Noometry

Model comparison

Kimi K2.5 Instant vs Muse Spark 1.1

Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 43.6 on the Noometry Index.

Last verified . 18 shared benchmarks.

Kimi K2.5 Instant Moonshot AI

43.6

Rank #89 Confirmed

Muse Spark 1.1 Meta

49.9

Rank #51 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Kimi K2.5 Instant scores higher in 0 categories and Muse Spark 1.1 in 9 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Muse Spark 1.1 leads 47.1 to 29.7.
  • Kimi K2.5 Instant has downloadable open weights; the other is API-only.

Side by side

Kimi K2.5 InstantMuse Spark 1.1
ProviderMoonshot AIMeta
Noometry Index43.649.9
Released—2026-04-08
WeightsOpenProprietary
Context window—1.05M
Max output—131K
Input $ / M tokens—$1.25
Output $ / M tokens—$4.25
Results tracked1837

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

Category by category

Coding Muse Spark 1.1 leads

Kimi K2.5 Instant: 42.6 (#97), Muse Spark 1.1: 51.3 (#40)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena WebDev14041542
LMArena Coding14841498
DeepSWE—53.3%
SciCode—58.8%

Agentic & Tool Use Not comparable

Kimi K2.5 Instant: —, Muse Spark 1.1: 30.8 (#73)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
APEX-Agents—31.8%
τ²-bench Banking—40.5%
GBAEval—7.9%
GDP.pdf—15%
Vending-Bench 2—6,520

Reasoning Muse Spark 1.1 leads

Kimi K2.5 Instant: 29.7 (#90), Muse Spark 1.1: 47.1 (#44)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena Hard Prompts14431486
NYT Connections (extended)—84.9%
CritPt—15.1%
DTBench—94.4%
LMCA—49.9%
Surface Evolver Bench—52.5%
Epoch Capabilities Index—154.21

Math Muse Spark 1.1 leads

Kimi K2.5 Instant: 39.4 (#105), Muse Spark 1.1: 45.5 (#76)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena Math14421483
ProofBench—39%

Knowledge Muse Spark 1.1 leads

Kimi K2.5 Instant: 40.2 (#123), Muse Spark 1.1: 53.1 (#59)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena Expert14401478
SimpleQA Verified—57.8%

Multimodal Muse Spark 1.1 leads

Kimi K2.5 Instant: 40.2 (#50), Muse Spark 1.1: 42.6 (#29)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena Vision12541293
LMArena Document—1465

Multilingual Muse Spark 1.1 leads

Kimi K2.5 Instant: 52.0 (#94), Muse Spark 1.1: 56.7 (#17)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena Non-English14061472
LMArena Chinese14491518
LMArena French14031494
LMArena German14131466
LMArena Korean13781458
LMArena Russian14041483
LMArena Spanish14471464
LMArena Japanese—1451

Instruction Following Muse Spark 1.1 leads

Kimi K2.5 Instant: 75.3 (#65), Muse Spark 1.1: 76.5 (#39)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena Instruction Following14301457

Long Context Too close to call

Kimi K2.5 Instant: 43.9 (#83), Muse Spark 1.1: 44.8 (#58)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena Longer Query14351462

Writing & Preference Muse Spark 1.1 leads

Kimi K2.5 Instant: 60.6 (#95), Muse Spark 1.1: 73.4 (#11)

BenchmarkKimi K2.5 InstantMuse Spark 1.1
LMArena Text14201479
LMArena Creative Writing13811437
LMArena Multi-Turn14271485
EQ-Bench Creative Writing—1927
EQ-Bench 4—1260

Frequently asked questions

Is Kimi K2.5 Instant better than Muse Spark 1.1?

Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 43.6 on the Noometry Index.

Is Kimi K2.5 Instant or Muse Spark 1.1 better for coding?

Muse Spark 1.1 scores higher on coding benchmarks: 51.3 versus 42.6 in the Noometry coding category.

How many benchmarks do Kimi K2.5 Instant and Muse Spark 1.1 share?

18 benchmarks have published results for both models. Kimi K2.5 Instant has 18 scored results on Noometry and Muse Spark 1.1 has 37.

Related comparisons

Go deeper