Noometry

Model comparison

GPT-5.2 Pro vs Grok 4.3

GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 43.6 on the Noometry Index. Grok 4.3 costs 37× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

Last verified . 4 shared benchmarks.

GPT-5.2 Pro OpenAI

52.2

Rank #34 Reported

Grok 4.3 xAI

43.6

Rank #80 Confirmed

Summary

  • They share 4 benchmarks with published results for both. GPT-5.2 Pro scores higher in 2 categories and Grok 4.3 in 0 categories; 2 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-5.2 Pro leads 64.8 to 45.8.
  • The biggest single-benchmark swing is FrontierMath Tier 4: 46% for GPT-5.2 Pro and 14.6% for Grok 4.3.
  • Grok 4.3 is cheaper at $1.25 / $2.50 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
  • Grok 4.3 accepts more context: 1M tokens versus 400K.

Side by side

GPT-5.2 ProGrok 4.3
ProviderOpenAIxAI
Noometry Index52.243.6
Released2025-12-112026-04-17
WeightsProprietaryProprietary
Context window400K1M
Max output128K30K
Input $ / M tokens$21$1.25
Output $ / M tokens$168$2.50
Results tracked840

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Category by category

Coding Not comparable

GPT-5.2 Pro: —, Grok 4.3: 41.3 (#117)

BenchmarkGPT-5.2 ProGrok 4.3
LMArena WebDev—1357
SciCode—47.3%
WeirdML—49.9%
LMArena Coding—1415
ALE-Bench—944.17

Agentic & Tool Use Not comparable

GPT-5.2 Pro: —, Grok 4.3: 27.6 (#93)

BenchmarkGPT-5.2 ProGrok 4.3
GDP.pdf—8%
LMArena Search—1165
Vending-Bench 2—35.26

Reasoning GPT-5.2 Pro leads

GPT-5.2 Pro: 51.8 (#31), Grok 4.3: 34.9 (#60)

BenchmarkGPT-5.2 ProGrok 4.3
NYT Connections (extended)79.3%55.2%
Epoch Capabilities Index155.41149.13
ARC-AGI-254.2%—
SimpleBench57.4%—
ARC-AGI-190.5%—
CritPt—8%
Chess Puzzles—25%
LMArena Hard Prompts—1397
DTBench—90.7%
LMCA—38.3%
ForecastBench—60.3

Math GPT-5.2 Pro leads

GPT-5.2 Pro: 64.8 (#23), Grok 4.3: 45.8 (#60)

BenchmarkGPT-5.2 ProGrok 4.3
FrontierMath (Tiers 1-3)74%42.8%
FrontierMath Tier 446%14.6%
OTIS Mock AIME 2024-2025—93.3%
ProofBench—11%
LMArena Math—1388
FrontierMath Tier 4 (v1)31.3%—

Knowledge Not comparable

GPT-5.2 Pro: —, Grok 4.3: 52.5 (#57)

BenchmarkGPT-5.2 ProGrok 4.3
GPQA Diamond—88.8%
SimpleQA Verified—33.2%
LMArena Expert—1385

Multimodal Not comparable

GPT-5.2 Pro: —, Grok 4.3: 31.6 (#96)

BenchmarkGPT-5.2 ProGrok 4.3
LMArena Vision—1231
Blueprint-Bench 2—0%

Multilingual Not comparable

GPT-5.2 Pro: —, Grok 4.3: 50.7 (#114)

BenchmarkGPT-5.2 ProGrok 4.3
LMArena Non-English—1385
LMArena Chinese—1423
LMArena French—1412
LMArena German—1395
LMArena Japanese—1379
LMArena Korean—1357
LMArena Russian—1399
LMArena Spanish—1402

Instruction Following Not comparable

GPT-5.2 Pro: —, Grok 4.3: 72.3 (#135)

BenchmarkGPT-5.2 ProGrok 4.3
LMArena Instruction Following—1366

Long Context Not comparable

GPT-5.2 Pro: —, Grok 4.3: 42.5 (#118)

BenchmarkGPT-5.2 ProGrok 4.3
LMArena Longer Query—1393

Writing & Preference Not comparable

GPT-5.2 Pro: —, Grok 4.3: 58.6 (#112)

BenchmarkGPT-5.2 ProGrok 4.3
LMArena Text—1397
LMArena Creative Writing—1380
EQ-Bench 4—1075
LMArena Multi-Turn—1406

Frequently asked questions

Is GPT-5.2 Pro better than Grok 4.3?

GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 43.6 on the Noometry Index. Grok 4.3 costs 37× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

Which is cheaper, GPT-5.2 Pro or Grok 4.3?

Grok 4.3 is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; GPT-5.2 Pro lists at $21 and $168.

Which has the bigger context window?

Grok 4.3 does, with 1M tokens against 400K.

How many benchmarks do GPT-5.2 Pro and Grok 4.3 share?

4 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Grok 4.3 has 40.

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