Xiaomi: MiMo-V2.6-Pro-UltraSpeed vs SpaceXAI: Grok 4.6
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| Xiaomi: MiMo-V2.6-Pro-UltraSpeed | SpaceXAI: Grok 4.6 | |
|---|---|---|
| Vendor | xiaomi | x-ai |
| Quality Score | 100 | 100 |
| Input Price | $4.35/M | $2.00/M |
| Output Price | $8.70/M | $6.00/M |
| Context Window | 1,048,576 | 500,000 |
| Max Output | 131,072 | 450,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | ✓ | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Grok 4.6 costs $3.50 and MiMo-V2.6-Pro-UltraSpeed costs $6.52, so Grok 4.6 is about 1.9 times cheaper for the same work.
MiMo-V2.6-Pro-UltraSpeed reads up to 1,048,576 tokens at once, roughly 1,573 pages of text, against about 750 pages for Grok 4.6.
Only MiMo-V2.6-Pro-UltraSpeed offers audio input and video input.
Across the 10 tasks where they differ, Grok 4.6 on 10 (SQL Generation, Code Completion, Code Documentation and others).
MiMo-V2.6-Pro-UltraSpeed was released in September 2026 and Grok 4.6 in August 2026.
Pick MiMo-V2.6-Pro-UltraSpeed if you need long documents, audio input or video input; pick Grok 4.6 if you need lower cost or the stronger all-round task scores.
Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.
Who wins by task?
| Task | Xiaomi: MiMo-V2.6-Pro-UltraSpeed | SpaceXAI: Grok 4.6 |
|---|---|---|
| SQL Generation | 132 | 133 |
| Code Completion | 117 | 118 |
| Code Documentation | 129 | 130 |
| Regex Writing | 117 | 118 |
| CSV / Spreadsheet Cleanup | 132 | 133 |
| JSON Extraction | 121 | 122 |
| Bulk Data Labeling | 118 | 119 |
| Long-Document Summarization | 136 | 137 |
| Short-Form Summarization | 113 | 114 |
| Blog Post Writing | 120 | 121 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →