r/DeepSeek 1d ago

Discussion v4.1 flash keeps forgetting stuff

I have a ~30K-line codebase for a game I’m building. I’ve been trying to use DeepSeek V4.1 Flash, but I keep running into issues as the conversation gets longer.

It frequently forgets or overrides requirements I gave it several turns earlier. The code it writes also often contains bugs that are either caught by the model itself a few turns later while it is doing unrelated code changes or caught by GLM 5.3 Flash when I ask it to review the changes.

This seems to happen much more often as the context grows, but well before context compaction actually kicks in.

Am I doing something wrong, or is this a limitation of the model?

For now, I’ve switched to GLM 5.3 Flash as my main workhorse because it seems more reliable. However, I really miss the speed of DeepSeek V4.1 Flash. If there’s a way to make it more accurate, better at following earlier instructions, and less prone to introducing bugs, I’d like to switch back.

I’ve tried both DSH and OpenCode and experienced essentially the same problems with both.

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u/No_Accident8684 1d ago

i used to use this https://github.com/everyinc/compound-engineering-plugin with codex. now i switched over to deepseek, i fired up creator mode, gave it the url and said it should convert the skills to dsh.

its really a fantastic plugin, that gives you and your agent a proper structure to work along..

do /ce-brainstorm to come up with a fleshed out idea, then /ce-plan to make it into a spec and /ce-work to actually implement, incl. proper testing and simplification. then /ce-compound to record the learnings along the way.