Noometry

Model comparison

GPT-5.4 Pro vs GPT-6 Sol

GPT-6 Sol is the stronger model overall, scoring 61.8 to 58.9 on the Noometry Index.

Last verified . 9 shared benchmarks.

GPT-5.4 Pro OpenAI

58.9

Rank #18 Confirmed

GPT-6 Sol OpenAI

61.8

Rank #12 Confirmed

Summary

  • They share 9 benchmarks with published results for both. GPT-5.4 Pro scores higher in 1 category and GPT-6 Sol in 3 categories; 4 gaps are clear of the uncertainty.
  • The widest gap is in coding, where GPT-6 Sol leads 60.1 to 43.2.
  • The biggest single-benchmark swing is FrontierMath Tier 4: 58.5% for GPT-5.4 Pro and 90% for GPT-6 Sol.
  • GPT-6 Sol is cheaper at $2 / $10 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.

Side by side

GPT-5.4 ProGPT-6 Sol
ProviderOpenAIOpenAI
Noometry Index58.961.8
Released2026-03-052026-09-22
WeightsProprietaryProprietary
Context window1.05M1.05M
Max output128K128K
Input $ / M tokens$30$2
Output $ / M tokens$180$10
Results tracked1645

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Category by category

Coding GPT-6 Sol leads

GPT-5.4 Pro: 43.2 (#90), GPT-6 Sol: 60.1 (#11)

BenchmarkGPT-5.4 ProGPT-6 Sol
DeepSWE—68.8%
FrontierCode—49.3%
LMArena WebDev—1688
SciCode—57.6%
WeirdML57.4%—
LMArena Coding—1447
ALE-Bench—2,462

Agentic & Tool Use Not comparable

GPT-5.4 Pro: —, GPT-6 Sol: 37.2 (#36)

BenchmarkGPT-5.4 ProGPT-6 Sol
APEX-Agents—54.3%
GDP.pdf—26.4%
Vending-Bench 2—14,428

Reasoning GPT-6 Sol leads

GPT-5.4 Pro: 70.7 (#13), GPT-6 Sol: 74.0 (#9)

BenchmarkGPT-5.4 ProGPT-6 Sol
ARC-AGI-283.3%89.6%
ARC-AGI-194.5%95.5%
CritPt30%30.9%
Epoch Capabilities Index158.93162.72
SimpleBench74.1%—
NYT Connections (extended)—90.1%
Chess Puzzles58.6%—
EnigmaEval23.8%—
EBR-Bench—53.3%
LMArena Hard Prompts—1418
Mystery Game Puzzles—56%
DTBench—97.3%
LMCA—59.1%

Math GPT-6 Sol leads

GPT-5.4 Pro: 72.4 (#22), GPT-6 Sol: 87.2 (#7)

BenchmarkGPT-5.4 ProGPT-6 Sol
FrontierMath (Tiers 1-3)82.5%89.8%
FrontierMath Tier 458.5%90%
OTIS Mock AIME 2024-2025—100%
ProofBench—83%
LMArena Math—1402
FrontierMath (Feb 2025 set)50%—
FrontierMath Tier 4 (v1)37.5%—

Knowledge GPT-5.4 Pro leads

GPT-5.4 Pro: 68.3 (#7), GPT-6 Sol: 64.8 (#15)

BenchmarkGPT-5.4 ProGPT-6 Sol
GPQA Diamond94.6%94.3%
SimpleQA Verified46.3%60.7%
Vectara Hallucination Rate8.3%6.5%
Humanity's Last Exam44.3%—
LMArena Expert—1439

Multimodal Not comparable

GPT-5.4 Pro: —, GPT-6 Sol: 47.6 (#10)

BenchmarkGPT-5.4 ProGPT-6 Sol
LMArena Vision—1245
Blueprint-Bench 2—36.9%
Furniture Assembly—58.3%

Multilingual Not comparable

GPT-5.4 Pro: —, GPT-6 Sol: 50.5 (#118)

BenchmarkGPT-5.4 ProGPT-6 Sol
LMArena Non-English—1385
LMArena Chinese—1405
LMArena French—1410
LMArena German—1390
LMArena Japanese—1385
LMArena Korean—1341
LMArena Russian—1401
LMArena Spanish—1384

Instruction Following Not comparable

GPT-5.4 Pro: —, GPT-6 Sol: 74.5 (#94)

BenchmarkGPT-5.4 ProGPT-6 Sol
LMArena Instruction Following—1412

Long Context Not comparable

GPT-5.4 Pro: —, GPT-6 Sol: 43.1 (#108)

BenchmarkGPT-5.4 ProGPT-6 Sol
LMArena Longer Query—1411

Writing & Preference Not comparable

GPT-5.4 Pro: —, GPT-6 Sol: 71.9 (#18)

BenchmarkGPT-5.4 ProGPT-6 Sol
LMArena Text—1395
LMArena Creative Writing—1378
EQ-Bench Creative Writing—2125
LMArena Multi-Turn—1412

Frequently asked questions

Is GPT-5.4 Pro better than GPT-6 Sol?

GPT-6 Sol is the stronger model overall, scoring 61.8 to 58.9 on the Noometry Index.

Which is cheaper, GPT-5.4 Pro or GPT-6 Sol?

GPT-6 Sol is cheaper. It lists at $2 per million input tokens and $10 per million output tokens; GPT-5.4 Pro lists at $30 and $180.

Is GPT-5.4 Pro or GPT-6 Sol better for coding?

GPT-6 Sol scores higher on coding benchmarks: 60.1 versus 43.2 in the Noometry coding category.

Which has the bigger context window?

Both accept 1.05M tokens.

How many benchmarks do GPT-5.4 Pro and GPT-6 Sol share?

9 benchmarks have published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and GPT-6 Sol has 45.

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