@thsottiaux Bro, putting all the nonsense aside once again, after DevDay, will it be able to surpass Opus 5.5 overall? If so, then I can go Pro.
But, but... I’m really afraid I haven’t woken up yet.
When I applied for the MiMo Desktop beta, I got approved within just a few hours. Since then, I’ve been spending about an hour and a half testing it every night.
During testing, I ran into a few pretty obvious issues:
1.Long-running tasks often get stuck, time out, or get interrupted. After I reported this, the team reset usage quota.
2.The same tools sometimes get called repeatedly. For the same task, it takes noticeably longer than clients like Codex, A, and DS.
3. It also seems like the context doesn’t automatically get compressed after usage reaches a certain threshold. So when a single task or conversation runs for too long, it tends to become laggy or get stuck.
🛠️ MiMo-V2.6 update: tool-call repetition, diagnosed & fixed.
After the MiMo-V2.6 series models launched, we noticed them sometimes repeating identical or highly similar tool calls — burning context and stalling tasks, especially in MiMo Desktop, MiMo Code and OpenCode.
Root cause
A "reward blind spot" in scaling RL: when rewards only track final-answer correctness, inefficient behaviors along the way go unnoticed — and get amplified as training scales. Concretely, our flooding penalty only kicked in at >32 tool calls per turn, so anything below that threshold went completely unpunished.
The fix
We trained a light-weight repetition-specialized RL teacher — just 12 steps, ~7k examples — and merged it into the main model via MOPD, at roughly 4% of the cost of a full mixRL retrain. Repetition dropped sharply across harnesses and context lengths, while benchmarks held steady.
📦 Updated models, open-sourced (MOPD suffix): https://t.co/u81xJigdkn
📝 Full postmortem: https://t.co/SfFokWC0iD
Huge thanks to our community for the patience and feedback 🙏 Updated models go live on our API platform Sep 25, 06:00 (UTC+8), names unchanged. And for MiMo Desktop users: everyone's remaining quota in the current window will be reset.