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DeepSeek V4 Flash 0731 vs GPT-4o (2024-11-20)

DeepSeek V4 Flash 0731 leads GPT-4o (2024-11-20) on the Artificial Analysis Intelligence Index, 34.3 to 8.4, and DeepSeek V4 Flash 0731 costs 35.7x less per output token ($0.28 vs $10.00 per million). Updated October 22, 2026; 10 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0731 Replace GPT-4o (2024-11-20)
DeepSeek V4 Flash 0731DeepSeek
Coding
51.8
Overall
55.2
Output $/M
$0.28
8
GPT-4o (2024-11-20)OpenAI
Coding
No data
Overall
No data
Output $/M
$10.00
2
vs boards won of 10 shared

DeepSeek V4 Flash 0731 or GPT-4o (2024-11-20): which to pick

Only DeepSeek V4 Flash 0731 has a coding score, 51.8 on the Vibe Coding Index; GPT-4o (2024-11-20) has none, so the two cannot be ranked on coding.

Pick GPT-4o (2024-11-20) for work measured by LegalBench (Vals AI) or TaxEval (Vals AI), where it leads.

Model ADeepSeek V4 Flash 0731DeepSeek51.8/1004 independent benchmarks$0.01 per solved taskModel BGPT-4o (2024-11-20)OpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
10
DeepSeek V4 Flash 0731 only
45
GPT-4o (2024-11-20) only
14
Like-for-like categories
5 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 0731 51.8 from 4 benchmarks, GPT-4o (2024-11-20) not benchmarked.
Widest category
Math, 88.2 points apart on average over 1 shared benchmark.
Widest single gap
OTIS Mock AIME: DeepSeek V4 Flash 0731 94.4% against GPT-4o (2024-11-20) 6.3%, 88.2 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0731 $0.28 against GPT-4o (2024-11-20) $10.00 per million output tokens, 35.7x apart.
Context window
DeepSeek V4 Flash 0731 takes 1.05M tokens, GPT-4o (2024-11-20) 128K.

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 0731BarsGPT-4o (2024-11-20)Ties
Coding20
Intelligence10
Reasoning20
Math10
Knowledge22
All shared boards82
CodingLike-for-likeSix of these boards feed the Vibe Coding Index20
Coding benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
Aider polyglotNot measured18.2%Only GPT-4o (2024-11-20) measured
AA Coding Index69.1Not measuredOnly DeepSeek V4 Flash 0731 measured
LiveCodeBench (Vals AI)87.3%43.4%DeepSeek V4 Flash 0731
SWE-bench Verified (Vals AI)88.8%Not measuredOnly DeepSeek V4 Flash 0731 measured
Terminal-Bench 4 (Vals AI)18.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Vibe Code Bench (Vals AI)74.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Code migration (Vals AI)38.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
ProgramBench (Vals AI)0.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
IOI (Vals AI)32.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Terminal-Bench 2.1 (Vals AI)67.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
SkillsBench (Vals AI)50.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
CyberBench (Vals AI)72.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
SciCode50.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
FrontierCode18.8%Not measuredOnly DeepSeek V4 Flash 0731 measured
GSO-BenchNot measured0.0%Only GPT-4o (2024-11-20) measured
WeirdML63.0%25.1%DeepSeek V4 Flash 0731
CybenchNot measured12.5%Only GPT-4o (2024-11-20) measured
ALE-Bench1306.1Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 25 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
AA Intelligence Index34.38.4DeepSeek V4 Flash 0731
Epoch Capabilities Index154.8Not measuredOnly DeepSeek V4 Flash 0731 measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Agentic work benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
AA Agentic Index41.0Not measuredOnly DeepSeek V4 Flash 0731 measured
Finance Agent (Vals AI)49.5%Not measuredOnly DeepSeek V4 Flash 0731 measured
Tax Agent Bench (Vals AI)28.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
Legal Research Bench (Vals AI)30.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
Excel Modeling Benchmark (Vals AI)57.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
BioMysteryBench (Vals AI)64.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
Terminal-Bench-Science (Vals AI)4.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
TheAgentCompanyNot measured8.6%Only GPT-4o (2024-11-20) measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index20
Reasoning benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
GPQA Diamond89.9%53.8%DeepSeek V4 Flash 0731
MMMU Pro (Vals AI)Not measured62.2%Only GPT-4o (2024-11-20) measured
GPQA Diamond (Artificial Analysis run)90.8%Not measuredOnly DeepSeek V4 Flash 0731 measured
Humanity's Last Exam (Artificial Analysis run)38.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
GPQA Diamond (Epoch AI run)91.0%47.9%DeepSeek V4 Flash 0731
ARC-AGI89.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ARC-AGI-261.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
SimpleBench61.1%Not measuredOnly DeepSeek V4 Flash 0731 measured
Chess puzzles32.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
Mystery game puzzles34.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
VPCTNot measured40.0%Only GPT-4o (2024-11-20) measured
Neither model has a result on the other 12 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index10
Math benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
AIMENot measured11.9%Only GPT-4o (2024-11-20) measured
MATH 500 (Vals AI)Not measured74.0%Only GPT-4o (2024-11-20) measured
MGSM (Vals AI)Not measured90.4%Only GPT-4o (2024-11-20) measured
OTIS Mock AIME94.4%6.3%DeepSeek V4 Flash 0731
FrontierMath, tiers 1 to 357.5%Not measuredOnly DeepSeek V4 Flash 0731 measured
FrontierMath, tier 424.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
ProofBench56.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
MATH level 5Not measured49.8%Only GPT-4o (2024-11-20) measured
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index22
Knowledge benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
MMLU Pro86.2%72.6%DeepSeek V4 Flash 0731
LegalBench (Vals AI)77.7%82.2%GPT-4o (2024-11-20)
CaseLaw (Vals AI)Not measured59.7%Only GPT-4o (2024-11-20) measured
CorpFin (Vals AI)61.9%45.9%DeepSeek V4 Flash 0731
TaxEval (Vals AI)70.7%74.5%GPT-4o (2024-11-20)
MortgageTax (Vals AI)Not measured57.4%Only GPT-4o (2024-11-20) measured
MedCode (Vals AI)41.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
SimpleQA Verified33.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
GeoBenchNot measured71.0%Only GPT-4o (2024-11-20) measured
Neither model has a result on the other 11 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
Design Arena: websites1237Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: UI components1233Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: game dev1207Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: data viz1180Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: 3D1208Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: all code categories1229Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: SVG1184Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: ASCII art1090Not measuredOnly DeepSeek V4 Flash 0731 measured
Neither model has a result on the other 1 board here
GeneralDirectional onlyPublic boards, shown as published, kept out of the index5 boards, none shared
General benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
MedScribe (Vals AI)80.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
Long context reasoning (AA-LCR)79.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
DTBench90.9%Not measuredOnly DeepSeek V4 Flash 0731 measured
LMCA41.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
Creative writing (Lech Mazur)Not measured81.8%Only GPT-4o (2024-11-20) measured
Neither model has a result on the other 43 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for DeepSeek V4 Flash 0731 and GPT-4o (2024-11-20)
BenchmarkDeepSeek V4 Flash 0731GPT-4o (2024-11-20)Leader
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 0731$0.0003Fits in one request
GPT-4o (2024-11-20)$0.0075Fits in one request

DeepSeek V4 Flash 0731 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0731$0.0078Fits in one request
GPT-4o (2024-11-20)$0.155Fits in one request

DeepSeek V4 Flash 0731 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0731$0.031Fits in one request
GPT-4o (2024-11-20)$0.600Exceeds the context window

DeepSeek V4 Flash 0731 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 0731 and GPT-4o (2024-11-20)
SpecificationDeepSeek V4 Flash 0731OpenAI GPT-4o (2024-11-20)
MakerDeepSeekOpenAI
WeightsOpen weightsNo public weights listed
ReleasedJuly 31, 2026November 20, 2024
Context window1.05M128K
Input $/Mtok$0.14$2.50
Output $/Mtok$0.28$10.00
Coding index51.8Not benchmarked
Independent measurements behind it40
Cost per solved task$0.01Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0731 better than GPT-4o (2024-11-20) for coding?

Only DeepSeek V4 Flash 0731 has a coding score, 51.8 on the Vibe Coding Index; GPT-4o (2024-11-20) has none, so the two cannot be ranked on coding. Pick GPT-4o (2024-11-20) for work measured by LegalBench (Vals AI) or TaxEval (Vals AI), where it leads.

Which is cheaper, DeepSeek V4 Flash 0731 or GPT-4o (2024-11-20)?

DeepSeek V4 Flash 0731 costs $0.14 per million input tokens and $0.28 per million output tokens; GPT-4o (2024-11-20) costs $2.50 and $10.00. Cost per solved task is known for DeepSeek V4 Flash 0731 only.

Which has the bigger context window, DeepSeek V4 Flash 0731 or GPT-4o (2024-11-20)?

DeepSeek V4 Flash 0731, with 1.05M tokens against 128K.

How many benchmarks is the DeepSeek V4 Flash 0731 vs GPT-4o (2024-11-20) comparison based on?

10 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4 Flash 0731's coding index rests on 4 independent benchmarks and GPT-4o (2024-11-20)'s on 0. Where only one model has a result, the page says so instead of naming a winner.

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