Noometry

Model comparison

GPT-6 Luna vs Grok Build 0.1

GPT-6 Luna is the stronger model overall, scoring 53.3 to 36.4 on the Noometry Index.

Last verified . 2 shared benchmarks.

GPT-6 Luna OpenAI

53.3

Rank #36 Confirmed

Grok Build 0.1 xAI

36.4

Rank #216 Reported

Summary

  • They share 2 benchmarks with published results for both. GPT-6 Luna scores higher in 3 categories and Grok Build 0.1 in 0 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where GPT-6 Luna leads 48.2 to 32.2.
  • The biggest single-benchmark swing is CritPt: 19.4% for GPT-6 Luna and 9.1% for Grok Build 0.1.
  • GPT-6 Luna is cheaper at $0.10 / $0.50 per million input/output tokens, against $1 / $2 for Grok Build 0.1.
  • GPT-6 Luna accepts more context: 1.05M tokens versus 256K.

Side by side

GPT-6 LunaGrok Build 0.1
ProviderOpenAIxAI
Noometry Index53.336.4
Released2026-09-222026-04-16
WeightsProprietaryProprietary
Context window1.05M256K
Max output128K256K
Input $ / M tokens$0.10$1
Output $ / M tokens$0.50$2
Results tracked423

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Category by category

Coding GPT-6 Luna leads

GPT-6 Luna: 55.5 (#25), Grok Build 0.1: 43.1 (#91)

BenchmarkGPT-6 LunaGrok Build 0.1
SciCode54.6%50.2%
DeepSWE66.6%—
FrontierCode42.4%—
LMArena WebDev1581—
LMArena Coding1439—
ALE-Bench1,577—

Agentic & Tool Use GPT-6 Luna leads

GPT-6 Luna: 33.3 (#54), Grok Build 0.1: 22.7 (#129)

BenchmarkGPT-6 LunaGrok Build 0.1
APEX-Agents44.3%—
GBAEval—2.4%
GDP.pdf23%—

Reasoning GPT-6 Luna leads

GPT-6 Luna: 48.2 (#41), Grok Build 0.1: 32.2 (#77)

BenchmarkGPT-6 LunaGrok Build 0.1
CritPt19.4%9.1%
ARC-AGI-259.3%—
NYT Connections (extended)68.7%—
ARC-AGI-186.7%—
Chess Puzzles31%—
LMArena Hard Prompts1411—
Mystery Game Puzzles7%—
DTBench90.1%—
LMCA44.5%—
Epoch Capabilities Index156.28—

Math Not comparable

GPT-6 Luna: 76.1 (#15), Grok Build 0.1: —

BenchmarkGPT-6 LunaGrok Build 0.1
FrontierMath (Tiers 1-3)78.9%—
FrontierMath Tier 456.1%—
OTIS Mock AIME 2024-202598.9%—
ProofBench64%—
LMArena Math1416—

Knowledge Not comparable

GPT-6 Luna: 57.0 (#41), Grok Build 0.1: —

BenchmarkGPT-6 LunaGrok Build 0.1
GPQA Diamond90.5%—
SimpleQA Verified41.4%—
LMArena Expert1444—

Multimodal Not comparable

GPT-6 Luna: 42.4 (#30), Grok Build 0.1: —

BenchmarkGPT-6 LunaGrok Build 0.1
LMArena Vision1217—
Blueprint-Bench 231.2%—
Furniture Assembly44.2%—

Multilingual Not comparable

GPT-6 Luna: 50.5 (#117), Grok Build 0.1: —

BenchmarkGPT-6 LunaGrok Build 0.1
LMArena Non-English1386—
LMArena Chinese1433—
LMArena French1420—
LMArena German1369—
LMArena Japanese1369—
LMArena Korean1360—
LMArena Russian1394—
LMArena Spanish1393—

Instruction Following Not comparable

GPT-6 Luna: 74.3 (#99), Grok Build 0.1: —

BenchmarkGPT-6 LunaGrok Build 0.1
LMArena Instruction Following1409—

Long Context Not comparable

GPT-6 Luna: 43.0 (#111), Grok Build 0.1: —

BenchmarkGPT-6 LunaGrok Build 0.1
LMArena Longer Query1409—

Writing & Preference Not comparable

GPT-6 Luna: 58.3 (#119), Grok Build 0.1: —

BenchmarkGPT-6 LunaGrok Build 0.1
LMArena Text1391—
LMArena Creative Writing1363—
LMArena Multi-Turn1396—

Frequently asked questions

Is GPT-6 Luna better than Grok Build 0.1?

GPT-6 Luna is the stronger model overall, scoring 53.3 to 36.4 on the Noometry Index.

Which is cheaper, GPT-6 Luna or Grok Build 0.1?

GPT-6 Luna is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; Grok Build 0.1 lists at $1 and $2.

Is GPT-6 Luna or Grok Build 0.1 better for coding?

GPT-6 Luna scores higher on coding benchmarks: 55.5 versus 43.1 in the Noometry coding category.

Which has the bigger context window?

GPT-6 Luna does, with 1.05M tokens against 256K.

How many benchmarks do GPT-6 Luna and Grok Build 0.1 share?

2 benchmarks have published results for both models. GPT-6 Luna has 42 scored results on Noometry and Grok Build 0.1 has 3.

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