Noometry

Model comparison

Grok 4.5 vs Kimi K2.7 Code

Grok 4.5 is the stronger model overall, scoring 55.0 to 43.3 on the Noometry Index. Kimi K2.7 Code costs 1.8× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

Last verified . 19 shared benchmarks.

Grok 4.5 xAI

55.0

Rank #25 Confirmed

Kimi K2.7 Code Moonshot AI

43.3

Rank #94 Confirmed

Summary

  • They share 19 benchmarks with published results for both. Grok 4.5 scores higher in 5 categories and Kimi K2.7 Code in 0 categories; 5 gaps are clear of the uncertainty.
  • The widest gap is in agentic & tool use, where Grok 4.5 leads 44.4 to 24.0.
  • The biggest single-benchmark swing is GBAEval: 65.4% for Grok 4.5 and 0.9% for Kimi K2.7 Code.
  • Kimi K2.7 Code is cheaper at $0.95 / $4 per million input/output tokens, against $2 / $6 for Grok 4.5.
  • Grok 4.5 accepts more context: 500K tokens versus 262K.
  • Kimi K2.7 Code has downloadable open weights; the other is API-only.

Side by side

Grok 4.5Kimi K2.7 Code
ProviderxAIMoonshot AI
Noometry Index55.043.3
Released2026-07-082026-06-12
WeightsProprietaryOpen
Context window500K262K
Max output500K262K
Input $ / M tokens$2$0.95
Output $ / M tokens$6$4
Results tracked5219

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Grok 4.5 leads

Grok 4.5: 52.2 (#35), Kimi K2.7 Code: 42.9 (#95)

BenchmarkGrok 4.5Kimi K2.7 Code
DeepSWE53.8%30.5%
FrontierCode42.4%30.1%
LMArena WebDev15531473
SciCode54.1%47.5%
WeirdML46.4%54.1%
ALE-Bench1,309886.23
LMArena Coding1474—

Agentic & Tool Use Grok 4.5 leads

Grok 4.5: 44.4 (#17), Kimi K2.7 Code: 24.0 (#122)

BenchmarkGrok 4.5Kimi K2.7 Code
APEX-Agents56.2%37.6%
GBAEval65.4%0.9%
Vending-Bench 23,8875,083
τ²-bench Banking47.9%—
PostTrainBench23.4%—
GDP.pdf14%—
LMArena Search1213—

Reasoning Grok 4.5 leads

Grok 4.5: 56.1 (#25), Kimi K2.7 Code: 39.0 (#61)

BenchmarkGrok 4.5Kimi K2.7 Code
SimpleBench70%57.9%
CritPt15.4%10%
Chess Puzzles36%21%
Surface Evolver Bench74.4%48.8%
Epoch Capabilities Index153.92149.97
ARC-AGI-252.6%—
Kagi LLM Benchmark83.5%—
NYT Connections (extended)79.9%—
ARC-AGI-187.2%—
LMArena Hard Prompts1462—
DTBench96.5%—
LMCA45.2%—

Math Grok 4.5 leads

Grok 4.5: 60.9 (#35), Kimi K2.7 Code: 52.9 (#48)

BenchmarkGrok 4.5Kimi K2.7 Code
FrontierMath (Tiers 1-3)57.2%54%
FrontierMath Tier 424.4%12.2%
OTIS Mock AIME 2024-202597.8%95.6%
ProofBench31%—
LMArena Math1459—

Knowledge Grok 4.5 leads

Grok 4.5: 62.3 (#24), Kimi K2.7 Code: 53.5 (#57)

BenchmarkGrok 4.5Kimi K2.7 Code
GPQA Diamond93.4%87.9%
SimpleQA Verified48.3%36.5%
LMArena Expert1466—

Multimodal Not comparable

Grok 4.5: 37.6 (#72), Kimi K2.7 Code: —

BenchmarkGrok 4.5Kimi K2.7 Code
LMArena Vision1288—
Blueprint-Bench 227.3%—
Furniture Assembly22.5%—
LMArena Document1452—

Multilingual Not comparable

Grok 4.5: 54.4 (#42), Kimi K2.7 Code: —

BenchmarkGrok 4.5Kimi K2.7 Code
LMArena Non-English1440—
LMArena Chinese1496—
LMArena French1456—
LMArena German1446—
LMArena Japanese1428—
LMArena Korean1404—
LMArena Russian1448—
LMArena Spanish1450—

Instruction Following Not comparable

Grok 4.5: 76.0 (#48), Kimi K2.7 Code: —

BenchmarkGrok 4.5Kimi K2.7 Code
LMArena Instruction Following1446—

Long Context Not comparable

Grok 4.5: 44.8 (#56), Kimi K2.7 Code: —

BenchmarkGrok 4.5Kimi K2.7 Code
LMArena Longer Query1463—

Writing & Preference Not comparable

Grok 4.5: 65.8 (#42), Kimi K2.7 Code: —

BenchmarkGrok 4.5Kimi K2.7 Code
LMArena Text1448—
LMArena Creative Writing1442—
EQ-Bench Creative Writing1579—
LMArena Multi-Turn1456—

Frequently asked questions

Is Grok 4.5 better than Kimi K2.7 Code?

Grok 4.5 is the stronger model overall, scoring 55.0 to 43.3 on the Noometry Index. Kimi K2.7 Code costs 1.8× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

Which is cheaper, Grok 4.5 or Kimi K2.7 Code?

Kimi K2.7 Code is cheaper. It lists at $0.95 per million input tokens and $4 per million output tokens; Grok 4.5 lists at $2 and $6.

Is Grok 4.5 or Kimi K2.7 Code better for coding?

Grok 4.5 scores higher on coding benchmarks: 52.2 versus 42.9 in the Noometry coding category.

Which has the bigger context window?

Grok 4.5 does, with 500K tokens against 262K.

How many benchmarks do Grok 4.5 and Kimi K2.7 Code share?

19 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Kimi K2.7 Code has 19.

Related comparisons

Go deeper