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Model comparison

Nemotron 3.5 Lightning vs Solar Pro 4

NVIDIANemotron 3.5 Lightning
Input
$0.08
Output
$0.20
Context
1M (256K on a single H100)
Released
2026-08-11
Full model page →UpstageSolar Pro 4
Input
$0.30
Output
$1.20
Context
512K tokens
Released
2026-08-06
Full model page →
Short answer

Solar Pro 4 scores higher on 3 of the 3 benchmarks both models report; Nemotron 3.5 Lightning is cheaper on input tokens ($0.1 vs $0.3 per 1M, 3.8×); Nemotron 3.5 Lightning has the larger context window (1M vs 512K); Nemotron 3.5 Lightning ships open weights while Solar Pro 4 is API-only.

Specs and pricing side by side

SpecNemotron 3.5 LightningSolar Pro 4
MakerNVIDIAUpstage
Released2026-08-112026-08-06
Context window1M (256K on a single H100)512K tokens
Max outputnot published128K tokens
Input price$0.08$0.30
Output price$0.20$1.20
Parameters30B total · 3B active (Mixture-of-Experts)Undisclosed
LicenseOpenMDW-1.1Proprietary (Upstage API and on-premises)
WeightsOpen weightsAPI only
ModalitiesTextTextsame
Knowledge cutoffSeptember 2025 (pre-training); May 2026…February 2026

Benchmarks both models report

BenchmarkNemotron 3.5 LightningSolar Pro 4
GPQA Diamond75.44%89%
SWE-bench Verified51.56%70.6%
BrowseComp36.97%49.2%

Scores are as published by each maker or its cited source; harness, reasoning effort and date can differ between rows, so treat small gaps as ties. Sources are listed on each model page.

Which one should you pick?

Pick Nemotron 3.5 Lightning if…

  • Cost matters: input tokens cost 3.8× less ($0.1 vs $0.3 per 1M).
  • You need the longer context (1M vs 512K).
  • You want to self-host or fine-tune (open weights, OpenMDW-1.1).
  • Your use case is: the execution tier of an agent stack, handling routine tool calls and sub-steps while a larger model makes the hard decisions.

Pick Solar Pro 4 if…

  • You care about GPQA Diamond, SWE-bench Verified, BrowseComp (it scores higher on 3 shared benchmarks).
  • Your use case is: reach for it when an agent has to work across several long documents, contracts or data files in one session.

FAQ

Which is better, Nemotron 3.5 Lightning or Solar Pro 4?

Solar Pro 4 scores higher on 3 of the 3 benchmarks both models report; Nemotron 3.5 Lightning is cheaper on input tokens ($0.1 vs $0.3 per 1M, 3.8×); Nemotron 3.5 Lightning has the larger context window (1M vs 512K); Nemotron 3.5 Lightning ships open weights while Solar Pro 4 is API-only. The better pick depends on whether you value benchmark scores, price per token, context length or openness for your workload.

How much cheaper is Nemotron 3.5 Lightning?

Nemotron 3.5 Lightning: $0.08 input, $0.20 output. Solar Pro 4: $0.30 input, $1.20 output (list API prices as published by each maker).

What are the context windows of Nemotron 3.5 Lightning and Solar Pro 4?

Nemotron 3.5 Lightning offers 1M (256K on a single H100); Solar Pro 4 offers 512K tokens with up to 128K tokens output.

Is Nemotron 3.5 Lightning newer than Solar Pro 4?

Nemotron 3.5 Lightning was released 2026-08-11; Solar Pro 4 was released 2026-08-06.

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