MiMo-V2.5-Pro-UltraSpeed vs Hy4 preview
Too close to call on our weighted score (Hy4 preview 45, MiMo-V2.5-Pro-UltraSpeed 43). The right pick depends on what you value most.
XiaomiMiMo-V2.5-Pro-UltraSpeed
43/100- ECI—
- Price$1.30 / $2.61
- Context1.05M
TencentHy4 preview
45/100- ECI—
- Price$0.834 / $2.50
- Context1.02M
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Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within 3 points (Hy4 preview 45/100, MiMo-V2.5-Pro-UltraSpeed 43/100), so choose by what matters most for your work: Hy4 preview on price and MiMo-V2.5-Pro-UltraSpeed for long inputs. 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 priceHy4 previewHy4 preview $1.25 · MiMo-V2.5-Pro-UltraSpeed $1.63 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2.5-Pro-UltraSpeedMiMo-V2.5-Pro-UltraSpeed 1,048,576 · Hy4 preview 1,024,000 tokens
- Widest inputsSame inputsMiMo-V2.5-Pro-UltraSpeed: Text · Hy4 preview: Text
- Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
| Measure | Weight | MiMo-V2.5-Pro-UltraSpeed | Hy4 preview |
|---|---|---|---|
| Price | 50% | 40 | 45 |
| Inputs & features | 30% | 35 | 35 |
| Context window | 20% | 61 | 60 |
| Overall | 100% | 43/100 | 45/100 |
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-V2.5-Pro-UltraSpeedXiaomi | Hy4 previewTencent |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $1.30 | $0.834 (best) |
| Output | $2.61 | $2.50 (best) |
| Cached input | $0.011 (best) | $0.042 |
| Blended (3:1) | $1.63 | $1.25 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Official Xiaomi API | Official Tencent TokenHub API |
| Limits | ||
| Context window | 1,048,576 tokens (best) | 1,024,000 tokens |
| Max output | 131,072 tokens (best) | 64,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yes | Yeshigh |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Open | Open |
| API model ID | mimo-v2.5-pro-ultraspeed | hy4-preview |
| API providers | 1 | 13 (best) |
| Released | Jun 8, 2026 | Aug 28, 2026 |
| Knowledge cutoff | Dec 2024 | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- MiMo-V2.5-Pro-UltraSpeed$18.27
- Hy4 preview$13.34
Which should you choose?
Which is better: MiMo-V2.5-Pro-UltraSpeed or Hy4 preview?
It is close. Our weighted score puts them within 3 points (Hy4 preview 45/100, MiMo-V2.5-Pro-UltraSpeed 43/100), so choose by what matters most for your work: Hy4 preview on price and MiMo-V2.5-Pro-UltraSpeed for long inputs. 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-V2.5-Pro-UltraSpeed or Hy4 preview?
Hy4 preview is cheaper at $0.834 input / $2.50 output per million tokens (official Tencent TokenHub API price). MiMo-V2.5-Pro-UltraSpeed costs $1.30 input / $2.61 output per million tokens (official Xiaomi API price). At a typical mix of three input tokens to one output token, that is $1.25 per million tokens for Hy4 preview versus $1.63 for MiMo-V2.5-Pro-UltraSpeed (1.3× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. MiMo-V2.5-Pro-UltraSpeed has not been scored yet and Hy4 preview has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for MiMo-V2.5-Pro-UltraSpeed and Hy4 preview yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
MiMo-V2.5-Pro-UltraSpeed has the largest context window at 1,048,576 tokens, against 1,024,000 for Hy4 preview. Maximum output per response: MiMo-V2.5-Pro-UltraSpeed up to 131,072, Hy4 preview up to 64,000 tokens.
Which can read images, PDFs, audio or video?
MiMo-V2.5-Pro-UltraSpeed accepts text; Hy4 preview accepts text. They handle the same number of input types.
Are any of these open source?
Yes, both publish their weights, so you can self-host them.
Which is newer?
Hy4 preview is the newest, released Aug 28, 2026. MiMo-V2.5-Pro-UltraSpeed came out Jun 8, 2026. Knowledge cutoff: MiMo-V2.5-Pro-UltraSpeed Dec 2024.
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.
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