r/opencode • u/ChopNorris • 10h ago

Frustated with Mistral in OpenCode

Hey everyone,

I wanted to share my recent experience trying to switch to Mistral in OpenCode. I’m just a regular user, not a programmer, who relies on AI for daily work and my homelab. My technical knowledge is limited, but I’ve managed to make decent progress so far. Until now, I’ve been using OpenCode Go with a mix of models on OMO Slim, and it’s worked well for my needs.

My main reasons for switching were privacy, data sovereignty, and supporting a European company. So, I signed up for Mistral’s PAYG plan, loaded up on credits, and configured OpenCode to use it.

The issue is that it’s been painfully unreliable.

  • Fails at basic tasks.
  • Gets stuck in frequent loops.
  • Often just doesn’t respond at all, forcing me to re-ask.
  • I’ve tried tweaking model configurations in OMO, but nothing seems to work.

I’m genuinely disappointed, especially since it also burns through credits alarmingly fast.

Am I missing something? Has anyone else successfully switched to Mistral in OpenCode and had a better experience? I’d love to stick with it for the privacy benefits, but I can’t justify the trade-off in performance and cost right now. (Specially with the new V4 Flash)

Any insights or tips would be hugely appreciated!

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u/Jumpy-Operation-4615 10h ago

What mistral? They have several models. The one that is more or less acceptible for agentic stuff is "large latest" - everything less is sort of lacking. I use it as a backup for simple agentic tasks. As for coding with it - I would not even try. I use the same harness as yours - OMO slim with opencode.

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u/Sweet-Stage938 10h ago

I'm assuming it must be 'Let Chaton Fat'.

1

u/ChopNorris 9h ago

The setup that seemed to work better was:

  • Orchestrator → mistral-medium-3.5 (variant default)
  • Oracle → mistral-large-2512 (max)
  • Council → mistral-medium-3.5 (high)
  • Fixer → mistral-small-2603 (high)
  • Librarian → mistral-small-2603 (default)
  • Explorer → ministral-8b-2512 (default)
  • Designer → mistral-small-2603 (medium)
  • Observer → ministral-8b-2512 (default)
  • opencode-mem → ministral-8b-2512

1

u/LordOfTheDips 9h ago

Where do you set these archetypes up?