Noometry

Model comparison

DeepSeek V4 Flash vs GPT-5.4 mini

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 45.0 on the Noometry Index.

Last verified . 39 shared benchmarks.

DeepSeek V4 Flash DeepSeek

53.6

Rank #35 Confirmed

GPT-5.4 mini OpenAI

45.0

Rank #76 Confirmed

Summary

  • They share 39 benchmarks with published results for both. DeepSeek V4 Flash scores higher in 7 categories and GPT-5.4 mini in 1 category; 5 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where DeepSeek V4 Flash leads 53.7 to 30.4.
  • The biggest single-benchmark swing is ARC-AGI-2: 61.4% for DeepSeek V4 Flash and 18.9% for GPT-5.4 mini.
  • DeepSeek V4 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.75 / $4.50 for GPT-5.4 mini.
  • DeepSeek V4 Flash accepts more context: 1M tokens versus 400K.
  • DeepSeek V4 Flash has downloadable open weights; the other is API-only.

Side by side

DeepSeek V4 FlashGPT-5.4 mini
ProviderDeepSeekOpenAI
Noometry Index53.645.0
Released2026-04-242026-03-17
WeightsOpenProprietary
Context window1M400K
Max output393K128K
Input $ / M tokens$0.15$0.75
Output $ / M tokens$0.60$4.50
Results tracked4146

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Category by category

Coding DeepSeek V4 Flash leads

DeepSeek V4 Flash: 47.9 (#59), GPT-5.4 mini: 45.2 (#72)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
FrontierCode18.8%27%
LMArena WebDev15821397
SciCode49.9%49.9%
WeirdML63%60.3%
LMArena Coding14571438
ALE-Bench1,3061,189

Agentic & Tool Use Not comparable

DeepSeek V4 Flash: —, GPT-5.4 mini: 29.9 (#81)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
DeepResearch Bench—36.3%

Reasoning DeepSeek V4 Flash leads

DeepSeek V4 Flash: 53.7 (#30), GPT-5.4 mini: 30.4 (#85)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
ARC-AGI-261.4%18.9%
Kagi LLM Benchmark52.2%37.9%
NYT Connections (extended)89.6%61.8%
ARC-AGI-189%63.7%
CritPt16.6%10%
Chess Puzzles33%24%
LMArena Hard Prompts14441424
Mystery Game Puzzles34%11%
DTBench90.9%80%
LMCA41.7%40.8%
Epoch Capabilities Index154.49148.84
SimpleBench61.1%—
Thematic Generalization—61.7%
ForecastBench—57

Math DeepSeek V4 Flash leads

DeepSeek V4 Flash: 60.3 (#37), GPT-5.4 mini: 45.5 (#75)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
FrontierMath (Tiers 1-3)57.5%51.2%
FrontierMath Tier 424.4%9.8%
OTIS Mock AIME 2024-202594.4%88.9%
ProofBench56%21%
LMArena Math14271419
MathArena Final-Answer Competitions76.5%—
FrontierMath (Feb 2025 set)—28.3%
FrontierMath Tier 4 (v1)—2.1%

Knowledge DeepSeek V4 Flash leads

DeepSeek V4 Flash: 55.4 (#48), GPT-5.4 mini: 51.5 (#67)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
GPQA Diamond91%86.9%
SimpleQA Verified33.6%29.4%
LMArena Expert14411435
Vectara Hallucination Rate—5.5%

Multimodal Not comparable

DeepSeek V4 Flash: —, GPT-5.4 mini: 39.7 (#56)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
LMArena Vision—1245

Multilingual DeepSeek V4 Flash leads

DeepSeek V4 Flash: 53.0 (#72), GPT-5.4 mini: 51.9 (#96)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
LMArena Non-English14201405
LMArena Chinese14681446
LMArena French14391440
LMArena German14181409
LMArena Japanese14061374
LMArena Korean13841368
LMArena Russian14281417
LMArena Spanish14361405

Instruction Following Too close to call

DeepSeek V4 Flash: 74.9 (#81), GPT-5.4 mini: 74.1 (#102)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
LMArena Instruction Following14211405

Long Context Too close to call

DeepSeek V4 Flash: 43.8 (#85), GPT-5.4 mini: 43.0 (#112)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
LMArena Longer Query14341407

Writing & Preference Too close to call

DeepSeek V4 Flash: 63.8 (#61), GPT-5.4 mini: 64.0 (#58)

BenchmarkDeepSeek V4 FlashGPT-5.4 mini
LMArena Text14321412
LMArena Creative Writing14031370
EQ-Bench Creative Writing15591665
LMArena Multi-Turn14491429

Frequently asked questions

Is DeepSeek V4 Flash better than GPT-5.4 mini?

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 45.0 on the Noometry Index.

Which is cheaper, DeepSeek V4 Flash or GPT-5.4 mini?

DeepSeek V4 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; GPT-5.4 mini lists at $0.75 and $4.50.

Is DeepSeek V4 Flash or GPT-5.4 mini better for coding?

DeepSeek V4 Flash scores higher on coding benchmarks: 47.9 versus 45.2 in the Noometry coding category.

Which has the bigger context window?

DeepSeek V4 Flash does, with 1M tokens against 400K.

How many benchmarks do DeepSeek V4 Flash and GPT-5.4 mini share?

39 benchmarks have published results for both models. DeepSeek V4 Flash has 41 scored results on Noometry and GPT-5.4 mini has 46.

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