Xiaomi's MiMo-V2.6 Pro tops open-source leaderboard at 46 AA, $0.13 per task
SucceededMind · x · 2026-09-24
Xiaomi released and open-sourced the MiMo-V2.6 series (Pro and Flash, both natively fully multimodal). MiMo-V2.6-Pro scored 46 on the Artificial Analysis Intelligence Index, beating Kimi K3 and Qwen3.8 Max to become the strongest open-source model, though still behind closed-source leaders like Claude Fable 5.1 and GPT-6 Astra.
Key points:
- Post-training driven: gains came from a scaled RL self-improvement (RSI) loop — Environment × Task × Grader, 30 RL steps, 750k trajectories, 6 days of live RL training, roughly $2.6M total. Same pretraining foundation, pushed further
- Cost: $0.13 per AA Index task; API pricing unchanged from V2.5, claiming a new cost-performance record among Chinese models
- Packaging: native multimodality plus 1M context
The story: Xiaomi didn't invent new pretraining — it scaled the post-training loop and pushed the intelligence-vs-cost Pareto frontier outward.
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