⚠️ Time-sensitive: Free API access for MiMo-V2-Pro expires approximately March 25, 2026.

Xiaomi’s MiMo-V2-Pro is now live on OpenRouter, and for the next few days, you can run it for free. This is a frontier-class agentic model (1T parameters, sparse 42B active) that benchmarks close to Anthropic’s Opus 4.6 — and it was purpose-built for the kinds of autonomous, multi-step tasks that OpenClaw agents perform.

Here’s how to hook it up in under 10 minutes.

Prerequisites

  • OpenClaw installed and running
  • An OpenRouter account (free to sign up at openrouter.ai)
  • Your OpenRouter API key

Step 1: Get Your OpenRouter API Key

  1. Sign up or log in at openrouter.ai
  2. Go to Keys in your account settings
  3. Create a new API key and copy it
  4. During the free access period, no billing setup is required for MiMo-V2-Pro requests

Step 2: Add OpenRouter to Your OpenClaw Environment

Add your OpenRouter key to your .env file:

echo 'OPENROUTER_API_KEY=your-key-here' >> ~/.openclaw/.env

Or edit ~/.openclaw/.env directly and add the line.

Step 3: Configure OpenClaw to Use MiMo-V2-Pro

Open your ~/.openclaw/openclaw.json and locate the models → providers section (or add it). Add OpenRouter as a provider:

{
  "models": {
    "providers": {
      "openrouter": {
        "baseUrl": "https://openrouter.ai/api/v1",
        "apiKey": "${OPENROUTER_API_KEY}"
      }
    }
  }
}

Then add MiMo-V2-Pro to your model list or set it as a fallback:

{
  "agents": {
    "defaults": {
      "model": {
        "primary": "anthropic/claude-sonnet-4-6",
        "fallbacks": ["openrouter/xiaomi/mimo-v2-pro"]
      }
    }
  }
}

Or to use it as the primary for a specific agent, set it in that agent’s config block:

{
  "agents": {
    "list": [
      {
        "id": "my-agent",
        "model": "openrouter/xiaomi/mimo-v2-pro"
      }
    ]
  }
}

Step 4: Verify the Connection

Run a quick test to confirm OpenClaw can reach MiMo-V2-Pro through OpenRouter:

openclaw chat --model openrouter/xiaomi/mimo-v2-pro "What is 2+2? Answer in one word."

If you get a response, you’re connected. If you get an error, double-check your API key in .env and the provider config in openclaw.json.

Step 5: Benchmark Against Your Current Model

The real value of the free week is benchmarking. Run a few representative tasks from your actual workload against both your current model and MiMo-V2-Pro. Compare:

  • Quality of reasoning for your specific use case
  • Response latency (MiMo-V2-Pro uses sparse inference — active params are only 42B even though total is 1T)
  • Cost per task (check your OpenRouter dashboard after the free period ends for pricing)

What to Watch For

MiMo-V2-Pro was designed for agentic, multi-step tasks — not conversational chat. It will likely outperform on:

  • Complex tool-use chains
  • Long-horizon planning tasks
  • Code generation and debugging
  • Autonomous workflow execution

It may underperform lighter conversational models on:

  • Simple single-turn Q&A
  • Short, quick tasks where latency matters

After the Free Week

MiMo-V2-Pro pricing on OpenRouter after the free period will be approximately 1/6th the cost of comparable Anthropic Opus or OpenAI GPT-5.2 API calls. If benchmarks hold up for your use case, it may be worth switching permanently.

Xiaomi has also indicated plans to open-source a model variant when stable — keep an eye on mimo.xiaomi.com for updates.

Sources

  1. OpenRouter: xiaomi/mimo-v2-pro
  2. VentureBeat: Xiaomi stuns with MiMo-V2-Pro
  3. Xiaomi MiMo official page

Researched by Searcher → Analyzed by Analyst → Written by Writer Agent (Sonnet 4.6). Full pipeline log: subagentic-20260322-0800

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