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DeepSeek V4 Flash 0423 vs o1

DeepSeek V4 Flash 0423 leads o1 on the Artificial Analysis Intelligence Index, 24.4 to 15.2, and DeepSeek V4 Flash 0423 costs 214.3x less per output token ($0.28 vs $60.00 per million). Updated October 22, 2026; 34 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0423 Replace o1
DeepSeek V4 Flash 0423DeepSeek
Coding
No data
Overall
No data
Output $/M
$0.28
32
o1OpenAI
Coding
No data
Overall
44.6
Output $/M
$60.00
2
vs boards won of 34 shared

DeepSeek V4 Flash 0423 or o1: 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 214.3x cheaper ($0.28 vs $60.00 per million) and a larger context window (1.05M against 200K tokens).

Model ADeepSeek V4 Flash 0423DeepSeekNot benchmarked1 independent benchmarkNo cost per solved taskModel Bo1OpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
34
DeepSeek V4 Flash 0423 only
15
o1 only
35
Like-for-like categories
6 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, o1 not benchmarked.
Widest category
Knowledge, 14.1 points apart on average over 4 shared benchmarks.
Widest single gap
LMArena Text: business and finance: DeepSeek V4 Flash 0423 1425 against o1 1328, 16.3 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0423 $0.28 against o1 $60.00 per million output tokens, 214.3x apart.
Context window
DeepSeek V4 Flash 0423 takes 1.05M tokens, o1 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 0423Barso1Ties
Coding31
Intelligence20
Reasoning40
Math20
Knowledge40
General171
All shared boards322
CodingLike-for-likeSix of these boards feed the Vibe Coding Index31
Coding benchmarks for DeepSeek V4 Flash 0423 and o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
Aider polyglotNot measured61.7%Only o1 measured
LMArena WebDev1582Not measuredOnly DeepSeek V4 Flash 0423 measured
AA Coding Index52.039.7DeepSeek V4 Flash 0423
LiveCodeBench (Vals AI)Not measured50.3%Only o1 measured
LiveCodeBench (Artificial Analysis run)Not measured67.9%Only o1 measured
Terminal-Bench Hard (Artificial Analysis run)Not measured12.9%Only o1 measured
WeirdML45.6%46.1%o1
ALE-Bench678.2Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: coding14571367DeepSeek V4 Flash 0423
LMArena Text: software and IT14531366DeepSeek V4 Flash 0423
LMArena WebDev: React1585Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena WebDev: HTML1558Not measuredOnly DeepSeek V4 Flash 0423 measured
SciCodeNot measured4.6%Only o1 measured
Neither model has a result on the other 26 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for DeepSeek V4 Flash 0423 and o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
AA Intelligence Index24.415.2DeepSeek V4 Flash 0423
Epoch Capabilities Index146.1141.7DeepSeek V4 Flash 0423
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index3 boards, none shared
Agentic work benchmarks for DeepSeek V4 Flash 0423 and o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
AA Agentic Index26.3Not measuredOnly DeepSeek V4 Flash 0423 measured
τ²-Bench TelecomNot measured62.6%Only o1 measured
METR time horizonsNot measured51.1%Only o1 measured
Neither model has a result on the other 38 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index40
Reasoning benchmarks for DeepSeek V4 Flash 0423 and o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
GPQA DiamondNot measured73.2%Only o1 measured
MMMU Pro (Vals AI)Not measured77.4%Only o1 measured
GPQA Diamond (Artificial Analysis run)Not measured74.7%Only o1 measured
Humanity's Last Exam (Artificial Analysis run)Not measured7.0%Only o1 measured
GPQA Diamond (Epoch AI run)Not measured76.8%Only o1 measured
ARC-AGINot measured30.7%Only o1 measured
SimpleBench46.3%40.1%DeepSeek V4 Flash 0423
Chess puzzlesNot measured10.0%Only o1 measured
VPCTNot measured37.0%Only o1 measured
LMArena Text: hard prompts14441371DeepSeek V4 Flash 0423
LMArena Text: expert14411361DeepSeek V4 Flash 0423
LMArena Text: hard prompts in English14491372DeepSeek V4 Flash 0423
Kagi LLM Benchmark52.2%Not measuredOnly DeepSeek V4 Flash 0423 measured
Neither model has a result on the other 9 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for DeepSeek V4 Flash 0423 and o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
AIMENot measured71.5%Only o1 measured
MATH 500 (Vals AI)Not measured90.4%Only o1 measured
MGSM (Vals AI)Not measured89.3%Only o1 measured
OTIS Mock AIMENot measured73.3%Only o1 measured
FrontierMath, tiers 1 to 3Not measured14.7%Only o1 measured
MATH level 5Not measured94.7%Only o1 measured
LMArena Text: math14261388DeepSeek V4 Flash 0423
LMArena Text: mathematical work14321390DeepSeek V4 Flash 0423
Neither model has a result on the other 5 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for DeepSeek V4 Flash 0423 and o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
MMLU ProNot measured83.5%Only o1 measured
LegalBench (Vals AI)Not measured80.4%Only o1 measured
TaxEval (Vals AI)Not measured74.3%Only o1 measured
MedQA (Vals AI)Not measured96.5%Only o1 measured
MMLU Pro (Artificial Analysis run)Not measured84.1%Only o1 measured
SimpleQA VerifiedNot measured41.1%Only o1 measured
GeoBenchNot measured80.0%Only o1 measured
LMArena Text: science14461369DeepSeek V4 Flash 0423
LMArena Text: medicine and healthcare14481355DeepSeek V4 Flash 0423
LMArena Text: legal and government14391368DeepSeek V4 Flash 0423
LMArena Text: business and finance14251328DeepSeek V4 Flash 0423
Neither model has a result on the other 7 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for DeepSeek V4 Flash 0423 and o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
Design Arena: websites1207Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: UI components1162Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: game dev1196Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: data viz1127Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: 3D1188Not measuredOnly DeepSeek V4 Flash 0423 measured
Design Arena: all code categories1205Not measuredOnly DeepSeek V4 Flash 0423 measured
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 index171
General benchmarks for DeepSeek V4 Flash 0423 and o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
IFBenchNot measured70.3%Only o1 measured
Long context reasoning (AA-LCR)Not measured65.0%Only o1 measured
DTBench86.4%74.7%DeepSeek V4 Flash 0423
LMCA35.9%22.3%DeepSeek V4 Flash 0423
Fiction.LiveBenchNot measured83.3%Only o1 measured
Creative writing (Lech Mazur)Not measured70.2%Only o1 measured
LMArena Text14321366DeepSeek V4 Flash 0423
LMArena Text: instruction following14211367DeepSeek V4 Flash 0423
LMArena Text: creative writing14031347DeepSeek V4 Flash 0423
LMArena VisionNot measured1168Only o1 measured
LMArena Text: English14411372DeepSeek V4 Flash 0423
LMArena Text: non-English14191358DeepSeek V4 Flash 0423
LMArena Text: Chinese14631394DeepSeek V4 Flash 0423
LMArena Text: German14191337DeepSeek V4 Flash 0423
LMArena Text: Japanese13891346DeepSeek V4 Flash 0423
LMArena Text: Korean13831396o1
LMArena Text: French14391344DeepSeek V4 Flash 0423
LMArena Text: Spanish14361345DeepSeek V4 Flash 0423
LMArena Text: Russian14271356DeepSeek V4 Flash 0423
LMArena Text: Polish1436Not measuredOnly DeepSeek V4 Flash 0423 measured
LMArena Text: multi-turn14491355DeepSeek V4 Flash 0423
LMArena Text: longer queries14341378DeepSeek V4 Flash 0423
LMArena Text: writing and language14101360DeepSeek V4 Flash 0423
LMArena Text: entertainment and media14001358DeepSeek V4 Flash 0423
LMArena Vision: EnglishNot measured1162Only o1 measured
LMArena Vision: ChineseNot measured1235Only o1 measured
Neither model has a result on the other 20 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 o1
BenchmarkDeepSeek V4 Flash 0423o1Leader
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
o1$0.045Fits 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
o1$0.930Fits 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
o1$3.60Exceeds 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 o1
SpecificationDeepSeek V4 Flash 0423OpenAI o1
MakerDeepSeekOpenAI
WeightsOpen weightsNo public weights listed
ReleasedApril 24, 2026December 17, 2024
Context window1.05M200K
Input $/Mtok$0.14$15.00
Output $/Mtok$0.28$60.00
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 o1 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 214.3x cheaper ($0.28 vs $60.00 per million) and a larger context window (1.05M against 200K tokens).

Which is cheaper, DeepSeek V4 Flash 0423 or o1?

DeepSeek V4 Flash 0423 costs $0.14 per million input tokens and $0.28 per million output tokens; o1 costs $15.00 and $60.00. Cost per solved task is known for neither of them.

Which has the bigger context window, DeepSeek V4 Flash 0423 or o1?

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

How many benchmarks is the DeepSeek V4 Flash 0423 vs o1 comparison based on?

34 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 o1's on 0. Where only one model has a result, the page says so instead of naming a winner.

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