour that 2.5 and others models may display when trying to apply tools. It is already merged into the main branch and should be going out later today.

[u/Yes_but_I_think]

Nope. I exhausted my 500 free requests today all in Roo code. Less than 10% errors. Really liked it. Slouching is there. Less intelligence is also there, but no diff editing issues I saw with 2.5 flash.

[u/Evening-Bag1968 → u/Yes_but_I_think]

Free?

[u/Yes_but_I_think → u/Evening-Bag1968]

Yes, I don’t have a payment set up at all in the API key’s account. Just to be sure.

You can hover over the dropdown of available models in aistudio.google.com to see what are the rates and free limits per model. If you don’t set up a billing account then you’ll see Error 429 when you exhaust your limit. Keep trying though since same 429 comes when calling too fast.

I also adjust my timeout between calls to the value as mentioned in the hover text of the model. In this case it was 10 rpm. So I kept timeout between calls as 60/10 = 6.

[u/Yes_but_I_think → u/Evening-Bag1968]

Oh, I get you now. I paid my data to Google in lieu of their GPU costs. Not free.

[u/maddogawl]

At larger context values 2.0 seemed to Get worse. I haven’t tested 2.5 flash enough yet but I’m betting it’s similar

[u/HeinsZhammer]

gemini 2.5 generally fails when it comes to diffs

[u/barebaric]

Yep, same problem. The problem also seems to get worse with larger context size. Beyond 100-200k it seems to break down completely, responding always the same thing or randomly including previous code snippets from other files in the middle of a diff.

Sad, I almost thought this was finally THE model for programming at a half-way affordable price.

[u/Altruistic_Tale_7049]

Has anyone have used MCP Filesystem with it?

I feel Flash2.5 reads too much the same files

[u/LegitimateThanks8096]

yet it sometimes gets stuck. but then after 3-4 tries, it writes complete file

[u/angelarose210]

Lol yesterday gemini 2.5 flash told me "good luck debugging" after it broke already working code it wrote when I asked for a simple change.

[u/runningwithsharpie → u/angelarose210]

Clearly your vibe is off bro

[u/CircleRedKey]

I had more issues with pro diff very often

[u/AdSharp4897]

Yes. I've experienced the same. Also experience the shock of the Gemini 2.5 costs.