Model comparison

Nemotron 3.5 Lightning vs Solar Pro4

Solar Pro4 is the stronger model overall, scoring 41.5 to 39.3 on the Noometry Index. Nemotron 3.5 Lightning costs 6.2× less per token, which makes it the better buy when Solar Pro4's lead doesn't matter for your workload.

Last verified October 10, 2026. 17 shared benchmarks.

Nemotron 3.5 Lightning

NVIDIA

39.3

Rank #156 Confirmed

Solar Pro4

Upstage

41.5

Rank #123 Confirmed

Summary

They share 17 benchmarks with published results for both. Nemotron 3.5 Lightning scores higher in 0 categories and Solar Pro4 in 8 categories; 7 gaps are clear of the uncertainty.
The widest gap is in writing & preference, where Solar Pro4 leads 56.7 to 48.5.
Nemotron 3.5 Lightning is cheaper at $0.06 / $0.16 per million input/output tokens, against $0.30 / $1.20 for Solar Pro4.
Solar Pro4 accepts more context: 524K tokens versus 262K.
Nemotron 3.5 Lightning has downloadable open weights; the other is API-only.

Side by side

Nemotron 3.5 Lightning and Solar Pro4 specifications
	Nemotron 3.5 Lightning	Solar Pro4
Provider	NVIDIA	Upstage
Noometry Index	39.3	41.5
Released	2026-08-11	2026-08-06
Weights	Open	Proprietary
Context window	262K	524K
Max output	262K	131K
Input $ / M tokens	$0.06	$0.30
Output $ / M tokens	$0.16	$1.20
Results tracked	18	18

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Category by category

Coding Too close to call

Nemotron 3.5 Lightning: 39.6 (#143), Solar Pro4: 39.9 (#135)

Coding benchmarks
Benchmark	Nemotron 3.5 Lightning	Solar Pro4
LMArena Coding	1370	1439
LMArena WebDev	—	1371

Reasoning Solar Pro4 leads

Nemotron 3.5 Lightning: 25.7 (#128), Solar Pro4: 27.3 (#107)

Reasoning benchmarks
Benchmark	Nemotron 3.5 Lightning	Solar Pro4
LMArena Hard Prompts	1335	1398

Math Solar Pro4 leads

Nemotron 3.5 Lightning: 34.7 (#156), Solar Pro4: 36.1 (#129)

Math benchmarks
Benchmark	Nemotron 3.5 Lightning	Solar Pro4
LMArena Math	1355	1418

Knowledge Solar Pro4 leads

Nemotron 3.5 Lightning: 36.9 (#154), Solar Pro4: 39.0 (#128)

Knowledge benchmarks
Benchmark	Nemotron 3.5 Lightning	Solar Pro4
LMArena Expert	1354	1421

Multilingual Solar Pro4 leads

Nemotron 3.5 Lightning: 44.0 (#175), Solar Pro4: 49.0 (#134)

Multilingual benchmarks
Benchmark	Nemotron 3.5 Lightning	Solar Pro4
LMArena Non-English	1292	1362
LMArena Chinese	1356	1417
LMArena French	1369	1403
LMArena German	1280	1351
LMArena Japanese	1213	1300
LMArena Korean	1233	1383
LMArena Russian	1257	1360
LMArena Spanish	1321	1408

Instruction Following Solar Pro4 leads

Nemotron 3.5 Lightning: 69.8 (#166), Solar Pro4: 72.8 (#128)

Instruction Following benchmarks
Benchmark	Nemotron 3.5 Lightning	Solar Pro4
LMArena Instruction Following	1317	1376

Long Context Solar Pro4 leads

Nemotron 3.5 Lightning: 39.9 (#160), Solar Pro4: 42.0 (#125)

Long Context benchmarks
Benchmark	Nemotron 3.5 Lightning	Solar Pro4
LMArena Longer Query	1312	1379

Writing & Preference Solar Pro4 leads

Nemotron 3.5 Lightning: 48.5 (#198), Solar Pro4: 56.7 (#133)

Writing & Preference benchmarks
Benchmark	Nemotron 3.5 Lightning	Solar Pro4
LMArena Text	1324	1386
LMArena Creative Writing	1254	1313
LMArena Multi-Turn	1327	1391
EQ-Bench Creative Writing	1280	—

Frequently asked questions

Is Nemotron 3.5 Lightning better than Solar Pro4?

Which is cheaper, Nemotron 3.5 Lightning or Solar Pro4?

Nemotron 3.5 Lightning is cheaper. It lists at $0.06 per million input tokens and $0.16 per million output tokens; Solar Pro4 lists at $0.30 and $1.20.

Is Nemotron 3.5 Lightning or Solar Pro4 better for coding?

They score almost the same on coding (39.6 vs 39.9); test both on your own repository before choosing.

Which has the bigger context window?

Solar Pro4 does, with 524K tokens against 262K.

How many benchmarks do Nemotron 3.5 Lightning and Solar Pro4 share?

17 benchmarks have published results for both models. Nemotron 3.5 Lightning has 18 scored results on Noometry and Solar Pro4 has 18.