Model comparison
NVIDIA Nemotron 3 Ultra vs Upstage Solar Pro 4
NVIDIA against Upstage, compared on context, price, and verified benchmark results.
Catalog record checked September 2, 2026Individual provider fields may changeEvidence confidence: High — see receipts below
NVIDIA
NVIDIA Nemotron 3 Ultra
Frontier · Open weights
Upstage
Upstage Solar Pro 4
Frontier
| Specification | NVIDIA Nemotron 3 Ultra | Upstage Solar Pro 4 |
|---|---|---|
| Provider | NVIDIA | Upstage |
| Tier | Frontier | Frontier |
| Context window | Winner: 1M | 524K |
| Max output | Not verifiedUnverified | Not verifiedUnverified |
| Input / 1M tokens | $0.50 | Winner: $0.30 |
| Output / 1M tokens | $2.20 | Winner: $1.20 |
| Weights | Open | Closed |
| Parameters | 550B total / 55B active (MoE) | Not disclosedUnverified |
| Reasoning levels | low, high, max | low, medium, high |
| Modalities | text | text |
| API model id | nemotron-3-ultra-550b-a55b | solar-pro-4 |
| Released | June 4, 2026 | August 10, 2026 |
| Artificial Analysis Intelligence Index (2026-08-14) | Winner: 54 | 50 |
Prices are USD per million tokens at standard rates, excluding batch and caching discounts. Bold indicates the better figure where one is objectively better. Values we could not confirm from the provider are shown as “Not verified” rather than estimated.
Benchmark receipts
- 2026-08-14: Artificial AnalysisComposite index blending reasoning, knowledge, and coding evals into one 0–100 score. Comparability: directly comparable — AA occasionally rebaselines the index scale between snapshots — a score captured on one date is only comparable to same-snapshot scores (check measuredAt).
Pricing tiers: NVIDIA Nemotron 3 Ultra: Open weights (weights + data + recipes); $0.50/$2.20 per MTok is the third-party hosted rate (OpenRouter). 550B/55B MoE. · Upstage Solar Pro 4: List $0.30/$1.20 per MTok; live promo rate is $0.03/$0.12 (90% off through 2026-09-10). Closed API. 524K context.
NVIDIA Nemotron 3 Ultra
Nemotron 3 Ultra is NVIDIA's open-weight (550B/55B) frontier MoE with a 1M-token context.
Best for
- Open-weight frontier
- Self-hosting on NVIDIA GPUs
- Reasoning
Watch out
Top US open-weight until Thinking Machines Inkling; verify hosted pricing.
Upstage Solar Pro 4
Solar Pro 4 is Upstage's closed flagship with a 524K context at a low launch price.
Best for
- Long-context
- Cost-sensitive API
- Korean + English
Watch out
Closed API; promo pricing may end.
When the cheaper one wins
Upstage Solar Pro 4 is cheaper on output at $1.20 per million tokens against $2.20 for NVIDIA Nemotron 3 Ultra — about 1.8×. Use the cheaper tier for classification, extraction, summarisation, and any task where the expensive model’s extra score does not change the accepted output. The expensive one only pays if your hardest task actually fails on the cheap tier. These are standard-tier API rates, excluding batch and cache discounts.
Run the model pickerEvidence confidence: High
How strong and complete the evidence behind this comparison is — not a prediction of which model is better.
- Pricing verified on both sides — Input and output rates are verified for both models.
- 3/5 core specs verified on both sides — Not published for at least one side: max output, parameter count.
- 1 shared named benchmark with differing scores — Measured on: Artificial Analysis Intelligence Index.
- Verified within the last 90 days — Newest catalog check was 9 days ago.
- Both models carry source citations — Each side has at least two catalog sources on record.
Source receipts
Each catalog figure was checked against the provider or an independent second source on the date shown.
- NVIDIA Nemotron 3 Ultra: NVIDIA — Nemotron (accessed 2026-08-29)
- NVIDIA Nemotron 3 Ultra: NVIDIA Nemotron 3 Ultra (accessed 2026-08-29)
- Upstage Solar Pro 4: Upstage — Solar Pro 4 (accessed 2026-08-29)
- Upstage Solar Pro 4: Upstage (accessed 2026-08-29)
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- Claude Mythos 5.1 vs NVIDIA Nemotron 3 Ultra
- Claude Mythos 5.1 vs Upstage Solar Pro 4
Diving deeper on one model? NVIDIA Nemotron 3 Ultra · Upstage Solar Pro 4
Common questions
NVIDIA Nemotron 3 Ultra vs Upstage Solar Pro 4
Answered from the verified figures on this page rather than general guidance.
Is NVIDIA Nemotron 3 Ultra or Upstage Solar Pro 4 cheaper for input?
Upstage Solar Pro 4 is cheaper at $0.30 per million input tokens, against $0.50 for NVIDIA Nemotron 3 Ultra — roughly 1.7× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; NVIDIA Nemotron 3 Ultra has tiered pricing: Open weights (weights + data + recipes); $0.50/$2.20 per MTok is the third-party hosted rate (OpenRouter). 550B/55B MoE. Upstage Solar Pro 4 has tiered pricing: List $0.30/$1.20 per MTok; live promo rate is $0.03/$0.12 (90% off through 2026-09-10). Closed API. 524K context.
Is NVIDIA Nemotron 3 Ultra or Upstage Solar Pro 4 cheaper for output?
Upstage Solar Pro 4 is cheaper at $1.20 per million output tokens, against $2.20 for NVIDIA Nemotron 3 Ultra — roughly 1.8× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; NVIDIA Nemotron 3 Ultra has tiered pricing: Open weights (weights + data + recipes); $0.50/$2.20 per MTok is the third-party hosted rate (OpenRouter). 550B/55B MoE. Upstage Solar Pro 4 has tiered pricing: List $0.30/$1.20 per MTok; live promo rate is $0.03/$0.12 (90% off through 2026-09-10). Closed API. 524K context.
Which has the larger context window, NVIDIA Nemotron 3 Ultra or Upstage Solar Pro 4?
NVIDIA Nemotron 3 Ultra accepts 1M tokens against 524K for Upstage Solar Pro 4. This only matters if you routinely send very long documents or large codebases.
Do NVIDIA Nemotron 3 Ultra and Upstage Solar Pro 4 support the same reasoning levels?
NVIDIA Nemotron 3 Ultra exposes low, high, max, while Upstage Solar Pro 4 exposes low, medium, high.
Should I use NVIDIA Nemotron 3 Ultra or Upstage Solar Pro 4?
Both sit in the frontier tier, so the choice usually comes down to price and context rather than capability. NVIDIA Nemotron 3 Ultra suits open-weight frontier; Upstage Solar Pro 4 suits long-context.
Can I self-host NVIDIA Nemotron 3 Ultra or Upstage Solar Pro 4?
NVIDIA Nemotron 3 Ultra publishes open weights, but self-hosting and third-party provider access depend on the licence, hardware, serving support, and availability. Upstage Solar Pro 4 is a closed model whose supported access paths are controlled by its provider.
Next step
Choosing between them
The verified figures that separate this pair, computed from the catalog rather than restated boilerplate.
- Input price: Upstage Solar Pro 4 costs $0.30 per 1M tokens versus $0.50 for NVIDIA Nemotron 3 Ultra — a 1.7x difference at the headline tier.
- Context: NVIDIA Nemotron 3 Ultra takes 1M against 524K for Upstage Solar Pro 4 — only decisive if your prompts approach the smaller window.
- Measured capability: NVIDIA Nemotron 3 Ultra leads Artificial Analysis Intelligence Index 54 to 50 (measured 2026-08-14).
- Deployment: NVIDIA Nemotron 3 Ultra publishes weights you can self-host; the other is API-only.
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