Noometry

Model comparison

Kimi K2.6 vs Muse Spark 1.3

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 47.7 on the Noometry Index.

Last verified . 34 shared benchmarks.

Kimi K2.6 Moonshot AI

47.7

Rank #60 Confirmed

Muse Spark 1.3 Meta

54.8

Rank #27 Confirmed

Summary

  • They share 34 benchmarks with published results for both. Kimi K2.6 scores higher in 1 category and Muse Spark 1.3 in 9 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in agentic & tool use, where Muse Spark 1.3 leads 38.6 to 21.9.
  • The biggest single-benchmark swing is ProofBench: 16% for Kimi K2.6 and 58% for Muse Spark 1.3.
  • Kimi K2.6 is cheaper at $0.95 / $4 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.3.
  • Muse Spark 1.3 accepts more context: 1.05M tokens versus 262K.
  • Kimi K2.6 has downloadable open weights; the other is API-only.

Side by side

Kimi K2.6Muse Spark 1.3
ProviderMoonshot AIMeta
Noometry Index47.754.8
Released2026-04-202026-09-02
WeightsOpenProprietary
Context window262K1.05M
Max output262K131K
Input $ / M tokens$0.95$1.25
Output $ / M tokens$4$4.25
Results tracked5137

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Category by category

Coding Muse Spark 1.3 leads

Kimi K2.6: 50.7 (#43), Muse Spark 1.3: 56.6 (#21)

BenchmarkKimi K2.6Muse Spark 1.3
LMArena WebDev15091657
SciCode53.5%59.7%
LMArena Coding14881514
SWE-bench Verified76.7%—
CursorBench—41.6%
WeirdML55.9%—
ALE-Bench1,093—

Agentic & Tool Use Muse Spark 1.3 leads

Kimi K2.6: 21.9 (#137), Muse Spark 1.3: 38.6 (#30)

BenchmarkKimi K2.6Muse Spark 1.3
GDP.pdf12%27.6%
APEX-Agents—57.8%
OSWorld 2.04.6%—
ExploitBench18.4%—
GBAEval0.9%—
Vending-Bench 26,205—

Reasoning Muse Spark 1.3 leads

Kimi K2.6: 40.5 (#55), Muse Spark 1.3: 54.0 (#27)

BenchmarkKimi K2.6Muse Spark 1.3
NYT Connections (extended)87.2%85.1%
CritPt8%26%
Chess Puzzles26%38%
LMArena Hard Prompts14701503
Mystery Game Puzzles18%25%
DTBench90.9%96.5%
LMCA37.3%53.9%
Epoch Capabilities Index151.05156.75
EBR-Bench2.4%—
Bench to the Future 3—0.14

Math Muse Spark 1.3 leads

Kimi K2.6: 57.0 (#41), Muse Spark 1.3: 73.1 (#21)

BenchmarkKimi K2.6Muse Spark 1.3
FrontierMath (Tiers 1-3)57.2%74.4%
FrontierMath Tier 425.6%46.3%
OTIS Mock AIME 2024-202596.1%99.2%
ProofBench16%58%
LMArena Math14751494
MathArena Final-Answer Competitions72.9%—
FrontierMath (Feb 2025 set)39%—
FrontierMath Tier 4 (v1)14.6%—

Knowledge Kimi K2.6 leads

Kimi K2.6: 54.0 (#54), Muse Spark 1.3: 42.6 (#95)

BenchmarkKimi K2.6Muse Spark 1.3
LMArena Expert14911516
GPQA Diamond90.8%—
SimpleQA Verified34.9%—
Vectara Hallucination Rate10.8%—

Multimodal Muse Spark 1.3 leads

Kimi K2.6: 31.6 (#103), Muse Spark 1.3: 43.7 (#22)

BenchmarkKimi K2.6Muse Spark 1.3
LMArena Vision12831309
LMArena Document14511471
Blueprint-Bench 23.9%—
Furniture Assembly21.7%—

Multilingual Muse Spark 1.3 leads

Kimi K2.6: 54.9 (#37), Muse Spark 1.3: 57.4 (#8)

BenchmarkKimi K2.6Muse Spark 1.3
LMArena Non-English14461481
LMArena Chinese15211529
LMArena French14711524
LMArena German14501515
LMArena Japanese14431474
LMArena Korean14271501
LMArena Russian14461490
LMArena Spanish14641490

Instruction Following Muse Spark 1.3 leads

Kimi K2.6: 76.3 (#43), Muse Spark 1.3: 77.5 (#22)

BenchmarkKimi K2.6Muse Spark 1.3
LMArena Instruction Following14511477

Long Context Too close to call

Kimi K2.6: 44.9 (#52), Muse Spark 1.3: 45.6 (#32)

BenchmarkKimi K2.6Muse Spark 1.3
LMArena Longer Query14681488

Writing & Preference Muse Spark 1.3 leads

Kimi K2.6: 68.5 (#26), Muse Spark 1.3: 73.6 (#9)

BenchmarkKimi K2.6Muse Spark 1.3
LMArena Text14551490
LMArena Creative Writing14341455
EQ-Bench Creative Writing17251906
LMArena Multi-Turn14531482
EQ-Bench 41202—

Frequently asked questions

Is Kimi K2.6 better than Muse Spark 1.3?

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 47.7 on the Noometry Index.

Which is cheaper, Kimi K2.6 or Muse Spark 1.3?

Kimi K2.6 is cheaper. It lists at $0.95 per million input tokens and $4 per million output tokens; Muse Spark 1.3 lists at $1.25 and $4.25.

Is Kimi K2.6 or Muse Spark 1.3 better for coding?

Muse Spark 1.3 scores higher on coding benchmarks: 56.6 versus 50.7 in the Noometry coding category.

Which has the bigger context window?

Muse Spark 1.3 does, with 1.05M tokens against 262K.

How many benchmarks do Kimi K2.6 and Muse Spark 1.3 share?

34 benchmarks have published results for both models. Kimi K2.6 has 51 scored results on Noometry and Muse Spark 1.3 has 37.

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