Noometry

Model comparison

Gemini 4 Argon vs Kimi K2.5

Gemini 4 Argon is the stronger model overall, scoring 56.5 to 48.1 on the Noometry Index.

Last verified . 17 shared benchmarks.

Gemini 4 Argon Google

56.5

Rank #24 Confirmed

Kimi K2.5 Moonshot AI

48.1

Rank #57 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Gemini 4 Argon scores higher in 8 categories and Kimi K2.5 in 2 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where Gemini 4 Argon leads 73.9 to 51.8.
  • The biggest single-benchmark swing is CritPt: 27.1% for Gemini 4 Argon and 3.1% for Kimi K2.5.
  • Kimi K2.5 has downloadable open weights; the other is API-only.

Side by side

Gemini 4 ArgonKimi K2.5
ProviderGoogleMoonshot AI
Noometry Index56.548.1
Released2026-09-302026-01-27
WeightsProprietaryOpen
Context window—262K
Max output—262K
Input $ / M tokens—$0.45
Output $ / M tokens—$2.25
Results tracked2151

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Category by category

Coding Gemini 4 Argon leads

Gemini 4 Argon: 62.0 (#9), Kimi K2.5: 48.8 (#53)

BenchmarkGemini 4 ArgonKimi K2.5
LMArena WebDev16781437
SciCode61.8%49%
LMArena Coding15501474
SWE-bench Verified—73.8%
SWE-bench Verified (bash only)—70.8%
SWE-bench Multilingual—67.3%
FrontierSWE55%—
WeirdML—45.6%
ALE-Bench—821.65

Agentic & Tool Use Gemini 4 Argon leads

Gemini 4 Argon: 49.2 (#8), Kimi K2.5: 34.2 (#48)

BenchmarkGemini 4 ArgonKimi K2.5
Vending-Bench 213,7181,198
Terminal-Bench—43.2%
APEX-Agents82.2%—
OSWorld—63.3%

Reasoning Gemini 4 Argon leads

Gemini 4 Argon: 44.2 (#47), Kimi K2.5: 31.2 (#80)

BenchmarkGemini 4 ArgonKimi K2.5
CritPt27.1%3.1%
LMArena Hard Prompts15481453
ARC-AGI-2—11.8%
SimpleBench—46.8%
Kagi LLM Benchmark—78.5%
NYT Connections (extended)—69.9%
ARC-AGI-1—65.3%
Chess Puzzles—12%
EnigmaEval—3.4%
Thematic Generalization—69.4%
Epoch Capabilities Index—148.03

Math Gemini 4 Argon leads

Gemini 4 Argon: 73.9 (#17), Kimi K2.5: 51.8 (#53)

BenchmarkGemini 4 ArgonKimi K2.5
LMArena Math15361470
MathArena Final-Answer Competitions—62.3%
OTIS Mock AIME 2024-2025—92.2%
ProofBench99%—
FrontierMath (Feb 2025 set)—27.9%
FrontierMath Tier 4 (v1)—4.2%

Knowledge Kimi K2.5 leads

Gemini 4 Argon: 43.9 (#89), Kimi K2.5: 53.6 (#56)

BenchmarkGemini 4 ArgonKimi K2.5
LMArena Expert15531466
GPQA Diamond—87.6%
Humanity's Last Exam—24.4%
SimpleQA Verified—34.3%
Vectara Hallucination Rate—14.2%

Multimodal Gemini 4 Argon leads

Gemini 4 Argon: 46.5 (#14), Kimi K2.5: 41.1 (#39)

BenchmarkGemini 4 ArgonKimi K2.5
LMArena Vision—1269
Blueprint-Bench 254.4%—
LMArena Document—1430

Multilingual Gemini 4 Argon leads

Gemini 4 Argon: 60.3 (#1), Kimi K2.5: 53.9 (#53)

BenchmarkGemini 4 ArgonKimi K2.5
LMArena Non-English15231433
LMArena Chinese16101495
LMArena Russian15371435
LMArena Spanish14971450
LMArena French—1454
LMArena German—1441
LMArena Japanese—1421
LMArena Korean—1410

Instruction Following Gemini 4 Argon leads

Gemini 4 Argon: 80.1 (#2), Kimi K2.5: 75.3 (#64)

BenchmarkGemini 4 ArgonKimi K2.5
LMArena Instruction Following15381431

Long Context Kimi K2.5 leads

Gemini 4 Argon: 47.6 (#15), Kimi K2.5: 52.1 (#7)

BenchmarkGemini 4 ArgonKimi K2.5
LMArena Longer Query15491445
Fiction.LiveBench—86.1%
CL-bench—19.3%
CL-bench Life—13.2%

Writing & Preference Gemini 4 Argon leads

Gemini 4 Argon: 71.4 (#19), Kimi K2.5: 65.1 (#53)

BenchmarkGemini 4 ArgonKimi K2.5
LMArena Text15341445
LMArena Creative Writing15311423
LMArena Multi-Turn15571444
EQ-Bench Creative Writing—1579

Frequently asked questions

Is Gemini 4 Argon better than Kimi K2.5?

Gemini 4 Argon is the stronger model overall, scoring 56.5 to 48.1 on the Noometry Index.

Is Gemini 4 Argon or Kimi K2.5 better for coding?

Gemini 4 Argon scores higher on coding benchmarks: 62.0 versus 48.8 in the Noometry coding category.

How many benchmarks do Gemini 4 Argon and Kimi K2.5 share?

17 benchmarks have published results for both models. Gemini 4 Argon has 21 scored results on Noometry and Kimi K2.5 has 51.

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