Noometry

Model comparison

DeepSeek V4.1 Flash vs Mistral Small 3

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 31.2 on the Noometry Index. Mistral Small 3 costs 4.6× less per token, which makes it the better buy when DeepSeek V4.1 Flash's lead doesn't matter for your workload.

Last verified . 20 shared benchmarks.

DeepSeek V4.1 Flash DeepSeek

52.8

Rank #38 Confirmed

Mistral Small 3 Mistral AI

31.2

Rank #278 Confirmed

Summary

  • They share 20 benchmarks with published results for both. DeepSeek V4.1 Flash scores higher in 8 categories and Mistral Small 3 in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where DeepSeek V4.1 Flash leads 66.7 to 16.3.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 98.3% for DeepSeek V4.1 Flash and 6.7% for Mistral Small 3.
  • Mistral Small 3 is cheaper at $0.05 / $0.08 per million input/output tokens, against $0.15 / $0.60 for DeepSeek V4.1 Flash.
  • DeepSeek V4.1 Flash accepts more context: 1M tokens versus 33K.

Side by side

DeepSeek V4.1 FlashMistral Small 3
ProviderDeepSeekMistral AI
Noometry Index52.831.2
Released2026-09-092025-01-30
WeightsOpenOpen
Context window1M33K
Max output393K16K
Input $ / M tokens$0.15$0.05
Output $ / M tokens$0.60$0.08
Results tracked3724

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Category by category

Coding DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 52.9 (#32), Mistral Small 3: 36.5 (#207)

BenchmarkDeepSeek V4.1 FlashMistral Small 3
LMArena Coding15061246
LMArena WebDev1619—
SciCode51.9%—
BigCodeBench Instruct—45.3%
BigCodeBench Complete—50.4%
ALE-Bench1,092—

Agentic & Tool Use Not comparable

DeepSeek V4.1 Flash: 31.2 (#69), Mistral Small 3: —

BenchmarkDeepSeek V4.1 FlashMistral Small 3
APEX-Agents39.5%—
GDP.pdf19.8%—

Reasoning DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 50.2 (#36), Mistral Small 3: 18.9 (#273)

BenchmarkDeepSeek V4.1 FlashMistral Small 3
LMArena Hard Prompts14831233
Epoch Capabilities Index154.9127.07
NYT Connections (extended)89.6%—
CritPt14.3%—
Chess Puzzles—0%
Mystery Game Puzzles43%—
DTBench89.9%—
LMCA47%—
Surface Evolver Bench46.3%—

Math DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 66.7 (#25), Mistral Small 3: 16.3 (#295)

BenchmarkDeepSeek V4.1 FlashMistral Small 3
OTIS Mock AIME 2024-202598.3%6.7%
LMArena Math14771240
FrontierMath (Tiers 1-3)67.4%—
FrontierMath Tier 426.8%—
ProofBench54%—

Knowledge DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 57.9 (#38), Mistral Small 3: 25.1 (#263)

BenchmarkDeepSeek V4.1 FlashMistral Small 3
GPQA Diamond89.8%47.3%
LMArena Expert15061202
Confabulations—25.2%

Multimodal Not comparable

DeepSeek V4.1 Flash: 39.1 (#61), Mistral Small 3: —

BenchmarkDeepSeek V4.1 FlashMistral Small 3
LMArena Vision1277—
Furniture Assembly34.2%—

Multilingual DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 55.0 (#35), Mistral Small 3: 37.3 (#236)

BenchmarkDeepSeek V4.1 FlashMistral Small 3
LMArena Non-English14481198
LMArena Chinese14971204
LMArena French14521203
LMArena German14841211
LMArena Japanese14121111
LMArena Korean14521188
LMArena Russian14711216
LMArena Spanish1459—

Instruction Following DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 77.3 (#26), Mistral Small 3: 63.7 (#229)

BenchmarkDeepSeek V4.1 FlashMistral Small 3
LMArena Instruction Following14741214

Long Context DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 45.2 (#47), Mistral Small 3: 37.8 (#211)

BenchmarkDeepSeek V4.1 FlashMistral Small 3
LMArena Longer Query14751246

Writing & Preference DeepSeek V4.1 Flash leads

DeepSeek V4.1 Flash: 65.4 (#48), Mistral Small 3: 32.2 (#280)

BenchmarkDeepSeek V4.1 FlashMistral Small 3
LMArena Text14621234
LMArena Creative Writing14351195
EQ-Bench Creative Writing1540707
LMArena Multi-Turn14571217

Frequently asked questions

Is DeepSeek V4.1 Flash better than Mistral Small 3?

DeepSeek V4.1 Flash is the stronger model overall, scoring 52.8 to 31.2 on the Noometry Index. Mistral Small 3 costs 4.6× less per token, which makes it the better buy when DeepSeek V4.1 Flash's lead doesn't matter for your workload.

Which is cheaper, DeepSeek V4.1 Flash or Mistral Small 3?

Mistral Small 3 is cheaper. It lists at $0.05 per million input tokens and $0.08 per million output tokens; DeepSeek V4.1 Flash lists at $0.15 and $0.60.

Is DeepSeek V4.1 Flash or Mistral Small 3 better for coding?

DeepSeek V4.1 Flash scores higher on coding benchmarks: 52.9 versus 36.5 in the Noometry coding category.

Which has the bigger context window?

DeepSeek V4.1 Flash does, with 1M tokens against 33K.

How many benchmarks do DeepSeek V4.1 Flash and Mistral Small 3 share?

20 benchmarks have published results for both models. DeepSeek V4.1 Flash has 37 scored results on Noometry and Mistral Small 3 has 24.

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