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Nemotron 3 Ultra (550B A55B) vs Solar Pro 4

Nemotron 3 Ultra (550B A55B) and Solar Pro 4 are closely matched at 37.0 and 36.0 on the LLM Stats Score.

NVIDIA · Upstage · Updated for 2026

Which is better?

Nemotron 3 Ultra (550B A55B) and Solar Pro 4 are closely matched on the overall LLM Stats Score at 37.0 and 36.0.

In the 6 individual benchmarks reported for both models, Solar Pro 4 wins 4; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Nemotron 3 Ultra (550B A55B)

  • you need open weights you can self-host or fine-tune

Choose Solar Pro 4

  • you value its reported benchmark strengths — it wins 4 of 6 exact shared results
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Nemotron 3 Ultra (550B A55B)
NVIDIA
Solar Pro 4
Upstage
Core performance indexes
LLM Stats Score
37.0
#63
36.0
#72
Reasoning
36.3
#67
35.6
#71
Coding
22.1
#72
22.1
#73
Agents
13.4
#86
13.8
#84
Cost, coverage & limits
Benchmark wins
2 of 6
4 of 6
Input price
— / M
$0.30 / M
Output price
— / M
$1.20 / M
Context window
—
524,288

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Nemotron 3 Ultra (550B A55B)
Solar Pro 4
Math
36.4#37
32.0#55
Tool use
7.4#132
15.3#81
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

26 reported for Nemotron 3 Ultra (550B A55B) · 9 for Solar Pro 4

6 shared

Nemotron 3 Ultra (550B A55B) outperforms in 2 benchmarks (MMLU-Pro, SWE-Bench Verified), while Solar Pro 4 is better at 4 benchmarks (AA-LCR, BrowseComp, GPQA, Terminal-Bench 2.1).

Solar Pro 4 shows notably better performance in the majority of benchmarks.

Fri Aug 28 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Solar Pro 4 specifies input context (524,288 tokens). Only Solar Pro 4 specifies output context (131,072 tokens).

NVIDIA
Nemotron 3 Ultra (550B A55B)
Input- tokens
Output- tokens
Upstage
Solar Pro 4
Input524,288 tokens
Output131,072 tokens
Fri Aug 28 2026 • llm-stats.com

License

Usage and distribution terms

Nemotron 3 Ultra (550B A55B) is licensed under OpenMDW License v1.1, while Solar Pro 4 uses a proprietary license.

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

Solar Pro 4

Proprietary

Closed source

Release Timeline

When each model was launched

Nemotron 3 Ultra (550B A55B) was released on 2026-06-04, while Solar Pro 4 was released on 2026-08-06.

Solar Pro 4 is 2 months newer than Nemotron 3 Ultra (550B A55B).

Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

2 months ago

Solar Pro 4

Aug 6, 2026

3 weeks ago

2mo newer

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Solar Pro 4'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 Solar Pro 4's cutoff date.

Nemotron 3 Ultra (550B A55B)

Sep 2025

Solar Pro 4

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Nemotron 3 Ultra (550B A55B) and Solar Pro 4 side-by-side, then vote on the output you prefer.

Nemotron 3 Ultra (550B A55B)
✓ Preferred
Solar Pro 4
Open in Playground

FAQ

Common questions about Nemotron 3 Ultra (550B A55B) vs Solar Pro 4.

Which is better, Nemotron 3 Ultra (550B A55B) or Solar Pro 4?

Nemotron 3 Ultra (550B A55B) and Solar Pro 4 are closely matched on the LLM Stats Score at 37.0 and 36.0. Nemotron 3 Ultra (550B A55B) is made by NVIDIA and Solar Pro 4 is made by Upstage. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Nemotron 3 Ultra (550B A55B) compare to Solar Pro 4 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%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

What are the context window sizes for Nemotron 3 Ultra (550B A55B) and Solar Pro 4?

Nemotron 3 Ultra (550B A55B) supports an unknown number of tokens and Solar Pro 4 supports 524K 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 Solar Pro 4?

Key differences include LLM Stats Score (37.0 vs 36.0), licensing (OpenMDW License v1.1 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Nemotron 3 Ultra (550B A55B) and Solar Pro 4?

Nemotron 3 Ultra (550B A55B) is developed by NVIDIA and Solar Pro 4 is developed by Upstage.

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