Noometry

Model comparison

Kimi K2.5 vs Kimi K2.5 Instant

Kimi K2.5 is the stronger model overall, scoring 47.8 to 42.9 on the Noometry Index.

Last verified . 18 shared benchmarks.

Kimi K2.5 Moonshot AI

47.8

Rank #50 Confirmed

Kimi K2.5 Instant Moonshot AI

42.9

Rank #92 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Kimi K2.5 scores higher in 9 categories and Kimi K2.5 Instant in 0 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in knowledge, where Kimi K2.5 leads 53.6 to 39.5.

Side by side

Kimi K2.5Kimi K2.5 Instant
ProviderMoonshot AIMoonshot AI
Noometry Index47.842.9
Released2026-01-27—
WeightsOpenOpen
Context window262K—
Max output262K—
Input $ / M tokens$0.45—
Output $ / M tokens$2.25—
Results tracked5118

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Category by category

Coding Kimi K2.5 leads

Kimi K2.5: 48.7 (#48), Kimi K2.5 Instant: 42.3 (#95)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena WebDev14361404
LMArena Coding14741483
SWE-bench Verified73.8%—
SWE-bench Verified (bash only)70.8%—
SWE-bench Multilingual67.3%—
SciCode49%—
WeirdML45.6%—
ALE-Bench821.65—

Agentic & Tool Use Not comparable

Kimi K2.5: 34.0 (#44), Kimi K2.5 Instant: —

BenchmarkKimi K2.5Kimi K2.5 Instant
Terminal-Bench43.2%—
OSWorld63.3%—
Vending-Bench 21,198—

Reasoning Kimi K2.5 leads

Kimi K2.5: 31.2 (#74), Kimi K2.5 Instant: 28.5 (#88)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena Hard Prompts14541443
ARC-AGI-211.8%—
SimpleBench46.8%—
Kagi LLM Benchmark78.5%—
NYT Connections (extended)69.9%—
ARC-AGI-165.3%—
CritPt3.1%—
Chess Puzzles12%—
EnigmaEval3.4%—
Thematic Generalization69.4%—
Epoch Capabilities Index148.05—

Math Kimi K2.5 leads

Kimi K2.5: 50.3 (#46), Kimi K2.5 Instant: 36.6 (#105)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena Math14701443
MathArena Final-Answer Competitions62.3%—
OTIS Mock AIME 2024-202592.2%—
FrontierMath (Feb 2025 set)27.9%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Kimi K2.5 leads

Kimi K2.5: 53.6 (#52), Kimi K2.5 Instant: 39.5 (#121)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena Expert14661438
GPQA Diamond87.6%—
Humanity's Last Exam24.4%—
SimpleQA Verified34.3%—
Vectara Hallucination Rate14.2%—

Multimodal Too close to call

Kimi K2.5: 40.4 (#37), Kimi K2.5 Instant: 39.5 (#47)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena Vision12691254
LMArena Document1430—

Multilingual Kimi K2.5 leads

Kimi K2.5: 54.1 (#50), Kimi K2.5 Instant: 52.2 (#89)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena Non-English14331406
LMArena Chinese14951450
LMArena French14541403
LMArena German14411413
LMArena Korean14121378
LMArena Russian14361404
LMArena Spanish14501448
LMArena Japanese1422—

Instruction Following Too close to call

Kimi K2.5: 75.5 (#60), Kimi K2.5 Instant: 75.5 (#61)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena Instruction Following14311430

Long Context Kimi K2.5 leads

Kimi K2.5: 52.1 (#7), Kimi K2.5 Instant: 43.8 (#82)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena Longer Query14451435
Fiction.LiveBench86.1%—
CL-bench19.3%—
CL-bench Life13.2%—

Writing & Preference Kimi K2.5 leads

Kimi K2.5: 65.3 (#51), Kimi K2.5 Instant: 60.8 (#91)

BenchmarkKimi K2.5Kimi K2.5 Instant
LMArena Text14451420
LMArena Creative Writing14231379
LMArena Multi-Turn14441427
EQ-Bench Creative Writing1579—

Frequently asked questions

Is Kimi K2.5 better than Kimi K2.5 Instant?

Kimi K2.5 is the stronger model overall, scoring 47.8 to 42.9 on the Noometry Index.

Is Kimi K2.5 or Kimi K2.5 Instant better for coding?

Kimi K2.5 scores higher on coding benchmarks: 48.7 versus 42.3 in the Noometry coding category.

How many benchmarks do Kimi K2.5 and Kimi K2.5 Instant share?

18 benchmarks have published results for both models. Kimi K2.5 has 51 scored results on Noometry and Kimi K2.5 Instant has 18.

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