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DeepSeek V4 Flash 0423 vs o4 Mini

DeepSeek V4 Flash 0423 leads o4 Mini on the Artificial Analysis Intelligence Index, 24.4 to 16.7, and DeepSeek V4 Flash 0423 costs 15.7x less per output token ($0.28 vs $4.40 per million). Updated October 22, 2026; 41 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0423 Replace o4 Mini
DeepSeek V4 Flash 0423DeepSeek
Coding
No data
Overall
No data
Output $/M
$0.28
39
o4 MiniOpenAI
Coding
No data
Overall
43.0
Output $/M
$4.40
2
vs boards won of 41 shared

DeepSeek V4 Flash 0423 or o4 Mini: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick DeepSeek V4 Flash 0423 for output tokens 15.7x cheaper ($0.28 vs $4.40 per million) and a larger context window (1.05M against 200K tokens).

Model ADeepSeek V4 Flash 0423DeepSeekNot benchmarked1 independent benchmarkNo cost per solved taskModel Bo4 MiniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
41
DeepSeek V4 Flash 0423 only
8
o4 Mini only
57
Like-for-like categories
7 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
DeepSeek V4 Flash 0423 not benchmarked, o4 Mini not benchmarked.
Widest category
Web design, 26.9 points apart on average over 6 shared benchmarks.
Widest single gap
Design Arena: 3D: DeepSeek V4 Flash 0423 1188 against o4 Mini 854, 41.8 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0423 $0.28 against o4 Mini $4.40 per million output tokens, 15.7x apart.
Context window
DeepSeek V4 Flash 0423 takes 1.05M tokens, o4 Mini 200K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryDeepSeek V4 Flash 0423Barso4 MiniTies
Coding21
Intelligence20
Reasoning41
Math20
Knowledge40
Web design60
General190
All shared boards392
CodingLike-for-likeSix of these boards feed the Vibe Coding Index21
Coding benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
Aider polyglotNot measured72.0%Only o4 Mini measured
SWE-bench VerifiedNot measured64.6%Only o4 Mini measured
SWE-bench MultimodalNot measured33.9%Only o4 Mini measured
LMArena WebDev1582Not measuredOnly DeepSeek V4 Flash 0423 measured
AA Coding Index52.0Not measuredOnly DeepSeek V4 Flash 0423 measured
LiveCodeBench (Vals AI)Not measured82.2%Only o4 Mini measured
LiveCodeBench (Artificial Analysis run)Not measured85.9%Only o4 Mini measured
Terminal-Bench Hard (Artificial Analysis run)Not measured15.2%Only o4 Mini measured
GSO-BenchNot measured3.6%Only o4 Mini measured
WeirdML45.6%52.6%o4 Mini
ALE-Bench678.2Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: coding14571368DeepSeek V4 Flash 0423
LMArena Text: software and IT14531367DeepSeek V4 Flash 0423
LMArena WebDev: React1585Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena WebDev: HTML1558Not measuredOnly DeepSeek V4 Flash 0423 measured
SciCodeNot measured10.8%Only o4 Mini measured
Neither model has a result on the other 23 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
AA Intelligence Index24.416.7DeepSeek V4 Flash 0423
Epoch Capabilities Index146.1145.5DeepSeek V4 Flash 0423
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
Agentic work benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
AA Agentic Index26.3Not measuredOnly DeepSeek V4 Flash 0423 measured
τ²-Bench TelecomNot measured55.6%Only o4 Mini measured
METR time horizonsNot measured63.9%Only o4 Mini measured
Berkeley Function Calling Leaderboard (BFCL)Not measured53.2%Only o4 Mini measured
Neither model has a result on the other 37 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index41
Reasoning benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
GPQA DiamondNot measured74.5%Only o4 Mini measured
MMMU Pro (Vals AI)Not measured79.7%Only o4 Mini measured
GPQA Diamond (Artificial Analysis run)Not measured78.4%Only o4 Mini measured
Humanity's Last Exam (Artificial Analysis run)Not measured16.5%Only o4 Mini measured
GPQA Diamond (Epoch AI run)Not measured79.6%Only o4 Mini measured
ARC-AGINot measured58.7%Only o4 Mini measured
ARC-AGI-2Not measured6.1%Only o4 Mini measured
SimpleBench46.3%38.7%DeepSeek V4 Flash 0423
Chess puzzlesNot measured22.0%Only o4 Mini measured
Mystery game puzzlesNot measured5.0%Only o4 Mini measured
VPCTNot measured57.5%Only o4 Mini measured
LMArena Text: hard prompts14441351DeepSeek V4 Flash 0423
LMArena Text: expert14411343DeepSeek V4 Flash 0423
LMArena Text: hard prompts in English14491366DeepSeek V4 Flash 0423
LMArena Vision: diagramsNot measured1197Only o4 Mini measured
LMArena Vision: homeworkNot measured1234Only o4 Mini measured
Kagi LLM Benchmark52.2%67.6%o4 Mini
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
AIMENot measured83.7%Only o4 Mini measured
MATH 500 (Vals AI)Not measured94.2%Only o4 Mini measured
MGSM (Vals AI)Not measured93.4%Only o4 Mini measured
AA Math IndexNot measured90.7Only o4 Mini measured
AIME 2025 (Artificial Analysis run)Not measured90.7%Only o4 Mini measured
OTIS Mock AIMENot measured81.7%Only o4 Mini measured
FrontierMath, tiers 1 to 3Not measured36.1%Only o4 Mini measured
FrontierMath, tier 4Not measured4.9%Only o4 Mini measured
MATH level 5Not measured97.8%Only o4 Mini measured
LMArena Text: math14261389DeepSeek V4 Flash 0423
LMArena Text: mathematical work14321379DeepSeek V4 Flash 0423
Neither model has a result on the other 2 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
MMLU ProNot measured80.6%Only o4 Mini measured
LegalBench (Vals AI)Not measured79.2%Only o4 Mini measured
CorpFin (Vals AI)Not measured59.0%Only o4 Mini measured
TaxEval (Vals AI)Not measured74.8%Only o4 Mini measured
MortgageTax (Vals AI)Not measured64.8%Only o4 Mini measured
MedQA (Vals AI)Not measured96.0%Only o4 Mini measured
MedCode (Vals AI)Not measured33.8%Only o4 Mini measured
MMLU Pro (Artificial Analysis run)Not measured83.2%Only o4 Mini measured
SimpleQA VerifiedNot measured19.6%Only o4 Mini measured
GeoBenchNot measured64.0%Only o4 Mini measured
LMArena Text: science14461354DeepSeek V4 Flash 0423
LMArena Text: medicine and healthcare14481361DeepSeek V4 Flash 0423
LMArena Text: legal and government14391350DeepSeek V4 Flash 0423
LMArena Text: business and finance14251325DeepSeek V4 Flash 0423
FACTS Benchmark SuiteNot measured28.1%Only o4 Mini measured
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
Design Arena: websites1207985DeepSeek V4 Flash 0423
Design Arena: UI components1162983DeepSeek V4 Flash 0423
Design Arena: game dev11961003DeepSeek V4 Flash 0423
Design Arena: data viz1127991DeepSeek V4 Flash 0423
Design Arena: 3D1188854DeepSeek V4 Flash 0423
Design Arena: all code categories1205976DeepSeek V4 Flash 0423
Design Arena: SVG1155Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: ASCII art1109Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index190
General benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
SAGE (Vals AI)Not measured41.1%Only o4 Mini measured
MedScribe (Vals AI)Not measured69.1%Only o4 Mini measured
IFBenchNot measured68.7%Only o4 Mini measured
Long context reasoning (AA-LCR)Not measured61.0%Only o4 Mini measured
DTBench86.4%77.6%DeepSeek V4 Flash 0423
LMCA35.9%26.5%DeepSeek V4 Flash 0423
Fiction.LiveBenchNot measured77.8%Only o4 Mini measured
Creative writing (Lech Mazur)Not measured75.0%Only o4 Mini measured
LMArena Text14321353DeepSeek V4 Flash 0423
LMArena Text: instruction following14211320DeepSeek V4 Flash 0423
LMArena Text: creative writing14031294DeepSeek V4 Flash 0423
LMArena VisionNot measured1194Only o4 Mini measured
LMArena Text: English14411367DeepSeek V4 Flash 0423
LMArena Text: non-English14191337DeepSeek V4 Flash 0423
LMArena Text: Chinese14631354DeepSeek V4 Flash 0423
LMArena Text: German14191336DeepSeek V4 Flash 0423
LMArena Text: Japanese13891308DeepSeek V4 Flash 0423
LMArena Text: Korean13831312DeepSeek V4 Flash 0423
LMArena Text: French14391364DeepSeek V4 Flash 0423
LMArena Text: Spanish14361346DeepSeek V4 Flash 0423
LMArena Text: Russian14271334DeepSeek V4 Flash 0423
LMArena Text: Polish14361358DeepSeek V4 Flash 0423
LMArena Text: multi-turn14491350DeepSeek V4 Flash 0423
LMArena Text: longer queries14341315DeepSeek V4 Flash 0423
LMArena Text: writing and language14101316DeepSeek V4 Flash 0423
LMArena Text: entertainment and media14001308DeepSeek V4 Flash 0423
LMArena Vision: EnglishNot measured1200Only o4 Mini measured
LMArena Vision: ChineseNot measured1218Only o4 Mini measured
LMArena Vision: reading textNot measured1197Only o4 Mini measured
LMArena Vision: humorNot measured1199Only o4 Mini measured
LMArena Vision: captioningNot measured1204Only o4 Mini measured
LMArena Vision: recognizing thingsNot measured1218Only o4 Mini measured
LMArena Vision: creative writingNot measured1166Only o4 Mini measured
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for DeepSeek V4 Flash 0423 and o4 Mini
BenchmarkDeepSeek V4 Flash 0423o4 MiniLeader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

DeepSeek V4 Flash 0423$0.0003Fits in one request
o4 Mini$0.0033Fits in one request

DeepSeek V4 Flash 0423 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0423$0.0078Fits in one request
o4 Mini$0.068Fits in one request

DeepSeek V4 Flash 0423 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0423$0.031Fits in one request
o4 Mini$0.264Exceeds the context window

DeepSeek V4 Flash 0423 costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of DeepSeek V4 Flash 0423 and o4 Mini
SpecificationDeepSeek V4 Flash 0423OpenAI o4 Mini
MakerDeepSeekOpenAI
WeightsOpen weightsNo public weights listed
ReleasedApril 24, 2026April 16, 2025
Context window1.05M200K
Input $/Mtok$0.14$1.10
Output $/Mtok$0.28$4.40
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it10
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0423 better than o4 Mini for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick DeepSeek V4 Flash 0423 for output tokens 15.7x cheaper ($0.28 vs $4.40 per million) and a larger context window (1.05M against 200K tokens).

Which is cheaper, DeepSeek V4 Flash 0423 or o4 Mini?

DeepSeek V4 Flash 0423 costs $0.14 per million input tokens and $0.28 per million output tokens; o4 Mini costs $1.10 and $4.40. Cost per solved task is known for neither of them.

Which has the bigger context window, DeepSeek V4 Flash 0423 or o4 Mini?

DeepSeek V4 Flash 0423, with 1.05M tokens against 200K.

How many benchmarks is the DeepSeek V4 Flash 0423 vs o4 Mini comparison based on?

41 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4 Flash 0423's coding index rests on 1 independent benchmark and o4 Mini's on 0. Where only one model has a result, the page says so instead of naming a winner.

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