MiMo-V2.5-Pro vs Nemotron 3 Ultra 550B A55B
MiMo-V2.5-Pro comes out ahead, 54 to 50 on our weighted score, and it is the cheaper option too.
- Our pick
XiaomiMiMo-V2.5-Pro
54/100- ECI—
- Price$0.435 / $0.87
- Context1.05M
NVIDIANemotron 3 Ultra 550B A55B
50/100- ECI146.2
- Price$0.50 / $2.50
- Context1M
Add a model
Make it a three-way comparison.
MiMo-V2.5-Pro is our pick
MiMo-V2.5-Pro is the better all-round choice, scoring 54/100 against Nemotron 3 Ultra 550B A55B (50). It leads on price. Nemotron 3 Ultra 550B A55B wins on inputs & features. 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 priceMiMo-V2.5-ProMiMo-V2.5-Pro $0.544 · Nemotron 3 Ultra 550B A55B $1.00 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2.5-ProMiMo-V2.5-Pro 1,048,576 · Nemotron 3 Ultra 550B A55B 1,000,000 tokens
- Widest inputsSame inputsMiMo-V2.5-Pro: Text · Nemotron 3 Ultra 550B A55B: Text
- Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
| Measure | Weight | MiMo-V2.5-Pro | Nemotron 3 Ultra 550B A55B |
|---|---|---|---|
| Price | 50% | 62 | 50 |
| Inputs & features | 30% | 35 | 45 |
| Context window | 20% | 61 | 60 |
| Overall | 100% | 54/100 | 50/100 |
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-ProXiaomi | Nemotron 3 Ultra 550B A55BNVIDIA |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | 146.2 |
| ECI rank | — | #70 of 148 |
| GPQA DiamondGraduate-level science questions | — | 85.4% |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 86.7% |
| Price per million tokens | ||
| Input | $0.435 (best) | $0.50 |
| Output | $0.87 (best) | $2.50 |
| Cached input | $0.0036 (best) | $0.15 |
| Blended (3:1) | $0.544 (best) | $1.00 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Xiaomi API | Official Nvidia API |
| Limits | ||
| Context window | 1,048,576 tokens (best) | 1,000,000 tokens |
| Max output | 131,072 tokens (best) | 128,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Structured output | No | Yes |
| Availability | ||
| Weights | Open | Open |
| API model ID | mimo-v2.5-pro | nvidia/nemotron-3-ultra-550b-a55b |
| API providers | 20 | 21 (best) |
| Released | Apr 22, 2026 | Jun 4, 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$6.09
- Nemotron 3 Ultra 550B A55B$10.00
Which should you choose?
Which is better: MiMo-V2.5-Pro or Nemotron 3 Ultra 550B A55B?
MiMo-V2.5-Pro is the better all-round choice, scoring 54/100 against Nemotron 3 Ultra 550B A55B (50). It leads on price. Nemotron 3 Ultra 550B A55B wins on inputs & features. 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 or Nemotron 3 Ultra 550B A55B?
MiMo-V2.5-Pro is cheaper at $0.435 input / $0.87 output per million tokens (official Xiaomi API price). Nemotron 3 Ultra 550B A55B costs $0.50 input / $2.50 output per million tokens (official Nvidia API price). At a typical mix of three input tokens to one output token, that is $0.544 per million tokens for MiMo-V2.5-Pro versus $1.00 for Nemotron 3 Ultra 550B A55B (1.8× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. MiMo-V2.5-Pro has not been scored yet and Nemotron 3 Ultra 550B A55B has an ECI of 146.2.
Which is better for coding?
There are no published SWE-bench Verified results for MiMo-V2.5-Pro and Nemotron 3 Ultra 550B A55B 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 has the largest context window at 1,048,576 tokens, against 1,000,000 for Nemotron 3 Ultra 550B A55B. Maximum output per response: MiMo-V2.5-Pro up to 131,072, Nemotron 3 Ultra 550B A55B up to 128,000 tokens.
Which can read images, PDFs, audio or video?
MiMo-V2.5-Pro accepts text; Nemotron 3 Ultra 550B A55B 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?
Nemotron 3 Ultra 550B A55B is the newest, released Jun 4, 2026. MiMo-V2.5-Pro came out Apr 22, 2026. Knowledge cutoff: MiMo-V2.5-Pro 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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