Noometry

Model comparison

GPT-6 Luna vs Solar Pro4

GPT-6 Luna is the stronger model overall, scoring 53.3 to 42.1 on the Noometry Index.

Last verified . 18 shared benchmarks.

GPT-6 Luna OpenAI

53.3

Rank #36 Confirmed

Solar Pro4 Upstage

42.1

Rank #121 Confirmed

Summary

  • They share 18 benchmarks with published results for both. GPT-6 Luna scores higher in 8 categories and Solar Pro4 in 0 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-6 Luna leads 76.1 to 38.8.
  • GPT-6 Luna is cheaper at $0.10 / $0.50 per million input/output tokens, against $0.30 / $1.20 for Solar Pro4.
  • GPT-6 Luna accepts more context: 1.05M tokens versus 524K.

Side by side

GPT-6 LunaSolar Pro4
ProviderOpenAIUpstage
Noometry Index53.342.1
Released2026-09-222026-08-06
WeightsProprietaryProprietary
Context window1.05M524K
Max output128K131K
Input $ / M tokens$0.10$0.30
Output $ / M tokens$0.50$1.20
Results tracked4218

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Category by category

Coding GPT-6 Luna leads

GPT-6 Luna: 55.5 (#25), Solar Pro4: 40.1 (#149)

BenchmarkGPT-6 LunaSolar Pro4
LMArena WebDev15811371
LMArena Coding14391437
DeepSWE66.6%—
FrontierCode42.4%—
SciCode54.6%—
ALE-Bench1,577—

Agentic & Tool Use Not comparable

GPT-6 Luna: 33.3 (#54), Solar Pro4: —

BenchmarkGPT-6 LunaSolar Pro4
APEX-Agents44.3%—
GDP.pdf23%—

Reasoning GPT-6 Luna leads

GPT-6 Luna: 48.2 (#41), Solar Pro4: 28.5 (#104)

BenchmarkGPT-6 LunaSolar Pro4
LMArena Hard Prompts14111399
ARC-AGI-259.3%—
NYT Connections (extended)68.7%—
ARC-AGI-186.7%—
CritPt19.4%—
Chess Puzzles31%—
Mystery Game Puzzles7%—
DTBench90.1%—
LMCA44.5%—
Epoch Capabilities Index156.28—

Math GPT-6 Luna leads

GPT-6 Luna: 76.1 (#15), Solar Pro4: 38.8 (#128)

BenchmarkGPT-6 LunaSolar Pro4
LMArena Math14161416
FrontierMath (Tiers 1-3)78.9%—
FrontierMath Tier 456.1%—
OTIS Mock AIME 2024-202598.9%—
ProofBench64%—

Knowledge GPT-6 Luna leads

GPT-6 Luna: 57.0 (#41), Solar Pro4: 39.8 (#129)

BenchmarkGPT-6 LunaSolar Pro4
LMArena Expert14441427
GPQA Diamond90.5%—
SimpleQA Verified41.4%—

Multimodal Not comparable

GPT-6 Luna: 42.4 (#30), Solar Pro4: —

BenchmarkGPT-6 LunaSolar Pro4
LMArena Vision1217—
Blueprint-Bench 231.2%—
Furniture Assembly44.2%—

Multilingual GPT-6 Luna leads

GPT-6 Luna: 50.5 (#117), Solar Pro4: 48.7 (#139)

BenchmarkGPT-6 LunaSolar Pro4
LMArena Non-English13861361
LMArena Chinese14331415
LMArena French14201397
LMArena German13691364
LMArena Japanese13691309
LMArena Korean13601382
LMArena Russian13941360
LMArena Spanish13931401

Instruction Following GPT-6 Luna leads

GPT-6 Luna: 74.3 (#99), Solar Pro4: 72.7 (#132)

BenchmarkGPT-6 LunaSolar Pro4
LMArena Instruction Following14091377

Long Context Too close to call

GPT-6 Luna: 43.0 (#111), Solar Pro4: 42.1 (#130)

BenchmarkGPT-6 LunaSolar Pro4
LMArena Longer Query14091381

Writing & Preference GPT-6 Luna leads

GPT-6 Luna: 58.3 (#119), Solar Pro4: 56.5 (#138)

BenchmarkGPT-6 LunaSolar Pro4
LMArena Text13911386
LMArena Creative Writing13631316
LMArena Multi-Turn13961385

Frequently asked questions

Is GPT-6 Luna better than Solar Pro4?

GPT-6 Luna is the stronger model overall, scoring 53.3 to 42.1 on the Noometry Index.

Which is cheaper, GPT-6 Luna or Solar Pro4?

GPT-6 Luna is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; Solar Pro4 lists at $0.30 and $1.20.

Is GPT-6 Luna or Solar Pro4 better for coding?

GPT-6 Luna scores higher on coding benchmarks: 55.5 versus 40.1 in the Noometry coding category.

Which has the bigger context window?

GPT-6 Luna does, with 1.05M tokens against 524K.

How many benchmarks do GPT-6 Luna and Solar Pro4 share?

18 benchmarks have published results for both models. GPT-6 Luna has 42 scored results on Noometry and Solar Pro4 has 18.

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