Noometry

Model comparison

Kimi K3 vs Qwen3.8 Flash

Kimi K3 has enough public results to be ranked (#15); Qwen3.8 Flash does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Kimi K3 Moonshot AI

59.5

Rank #15 Confirmed

Qwen3.8 Flash Alibaba (Qwen)

35.5

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Kimi K3 scores higher in 1 category and Qwen3.8 Flash in 0 categories; one gap is clear of the uncertainty.
  • The widest gap is in agentic & tool use, where Kimi K3 leads 41.8 to 31.3.
  • Qwen3.8 Flash is cheaper at $0.15 / $0.47 per million input/output tokens, against $3 / $15 for Kimi K3.
  • Kimi K3 accepts more context: 1.05M tokens versus 1M.
  • Kimi K3 has downloadable open weights; the other is API-only.

Side by side

Kimi K3Qwen3.8 Flash
ProviderMoonshot AIAlibaba (Qwen)
Noometry Index59.535.5
Released2026-07-162026-08-26
WeightsOpenProprietary
Context window1.05M1M
Max output1.05M131K
Input $ / M tokens$3$0.15
Output $ / M tokens$15$0.47
Results tracked531

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Category by category

Coding Not comparable

Kimi K3: 61.0 (#10), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
DeepSWE68.5%—
FrontierCode44.2%—
LMArena WebDev1654—
FrontierSWE25.9%—
SciCode59.5%—
WeirdML82.6%—
LMArena Coding1508—
ALE-Bench1,524—

Agentic & Tool Use Kimi K3 leads

Kimi K3: 41.8 (#20), Qwen3.8 Flash: 31.3

BenchmarkKimi K3Qwen3.8 Flash
GDP.pdf19%16.6%
APEX-Agents50.6%—
τ²-bench Banking37.1%—
PostTrainBench32%—
GBAEval48.3%—
Vending-Bench 25,165—

Reasoning Not comparable

Kimi K3: 63.0 (#17), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
ARC-AGI-260.4%—
SimpleBench60.7%—
NYT Connections (extended)93.6%—
ARC-AGI-194.5%—
CritPt23.4%—
Chess Puzzles39%—
LMArena Hard Prompts1496—
Mystery Game Puzzles26%—
DTBench91.2%—
LMCA52.7%—
Surface Evolver Bench95%—
Epoch Capabilities Index157.45—
ForecastBench61.1—

Math Not comparable

Kimi K3: 74.2 (#16), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
FrontierMath (Tiers 1-3)72.2%—
FrontierMath Tier 439%—
MathArena Final-Answer Competitions87.8%—
OTIS Mock AIME 2024-202597.2%—
ProofBench87%—
LMArena Math1491—

Knowledge Not comparable

Kimi K3: 63.2 (#21), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
GPQA Diamond93.1%—
SimpleQA Verified50.6%—
LMArena Expert1521—

Multimodal Not comparable

Kimi K3: 37.8 (#70), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
Blueprint-Bench 229.5%—
Furniture Assembly34.2%—

Multilingual Not comparable

Kimi K3: 56.3 (#21), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
LMArena Non-English1466—
LMArena Chinese1529—
LMArena French1491—
LMArena German1488—
LMArena Japanese1487—
LMArena Korean1458—
LMArena Russian1482—
LMArena Spanish1472—

Instruction Following Not comparable

Kimi K3: 77.7 (#14), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
LMArena Instruction Following1483—

Long Context Not comparable

Kimi K3: 45.8 (#29), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
LMArena Longer Query1494—

Writing & Preference Not comparable

Kimi K3: 76.6 (#4), Qwen3.8 Flash: —

BenchmarkKimi K3Qwen3.8 Flash
LMArena Text1476—
LMArena Creative Writing1454—
EQ-Bench Creative Writing2082—
EQ-Bench 41339—
LMArena Multi-Turn1488—

Frequently asked questions

Is Kimi K3 better than Qwen3.8 Flash?

Kimi K3 has enough public results to be ranked (#15); Qwen3.8 Flash does not yet, so treat this comparison as directional.

Which is cheaper, Kimi K3 or Qwen3.8 Flash?

Qwen3.8 Flash is cheaper. It lists at $0.15 per million input tokens and $0.47 per million output tokens; Kimi K3 lists at $3 and $15.

Which has the bigger context window?

Kimi K3 does, with 1.05M tokens against 1M.

How many benchmarks do Kimi K3 and Qwen3.8 Flash share?

1 benchmark has published results for both models. Kimi K3 has 53 scored results on Noometry and Qwen3.8 Flash has 1.

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