Noometry

Model comparison

Grok 4.5 vs Grok 4.6

Grok 4.6 is the stronger model overall, scoring 56.9 to 55.0 on the Noometry Index.

Last verified . 45 shared benchmarks.

Grok 4.5 xAI

55.0

Rank #25 Confirmed

Grok 4.6 xAI

56.9

Rank #21 Confirmed

Summary

  • They share 45 benchmarks with published results for both. Grok 4.5 scores higher in 5 categories and Grok 4.6 in 5 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in coding, where Grok 4.6 leads 58.5 to 52.2.
  • The biggest single-benchmark swing is WeirdML: 46.4% for Grok 4.5 and 67.3% for Grok 4.6.
  • Both cost about the same: $2 input and $6 output per million tokens.

Side by side

Grok 4.5Grok 4.6
ProviderxAIxAI
Noometry Index55.056.9
Released2026-07-082026-08-12
WeightsProprietaryProprietary
Context window500K500K
Max output500K500K
Input $ / M tokens$2$2
Output $ / M tokens$6$6
Results tracked5249

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Category by category

Coding Grok 4.6 leads

Grok 4.5: 52.2 (#35), Grok 4.6: 58.5 (#16)

BenchmarkGrok 4.5Grok 4.6
DeepSWE53.8%67.5%
FrontierCode42.4%48%
LMArena WebDev15531617
SciCode54.1%56.5%
WeirdML46.4%67.3%
LMArena Coding14741465
ALE-Bench1,3091,508
CursorBench—41.4%
FrontierSWE—25.3%

Agentic & Tool Use Grok 4.5 leads

Grok 4.5: 44.4 (#17), Grok 4.6: 39.4 (#27)

BenchmarkGrok 4.5Grok 4.6
APEX-Agents56.2%65.3%
GDP.pdf14%17.2%
Vending-Bench 23,8879,047
τ²-bench Banking47.9%—
PostTrainBench23.4%—
GBAEval65.4%—
LMArena Search1213—

Reasoning Grok 4.6 leads

Grok 4.5: 56.1 (#25), Grok 4.6: 61.4 (#20)

BenchmarkGrok 4.5Grok 4.6
ARC-AGI-252.6%67.1%
SimpleBench70%75.9%
NYT Connections (extended)79.9%80%
ARC-AGI-187.2%87.5%
CritPt15.4%19.7%
Chess Puzzles36%40%
LMArena Hard Prompts14621447
DTBench96.5%97.3%
LMCA45.2%48.5%
Epoch Capabilities Index153.92156.44
Kagi LLM Benchmark83.5%—
EBR-Bench—30.5%
Mystery Game Puzzles—34%
Surface Evolver Bench74.4%—

Math Grok 4.6 leads

Grok 4.5: 60.9 (#35), Grok 4.6: 67.0 (#24)

BenchmarkGrok 4.5Grok 4.6
FrontierMath (Tiers 1-3)57.2%66%
FrontierMath Tier 424.4%31.7%
OTIS Mock AIME 2024-202597.8%99.2%
ProofBench31%51%
LMArena Math14591423

Knowledge Grok 4.6 leads

Grok 4.5: 62.3 (#24), Grok 4.6: 63.3 (#20)

BenchmarkGrok 4.5Grok 4.6
GPQA Diamond93.4%94%
SimpleQA Verified48.3%49.3%
LMArena Expert14661467

Multimodal Grok 4.6 leads

Grok 4.5: 37.6 (#72), Grok 4.6: 43.6 (#23)

BenchmarkGrok 4.5Grok 4.6
LMArena Vision12881263
Blueprint-Bench 227.3%33.2%
Furniture Assembly22.5%40%
LMArena Document14521452

Multilingual Grok 4.5 leads

Grok 4.5: 54.4 (#42), Grok 4.6: 53.0 (#74)

BenchmarkGrok 4.5Grok 4.6
LMArena Non-English14401420
LMArena Chinese14961480
LMArena French14561461
LMArena German14461431
LMArena Japanese14281376
LMArena Korean14041397
LMArena Russian14481422
LMArena Spanish14501404

Instruction Following Too close to call

Grok 4.5: 76.0 (#48), Grok 4.6: 75.4 (#63)

BenchmarkGrok 4.5Grok 4.6
LMArena Instruction Following14461431

Long Context Too close to call

Grok 4.5: 44.8 (#56), Grok 4.6: 44.5 (#66)

BenchmarkGrok 4.5Grok 4.6
LMArena Longer Query14631454

Writing & Preference Grok 4.5 leads

Grok 4.5: 65.8 (#42), Grok 4.6: 62.3 (#80)

BenchmarkGrok 4.5Grok 4.6
LMArena Text14481428
LMArena Creative Writing14421428
LMArena Multi-Turn14561425
EQ-Bench Creative Writing1579—

Frequently asked questions

Is Grok 4.5 better than Grok 4.6?

Grok 4.6 is the stronger model overall, scoring 56.9 to 55.0 on the Noometry Index.

Which is cheaper, Grok 4.5 or Grok 4.6?

Grok 4.6 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; Grok 4.5 lists at $2 and $6.

Is Grok 4.5 or Grok 4.6 better for coding?

Grok 4.6 scores higher on coding benchmarks: 58.5 versus 52.2 in the Noometry coding category.

Which has the bigger context window?

Both accept 500K tokens.

How many benchmarks do Grok 4.5 and Grok 4.6 share?

45 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Grok 4.6 has 49.

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