Noometry

Model comparison

Grok 4.3 vs Solar Pro4

Grok 4.3 is the stronger model overall, scoring 43.6 to 41.5 on the Noometry Index. Solar Pro4 costs 3.0× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.

Last verified . 18 shared benchmarks.

Grok 4.3 xAI

43.6

Rank #80 Confirmed

Solar Pro4 Upstage

41.5

Rank #123 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Grok 4.3 scores higher in 7 categories and Solar Pro4 in 1 category; 6 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 39.0.
  • Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
  • Grok 4.3 accepts more context: 1M tokens versus 524K.

Side by side

Grok 4.3Solar Pro4
ProviderxAIUpstage
Noometry Index43.641.5
Released2026-04-172026-08-06
WeightsProprietaryProprietary
Context window1M524K
Max output30K131K
Input $ / M tokens$1.25$0.30
Output $ / M tokens$2.50$1.20
Results tracked4018

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Category by category

Coding Grok 4.3 leads

Grok 4.3: 41.3 (#117), Solar Pro4: 39.9 (#135)

BenchmarkGrok 4.3Solar Pro4
LMArena WebDev13571371
LMArena Coding14151439
SciCode47.3%—
WeirdML49.9%—
ALE-Bench944.17—

Agentic & Tool Use Not comparable

Grok 4.3: 27.6 (#93), Solar Pro4: —

BenchmarkGrok 4.3Solar Pro4
GDP.pdf8%—
LMArena Search1165—
Vending-Bench 235.26—

Reasoning Grok 4.3 leads

Grok 4.3: 34.9 (#60), Solar Pro4: 27.3 (#107)

BenchmarkGrok 4.3Solar Pro4
LMArena Hard Prompts13971398
NYT Connections (extended)55.2%—
CritPt8%—
Chess Puzzles25%—
DTBench90.7%—
LMCA38.3%—
Epoch Capabilities Index149.13—
ForecastBench60.3—

Math Grok 4.3 leads

Grok 4.3: 45.8 (#60), Solar Pro4: 36.1 (#129)

BenchmarkGrok 4.3Solar Pro4
LMArena Math13881418
FrontierMath (Tiers 1-3)42.8%—
FrontierMath Tier 414.6%—
OTIS Mock AIME 2024-202593.3%—
ProofBench11%—

Knowledge Grok 4.3 leads

Grok 4.3: 52.5 (#57), Solar Pro4: 39.0 (#128)

BenchmarkGrok 4.3Solar Pro4
LMArena Expert13851421
GPQA Diamond88.8%—
SimpleQA Verified33.2%—

Multimodal Not comparable

Grok 4.3: 31.6 (#96), Solar Pro4: —

BenchmarkGrok 4.3Solar Pro4
LMArena Vision1231—
Blueprint-Bench 20%—

Multilingual Grok 4.3 leads

Grok 4.3: 50.7 (#114), Solar Pro4: 49.0 (#134)

BenchmarkGrok 4.3Solar Pro4
LMArena Non-English13851362
LMArena Chinese14231417
LMArena French14121403
LMArena German13951351
LMArena Japanese13791300
LMArena Korean13571383
LMArena Russian13991360
LMArena Spanish14021408

Instruction Following Too close to call

Grok 4.3: 72.3 (#135), Solar Pro4: 72.8 (#128)

BenchmarkGrok 4.3Solar Pro4
LMArena Instruction Following13661376

Long Context Too close to call

Grok 4.3: 42.5 (#118), Solar Pro4: 42.0 (#125)

BenchmarkGrok 4.3Solar Pro4
LMArena Longer Query13931379

Writing & Preference Grok 4.3 leads

Grok 4.3: 58.6 (#112), Solar Pro4: 56.7 (#133)

BenchmarkGrok 4.3Solar Pro4
LMArena Text13971386
LMArena Creative Writing13801313
LMArena Multi-Turn14061391
EQ-Bench 41075—

Frequently asked questions

Is Grok 4.3 better than Solar Pro4?

Grok 4.3 is the stronger model overall, scoring 43.6 to 41.5 on the Noometry Index. Solar Pro4 costs 3.0× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.

Which is cheaper, Grok 4.3 or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.

Is Grok 4.3 or Solar Pro4 better for coding?

Grok 4.3 scores higher on coding benchmarks: 41.3 versus 39.9 in the Noometry coding category.

Which has the bigger context window?

Grok 4.3 does, with 1M tokens against 524K.

How many benchmarks do Grok 4.3 and Solar Pro4 share?

18 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and Solar Pro4 has 18.

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