Model Comparison

Nemotron 3 Ultra (550B A55B) vs MiMo-V2.5-ProWhich is better in 2026?

Both models are evenly matched across the benchmarks.

Verdict: Nemotron 3 Ultra (550B A55B) vs MiMo-V2.5-Pro — which is better?

Nemotron 3 Ultra (550B A55B) (by NVIDIA) and MiMo-V2.5-Pro (by Xiaomi) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Nemotron 3 Ultra (550B A55B) outperforms in 4 benchmarks (GPQA, Humanity's Last Exam, LiveCodeBench v6, MMLU-Pro), while MiMo-V2.5-Pro is better at 4 benchmarks (Finance Agent v2, GDPval-AA, SWE-Bench Verified, TAU3-Bench). Both models are evenly matched across the benchmarks.

Choose Nemotron 3 Ultra (550B A55B) if…

  • you want the most recent training data — it shipped Jun 2026

Choose MiMo-V2.5-Pro if…

  • you want predictable pricing at $0.43/M input and $0.87/M output

Performance Benchmarks

Comparative analysis across standard metrics

8 benchmarks

Nemotron 3 Ultra (550B A55B) outperforms in 4 benchmarks (GPQA, Humanity's Last Exam, LiveCodeBench v6, MMLU-Pro), while MiMo-V2.5-Pro is better at 4 benchmarks (Finance Agent v2, GDPval-AA, SWE-Bench Verified, TAU3-Bench).

Both models are evenly matched across the benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

473.2B diff

MiMo-V2.5-Pro has 473.2B more parameters than Nemotron 3 Ultra (550B A55B), making it 86.0% larger.

NVIDIA
Nemotron 3 Ultra (550B A55B)
550.0Bparameters
Xiaomi
MiMo-V2.5-Pro
1.0Tparameters
550.0B
Nemotron 3 Ultra (550B A55B)
1023.2B
MiMo-V2.5-Pro

Context Window

Maximum input and output token capacity

Only MiMo-V2.5-Pro specifies input context (1,048,576 tokens). Only MiMo-V2.5-Pro specifies output context (131,072 tokens).

NVIDIA
Nemotron 3 Ultra (550B A55B)
Input- tokens
Output- tokens
Xiaomi
MiMo-V2.5-Pro
Input1,048,576 tokens
Output131,072 tokens
Fri Jul 17 2026 • llm-stats.com

License

Usage and distribution terms

Nemotron 3 Ultra (550B A55B) is licensed under OpenMDW License v1.1, while MiMo-V2.5-Pro uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

MiMo-V2.5-Pro

MIT

Open weights

Release Timeline

When each model was launched

Nemotron 3 Ultra (550B A55B) was released on 2026-06-04, while MiMo-V2.5-Pro was released on 2026-04-27.

Nemotron 3 Ultra (550B A55B) is 1 month newer than MiMo-V2.5-Pro.

Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

1 months ago

1mo newer
MiMo-V2.5-Pro

Apr 27, 2026

2 months ago

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while MiMo-V2.5-Pro's cutoff date is not specified.

We can confirm Nemotron 3 Ultra (550B A55B)'s training data extends to 2025-09-30, but cannot make a direct comparison without MiMo-V2.5-Pro's cutoff date.

Nemotron 3 Ultra (550B A55B)

Sep 2025

MiMo-V2.5-Pro

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

NVIDIA
Higher GPQA score (87.0% vs 66.7%)
Higher Humanity's Last Exam score (37.4% vs 34.0%)
Higher LiveCodeBench v6 score (89.0% vs 39.6%)
Higher MMLU-Pro score (86.8% vs 68.5%)
Xiaomi
Larger context window (1,048,576 tokens)
Higher Finance Agent v2 score (41.5% vs 37.5%)
Higher GDPval-AA score (42.9% vs 39.4%)
Higher SWE-Bench Verified score (78.9% vs 70.7%)
Higher TAU3-Bench score (72.9% vs 22.6%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Nemotron 3 Ultra (550B A55B) and MiMo-V2.5-Pro side-by-side, then vote on the output you prefer.

Nemotron 3 Ultra (550B A55B)
✓ Preferred
MiMo-V2.5-Pro
Open in Playground
AI Model Comparison Table
Feature
NVIDIA
Nemotron 3 Ultra (550B A55B)
Xiaomi
MiMo-V2.5-Pro

FAQ

Common questions about Nemotron 3 Ultra (550B A55B) vs MiMo-V2.5-Pro.

Which is better, Nemotron 3 Ultra (550B A55B) or MiMo-V2.5-Pro?

Both models are evenly matched across the benchmarks. Nemotron 3 Ultra (550B A55B) is made by NVIDIA and MiMo-V2.5-Pro is made by Xiaomi. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Nemotron 3 Ultra (550B A55B) compare to MiMo-V2.5-Pro in benchmarks?

Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%. MiMo-V2.5-Pro scores FrontierSWE (Impl.): 100.0%, GSM8k: 99.6%, ARC-C: 97.2%, MMLU-Redux: 92.8%, C-Eval: 91.5%.

What are the context window sizes for Nemotron 3 Ultra (550B A55B) and MiMo-V2.5-Pro?

Nemotron 3 Ultra (550B A55B) supports an unknown number of tokens and MiMo-V2.5-Pro supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Nemotron 3 Ultra (550B A55B) and MiMo-V2.5-Pro?

Key differences include licensing (OpenMDW License v1.1 vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Nemotron 3 Ultra (550B A55B) and MiMo-V2.5-Pro?

Nemotron 3 Ultra (550B A55B) is developed by NVIDIA and MiMo-V2.5-Pro is developed by Xiaomi.

Related comparisons