MiMo-V2.5 vs MiMo-V2.6-Pro-UltraSpeed
MiMo-V2.5 costs 7.8x less per output token than MiMo-V2.6-Pro-UltraSpeed ($1.119 vs $8.70 per million). Updated October 23, 2026; no benchmark has tested both models yet.
- Coding
- 50.0
- Overall
- 50.7
- Output $/M
- $1.119
- Coding
- No data
- Overall
- No data
- Output $/M
- $8.70
MiMo-V2.5 or MiMo-V2.6-Pro-UltraSpeed: which to pick
Only MiMo-V2.5 has a coding score, 50.0 on the Vibe Coding Index; MiMo-V2.6-Pro-UltraSpeed has none, so the two cannot be ranked on coding.
Compare them on price, context and the boards below.
No benchmark has tested both yet. MiMo-V2.5 has results on LMArena WebDev, AA Coding Index and LiveCodeBench (Vals AI); MiMo-V2.6-Pro-UltraSpeed has none yet. Compare them on price and context instead.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Only MiMo-V2.5 has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
No call
Only MiMo-V2.5 has a AA Intelligence Index result, 21.8.
Directional only
Agentic work
AA Agentic Index
No call
Only MiMo-V2.5 has a AA Agentic Index result, 15.8.
Directional only
Reasoning
GPQA Diamond
No call
Only MiMo-V2.5 has a GPQA Diamond result, 81.6%.
Directional only
Knowledge
MMLU Pro
No call
Only MiMo-V2.5 has a MMLU Pro result, 82.9%.
Directional only
Web design
Design Arena: websites
No call
Only MiMo-V2.5 has a Design Arena: websites result, 1266.
Directional only
Long documents
Listed context window
MiMo-V2.5
MiMo-V2.5 takes 1.05M tokens against 1.05M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
MiMo-V2.5
MiMo-V2.5 $0.0008, MiMo-V2.6-Pro-UltraSpeed $0.0087 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only MiMo-V2.5 has the number, $0.01.
Directional only
At a glance
- Coding index
- MiMo-V2.5 50.0 from 3 benchmarks, MiMo-V2.6-Pro-UltraSpeed not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- MiMo-V2.5 $1.119 against MiMo-V2.6-Pro-UltraSpeed $8.70 per million output tokens, 7.8x apart.
- Context window
- MiMo-V2.5 takes 1.05M tokens, MiMo-V2.6-Pro-UltraSpeed 1.05M.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index14 boards measured
| Benchmark | MiMo-V2.5 | MiMo-V2.6-Pro-UltraSpeed | Leader |
|---|---|---|---|
| LMArena WebDev | 1438 | Not measured | Only MiMo-V2.5 measured |
| AA Coding Index | 56.8 | Not measured | Only MiMo-V2.5 measured |
| LiveCodeBench (Vals AI) | 81.5% | Not measured | Only MiMo-V2.5 measured |
| SWE-bench Verified (Vals AI) | 71.0% | Not measured | Only MiMo-V2.5 measured |
| Vibe Code Bench (Vals AI) | 42.2% | Not measured | Only MiMo-V2.5 measured |
| Code migration (Vals AI) | 14.2% | Not measured | Only MiMo-V2.5 measured |
| Terminal-Bench 2.1 (Vals AI) | 60.7% | Not measured | Only MiMo-V2.5 measured |
| SciCode | 43.9% | Not measured | Only MiMo-V2.5 measured |
| Terminal-Bench Hard (Artificial Analysis run) | 41.7% | Not measured | Only MiMo-V2.5 measured |
| ALE-Bench | 514.0 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: coding | 1469 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: software and IT | 1463 | Not measured | Only MiMo-V2.5 measured |
| LMArena WebDev: React | 1425 | Not measured | Only MiMo-V2.5 measured |
| LMArena WebDev: HTML | 1430 | Not measured | Only MiMo-V2.5 measured |
| Neither model has a result on the other 29 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | MiMo-V2.5 | MiMo-V2.6-Pro-UltraSpeed | Leader |
|---|---|---|---|
| AA Intelligence Index | 21.8 | Not measured | Only MiMo-V2.5 measured |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index6 boards measured
| Benchmark | MiMo-V2.5 | MiMo-V2.6-Pro-UltraSpeed | Leader |
|---|---|---|---|
| AA Agentic Index | 15.8 | Not measured | Only MiMo-V2.5 measured |
| Finance Agent (Vals AI) | 36.7% | Not measured | Only MiMo-V2.5 measured |
| Tax Agent Bench (Vals AI) | 7.8% | Not measured | Only MiMo-V2.5 measured |
| Legal Research Bench (Vals AI) | 9.1% | Not measured | Only MiMo-V2.5 measured |
| Excel Modeling Benchmark (Vals AI) | 55.1% | Not measured | Only MiMo-V2.5 measured |
| τ²-Bench Telecom | 90.6% | Not measured | Only MiMo-V2.5 measured |
| Neither model has a result on the other 36 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index9 boards measured
| Benchmark | MiMo-V2.5 | MiMo-V2.6-Pro-UltraSpeed | Leader |
|---|---|---|---|
| GPQA Diamond | 81.6% | Not measured | Only MiMo-V2.5 measured |
| MMMU Pro (Vals AI) | 80.0% | Not measured | Only MiMo-V2.5 measured |
| GPQA Diamond (Artificial Analysis run) | 84.9% | Not measured | Only MiMo-V2.5 measured |
| Humanity's Last Exam (Artificial Analysis run) | 27.2% | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: hard prompts | 1450 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: expert | 1459 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: hard prompts in English | 1461 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision: diagrams | 1269 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision: homework | 1262 | Not measured | Only MiMo-V2.5 measured |
| Neither model has a result on the other 14 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index3 boards measured
| Benchmark | MiMo-V2.5 | MiMo-V2.6-Pro-UltraSpeed | Leader |
|---|---|---|---|
| ProofBench | 16.0% | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: math | 1437 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: mathematical work | 1451 | Not measured | Only MiMo-V2.5 measured |
| Neither model has a result on the other 11 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index10 boards measured
| Benchmark | MiMo-V2.5 | MiMo-V2.6-Pro-UltraSpeed | Leader |
|---|---|---|---|
| MMLU Pro | 82.9% | Not measured | Only MiMo-V2.5 measured |
| LegalBench (Vals AI) | 78.9% | Not measured | Only MiMo-V2.5 measured |
| CorpFin (Vals AI) | 59.9% | Not measured | Only MiMo-V2.5 measured |
| TaxEval (Vals AI) | 71.8% | Not measured | Only MiMo-V2.5 measured |
| MortgageTax (Vals AI) | 59.3% | Not measured | Only MiMo-V2.5 measured |
| MedCode (Vals AI) | 31.9% | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: science | 1440 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: medicine and healthcare | 1432 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: legal and government | 1425 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: business and finance | 1432 | Not measured | Only MiMo-V2.5 measured |
| Neither model has a result on the other 10 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards measured
| Benchmark | MiMo-V2.5 | MiMo-V2.6-Pro-UltraSpeed | Leader |
|---|---|---|---|
| Design Arena: websites | 1266 | Not measured | Only MiMo-V2.5 measured |
| Design Arena: UI components | 1255 | Not measured | Only MiMo-V2.5 measured |
| Design Arena: game dev | 1249 | Not measured | Only MiMo-V2.5 measured |
| Design Arena: data viz | 1250 | Not measured | Only MiMo-V2.5 measured |
| Design Arena: 3D | 1217 | Not measured | Only MiMo-V2.5 measured |
| Design Arena: all code categories | 1260 | Not measured | Only MiMo-V2.5 measured |
| Design Arena: SVG | 1180 | Not measured | Only MiMo-V2.5 measured |
| Design Arena: ASCII art | 1140 | Not measured | Only MiMo-V2.5 measured |
| Neither model has a result on the other 1 board here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index29 boards measured
| Benchmark | MiMo-V2.5 | MiMo-V2.6-Pro-UltraSpeed | Leader |
|---|---|---|---|
| SAGE (Vals AI) | 43.3% | Not measured | Only MiMo-V2.5 measured |
| MedScribe (Vals AI) | 72.2% | Not measured | Only MiMo-V2.5 measured |
| Vals Multimodal Index | 52.8% | Not measured | Only MiMo-V2.5 measured |
| IFBench | 67.1% | Not measured | Only MiMo-V2.5 measured |
| Long context reasoning (AA-LCR) | 73.0% | Not measured | Only MiMo-V2.5 measured |
| LMArena Text | 1428 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: instruction following | 1435 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: creative writing | 1393 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision | 1247 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: English | 1447 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: non-English | 1405 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: Chinese | 1469 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: German | 1422 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: Japanese | 1306 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: Korean | 1361 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: French | 1448 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: Spanish | 1414 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: Russian | 1396 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: Polish | 1412 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: multi-turn | 1445 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: longer queries | 1445 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: writing and language | 1409 | Not measured | Only MiMo-V2.5 measured |
| LMArena Text: entertainment and media | 1399 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision: English | 1259 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision: Chinese | 1326 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision: reading text | 1256 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision: humor | 1226 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision: recognizing things | 1189 | Not measured | Only MiMo-V2.5 measured |
| LMArena Vision: creative writing | 1230 | Not measured | Only MiMo-V2.5 measured |
| Neither model has a result on the other 19 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
MiMo-V2.5 costs less
Repository review
50K input + 3K output tokens
MiMo-V2.5 costs less
Agent loop
200K input + 10K output tokens
MiMo-V2.5 costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Xiaomi MiMo-V2.5 | Xiaomi MiMo-V2.6-Pro-UltraSpeed |
|---|---|---|
| Maker | Xiaomi | Xiaomi |
| Weights | Open weights | No public weights listed |
| Released | April 22, 2026 | September 21, 2026 |
| Context window | 1.05M | 1.05M |
| Input $/Mtok | $0.2595 | $4.35 |
| Output $/Mtok | $1.119 | $8.70 |
| Coding index | 50.0 | Not benchmarked |
| Independent measurements behind it | 3 | 0 |
| Cost per solved task | $0.01 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is MiMo-V2.5 better than MiMo-V2.6-Pro-UltraSpeed for coding?
Only MiMo-V2.5 has a coding score, 50.0 on the Vibe Coding Index; MiMo-V2.6-Pro-UltraSpeed has none, so the two cannot be ranked on coding. Compare them on price, context and the boards below.
Which is cheaper, MiMo-V2.5 or MiMo-V2.6-Pro-UltraSpeed?
MiMo-V2.5 costs $0.2595 per million input tokens and $1.119 per million output tokens; MiMo-V2.6-Pro-UltraSpeed costs $4.35 and $8.70. Cost per solved task is known for MiMo-V2.5 only.
Which has the bigger context window, MiMo-V2.5 or MiMo-V2.6-Pro-UltraSpeed?
MiMo-V2.5, with 1.05M tokens against 1.05M.
Has any benchmark tested both MiMo-V2.5 and MiMo-V2.6-Pro-UltraSpeed?
No benchmark has tested both yet. MiMo-V2.5 has results on LMArena WebDev, AA Coding Index and LiveCodeBench (Vals AI); MiMo-V2.6-Pro-UltraSpeed has none yet. Compare them on price and context instead. Data as of October 23, 2026.