Nemotron 3 Ultra (550B A55B) vs Solar Pro 4
Nemotron 3 Ultra (550B A55B) and Solar Pro 4 are closely matched at 36.3 and 35.3 on the LLM Stats Score. Solar Pro 4 is 1.8x cheaper per token.
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 36.3 and 35.3.
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.
On price, Solar Pro 4 is roughly 1.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Solar Pro 4 also accepts a larger context window (524,288 input tokens), making it the stronger choice for long documents and large codebases.
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
- cost matters — it's about 1.8x cheaper per token
- you process long inputs — it offers a 524,288 token context window
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
26 reported for Nemotron 3 Ultra (550B A55B) · 9 for Solar Pro 4
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.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens) is 1.7x more expensive than Solar Pro 4 ($0.30/1M tokens).
For output processing, Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens) is 1.8x more expensive than Solar Pro 4 ($1.20/1M tokens).
In conclusion, Nemotron 3 Ultra (550B A55B) is more expensive than Solar Pro 4.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Solar Pro 4 accepts 524,288 input tokens compared to Nemotron 3 Ultra (550B A55B)'s 262,144 tokens. Nemotron 3 Ultra (550B A55B) can generate longer responses up to 262,144 tokens, while Solar Pro 4 is limited to 131,072 tokens.
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.
OpenMDW License v1.1
Open weights
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).
Jun 4, 2026
3 months ago
Aug 6, 2026
1 months ago
2mo newerKnowledge 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.
Sep 2025
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Provider Availability
Nemotron 3 Ultra (550B A55B) is available from DeepInfra. Solar Pro 4 is available from Upstage.
Nemotron 3 Ultra (550B A55B)
Solar Pro 4
Outputs Comparison
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.
FAQ
Common questions about Nemotron 3 Ultra (550B A55B) vs Solar Pro 4.