Noometry

Model comparison

C4ai Aya Expanse 8b vs Muse Spark 1.3

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 34.9 on the Noometry Index.

Last verified . 14 shared benchmarks.

C4ai Aya Expanse 8b Cohere

34.9

Rank #229 Confirmed

Muse Spark 1.3 Meta

54.8

Rank #27 Confirmed

Summary

  • They share 14 benchmarks with published results for both. C4ai Aya Expanse 8b scores higher in 0 categories and Muse Spark 1.3 in 8 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Muse Spark 1.3 leads 73.1 to 33.3.
  • C4ai Aya Expanse 8b has downloadable open weights; the other is API-only.

Side by side

C4ai Aya Expanse 8bMuse Spark 1.3
ProviderCohereMeta
Noometry Index34.954.8
Released—2026-09-02
WeightsOpenProprietary
Context window—1.05M
Max output—131K
Input $ / M tokens—$1.25
Output $ / M tokens—$4.25
Results tracked1537

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

Category by category

Coding Muse Spark 1.3 leads

C4ai Aya Expanse 8b: 33.8 (#252), Muse Spark 1.3: 56.6 (#21)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Coding11601514
CursorBench—41.6%
LMArena WebDev—1657
SciCode—59.7%

Agentic & Tool Use Not comparable

C4ai Aya Expanse 8b: —, Muse Spark 1.3: 38.6 (#30)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
APEX-Agents—57.8%
GDP.pdf—27.6%

Reasoning Muse Spark 1.3 leads

C4ai Aya Expanse 8b: 22.4 (#197), Muse Spark 1.3: 54.0 (#27)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Hard Prompts11561503
NYT Connections (extended)—85.1%
CritPt—26%
Chess Puzzles—38%
Mystery Game Puzzles—25%
DTBench—96.5%
LMCA—53.9%
Bench to the Future 3—0.14
Epoch Capabilities Index—156.75

Math Muse Spark 1.3 leads

C4ai Aya Expanse 8b: 33.3 (#203), Muse Spark 1.3: 73.1 (#21)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Math11681494
FrontierMath (Tiers 1-3)—74.4%
FrontierMath Tier 4—46.3%
OTIS Mock AIME 2024-2025—99.2%
ProofBench—58%

Knowledge Muse Spark 1.3 leads

C4ai Aya Expanse 8b: 33.6 (#201), Muse Spark 1.3: 42.6 (#95)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Expert11531516
Vectara Hallucination Rate9.5%—

Multimodal Not comparable

C4ai Aya Expanse 8b: —, Muse Spark 1.3: 43.7 (#22)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Vision—1309
LMArena Document—1471

Multilingual Muse Spark 1.3 leads

C4ai Aya Expanse 8b: 36.1 (#242), Muse Spark 1.3: 57.4 (#8)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Non-English11801481
LMArena Chinese11811529
LMArena German11881515
LMArena Japanese11201474
LMArena Russian11971490
LMArena French—1524
LMArena Korean—1501
LMArena Spanish—1490

Instruction Following Muse Spark 1.3 leads

C4ai Aya Expanse 8b: 60.1 (#253), Muse Spark 1.3: 77.5 (#22)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Instruction Following11551477

Long Context Muse Spark 1.3 leads

C4ai Aya Expanse 8b: 36.1 (#236), Muse Spark 1.3: 45.6 (#32)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Longer Query11911488

Writing & Preference Muse Spark 1.3 leads

C4ai Aya Expanse 8b: 39.0 (#250), Muse Spark 1.3: 73.6 (#9)

BenchmarkC4ai Aya Expanse 8bMuse Spark 1.3
LMArena Text11851490
LMArena Creative Writing11681455
LMArena Multi-Turn11601482
EQ-Bench Creative Writing—1906

Frequently asked questions

Is C4ai Aya Expanse 8b better than Muse Spark 1.3?

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 34.9 on the Noometry Index.

Is C4ai Aya Expanse 8b or Muse Spark 1.3 better for coding?

Muse Spark 1.3 scores higher on coding benchmarks: 56.6 versus 33.8 in the Noometry coding category.

How many benchmarks do C4ai Aya Expanse 8b and Muse Spark 1.3 share?

14 benchmarks have published results for both models. C4ai Aya Expanse 8b has 15 scored results on Noometry and Muse Spark 1.3 has 37.

Related comparisons

Go deeper