MiMo-V2.6-Pro-UltraSpeed vs Viv Fast vs Qwen 3.8 Max Prime
Viv Fast comes out ahead, 75 to 44 and 42 on our weighted score, and it is the cheaper option too.
XiaomiMiMo-V2.6-Pro-UltraSpeed
44/100- ECI—
- Price$4.35 / $8.70
- Context1.05M
- Our pick
VivgridViv Fast
75/100- ECI—
- Price$0.13 / $0.40
- Context1M
Alibaba (Qwen)Qwen 3.8 Max Prime
42/100- ECI—
- Price$4.00 / $12.00
- Context1M
Viv Fast is our pick
Viv Fast is the better all-round choice, scoring 75/100 against MiMo-V2.6-Pro-UltraSpeed (44) and Qwen 3.8 Max Prime (42). It leads on price. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceViv FastViv Fast $0.198 · MiMo-V2.6-Pro-UltraSpeed $5.44 · Qwen 3.8 Max Prime $6.00 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2.6-Pro-UltraSpeedMiMo-V2.6-Pro-UltraSpeed 1,048,576 · Viv Fast 1,000,000 · Qwen 3.8 Max Prime 1,000,000 tokens
- Widest inputsMiMo-V2.6-Pro-UltraSpeedMiMo-V2.6-Pro-UltraSpeed: Text, Images, Audio, Video · Viv Fast: Text, Images · Qwen 3.8 Max Prime: Text, Images, Video
- Self-hostingMiMo-V2.6-Pro-UltraSpeedPublishes downloadable weights
| Measure | Weight | MiMo-V2.6-Pro-UltraSpeed | Viv Fast | Qwen 3.8 Max Prime |
|---|---|---|---|---|
| Price | 50% | 15 | 83 | 13 |
| Inputs & features | 30% | 80 | 70 | 80 |
| Context window | 20% | 61 | 60 | 60 |
| Overall | 100% | 44/100 | 75/100 | 42/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | MiMo-V2.6-Pro-UltraSpeedXiaomi | Viv FastVivgrid | Qwen 3.8 Max PrimeAlibaba (Qwen) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $4.35 | $0.13 (best) | $4.00 |
| Output | $8.70 | $0.40 (best) | $12.00 |
| Cached input | $0.036 (best) | $0.05 | — |
| Blended (3:1) | $5.44 | $0.198 (best) | $6.00 |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Xiaomi API | Official Vivgrid API | Median of 4 providers |
| Limits | |||
| Context window | 1,048,576 tokens (best) | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 131,072 tokens | 256,000 tokens (best) | 131,072 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | No | No | No |
| Audio | Yes | No | No |
| Video | Yes | No | Yes |
| Reasoning | Yes | Yeslow · high · max | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | Yes | Yes |
| Availability | |||
| Weights | Open | Proprietary | Proprietary |
| API model ID | mimo-v2.6-pro-ultraspeed | viv-fast | — |
| API providers | 9 (best) | 1 | 4 |
| Released | Sep 21, 2026 | Sep 21, 2026 | Sep 23, 2026 |
| Knowledge cutoff | — | Sep 2026 | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- MiMo-V2.6-Pro-UltraSpeed$60.90
- Viv Fast$2.10
- Qwen 3.8 Max Prime$64.00
Which should you choose?
Which is better: MiMo-V2.6-Pro-UltraSpeed, Viv Fast or Qwen 3.8 Max Prime?
Viv Fast is the better all-round choice, scoring 75/100 against MiMo-V2.6-Pro-UltraSpeed (44) and Qwen 3.8 Max Prime (42). It leads on price. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, MiMo-V2.6-Pro-UltraSpeed, Viv Fast or Qwen 3.8 Max Prime?
Viv Fast is cheaper at $0.13 input / $0.40 output per million tokens (official Vivgrid API price). MiMo-V2.6-Pro-UltraSpeed costs $4.35 input / $8.70 output per million tokens (official Xiaomi API price); Qwen 3.8 Max Prime costs $4.00 input / $12.00 output per million tokens (median across 4 API providers). At a typical mix of three input tokens to one output token, that is $0.198 per million tokens for Viv Fast versus $5.44 for MiMo-V2.6-Pro-UltraSpeed (28× as much) and $6.00 for Qwen 3.8 Max Prime (30× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. MiMo-V2.6-Pro-UltraSpeed has not been scored yet, Viv Fast has not been scored yet and Qwen 3.8 Max Prime has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for MiMo-V2.6-Pro-UltraSpeed, Viv Fast and Qwen 3.8 Max Prime yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
MiMo-V2.6-Pro-UltraSpeed has the largest context window at 1,048,576 tokens, against 1,000,000 for Viv Fast and 1,000,000 for Qwen 3.8 Max Prime. Maximum output per response: MiMo-V2.6-Pro-UltraSpeed up to 131,072, Viv Fast up to 256,000, Qwen 3.8 Max Prime up to 131,072 tokens.
Which can read images, PDFs, audio or video?
MiMo-V2.6-Pro-UltraSpeed accepts text, images, audio and video; Viv Fast accepts text and images; Qwen 3.8 Max Prime accepts text, images and video. MiMo-V2.6-Pro-UltraSpeed handles the widest range of inputs.
Are any of these open source?
MiMo-V2.6-Pro-UltraSpeed publishes its weights and can be self-hosted; Viv Fast and Qwen 3.8 Max Prime is proprietary.
Which is newer?
Qwen 3.8 Max Prime is the newest, released Sep 23, 2026. MiMo-V2.6-Pro-UltraSpeed came out Sep 21, 2026; Viv Fast came out Sep 21, 2026. Knowledge cutoff: Viv Fast Sep 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
