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DeepSeek V4 Flash 0731 vs GPT-4o-mini

DeepSeek V4 Flash 0731 leads GPT-4o-mini on the Artificial Analysis Intelligence Index, 34.3 to 6.7, and DeepSeek V4 Flash 0731 costs 2.1x less per output token ($0.28 vs $0.60 per million). Updated October 21, 2026; 13 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0731 Replace GPT-4o-mini
DeepSeek V4 Flash 0731DeepSeek
Coding
51.8
Overall
55.2
Output $/M
$0.28
13
GPT-4o-miniOpenAI
Coding
No data
Overall
No data
Output $/M
$0.60
0
vs boards won of 13 shared

DeepSeek V4 Flash 0731 or GPT-4o-mini: which to pick

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

Compare them on price, context and the boards below.

Model ADeepSeek V4 Flash 0731DeepSeek51.8/1004 independent benchmarks$0.01 per solved taskModel BGPT-4o-miniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
13
DeepSeek V4 Flash 0731 only
42
GPT-4o-mini only
16
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-mini not benchmarked.
Widest category
Coding, 59.3 points apart on average over 2 shared benchmarks.
Widest single gap
ARC-AGI-2: DeepSeek V4 Flash 0731 61.4% against GPT-4o-mini 0.0%, 61.4 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0731 $0.28 against GPT-4o-mini $0.60 per million output tokens, 2.1x apart.
Context window
DeepSeek V4 Flash 0731 takes 1.05M tokens, GPT-4o-mini 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-miniTies
Coding20
Intelligence20
Reasoning40
Knowledge30
General20
All shared boards130
CodingLike-for-likeSix of these boards feed the Vibe Coding Index20
Coding benchmarks for DeepSeek V4 Flash 0731 and GPT-4o-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-miniLeader
AA Coding Index69.111.4DeepSeek V4 Flash 0731
LiveCodeBench (Vals AI)87.3%26.4%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
LiveCodeBench (Artificial Analysis run)Not measured23.4%Only GPT-4o-mini measured
SciCode50.3%Not measuredOnly DeepSeek V4 Flash 0731 measured
FrontierCode18.8%Not measuredOnly DeepSeek V4 Flash 0731 measured
WeirdML63.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ALE-Bench1306.1Not measuredOnly DeepSeek V4 Flash 0731 measured
SciCodeNot measured1.5%Only GPT-4o-mini measured
Neither model has a result on the other 22 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for DeepSeek V4 Flash 0731 and GPT-4o-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-miniLeader
AA Intelligence Index34.36.7DeepSeek V4 Flash 0731
Epoch Capabilities Index154.8126.5DeepSeek V4 Flash 0731
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
Agentic work benchmarks for DeepSeek V4 Flash 0731 and GPT-4o-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-miniLeader
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
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index40
Reasoning benchmarks for DeepSeek V4 Flash 0731 and GPT-4o-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-miniLeader
GPQA Diamond89.9%44.2%DeepSeek V4 Flash 0731
MMMU Pro (Vals AI)Not measured56.6%Only GPT-4o-mini measured
GPQA Diamond (Artificial Analysis run)90.8%42.6%DeepSeek V4 Flash 0731
Humanity's Last Exam (Artificial Analysis run)38.6%4.2%DeepSeek V4 Flash 0731
GPQA Diamond (Epoch AI run)91.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ARC-AGI89.0%Not measuredOnly DeepSeek V4 Flash 0731 measured
ARC-AGI-261.4%0.0%DeepSeek V4 Flash 0731
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
Kagi LLM BenchmarkNot measured28.8%Only GPT-4o-mini measured
Neither model has a result on the other 11 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index10 boards, none shared
Math benchmarks for DeepSeek V4 Flash 0731 and GPT-4o-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-miniLeader
AIMENot measured11.5%Only GPT-4o-mini measured
MATH 500 (Vals AI)Not measured72.6%Only GPT-4o-mini measured
MGSM (Vals AI)Not measured86.2%Only GPT-4o-mini measured
AA Math IndexNot measured14.7Only GPT-4o-mini measured
AIME 2025 (Artificial Analysis run)Not measured14.7%Only GPT-4o-mini measured
OTIS Mock AIME94.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
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
GSM8KNot measured91.3%Only GPT-4o-mini measured
Neither model has a result on the other 3 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index30
Knowledge benchmarks for DeepSeek V4 Flash 0731 and GPT-4o-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-miniLeader
MMLU Pro86.2%62.7%DeepSeek V4 Flash 0731
LegalBench (Vals AI)77.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
CorpFin (Vals AI)61.9%45.5%DeepSeek V4 Flash 0731
TaxEval (Vals AI)70.7%60.5%DeepSeek V4 Flash 0731
MortgageTax (Vals AI)Not measured54.5%Only GPT-4o-mini measured
MedQA (Vals AI)Not measured72.4%Only GPT-4o-mini measured
MedCode (Vals AI)41.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
MMLU Pro (Artificial Analysis run)Not measured64.8%Only GPT-4o-mini measured
SimpleQA Verified33.6%Not measuredOnly DeepSeek V4 Flash 0731 measured
MMLUNot measured81.8%Only GPT-4o-mini measured
Neither model has a result on the other 8 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-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-miniLeader
Design Arena: websites1238Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: UI components1235Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: game dev1208Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: data viz1180Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: 3D1209Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: all code categories1230Not measuredOnly DeepSeek V4 Flash 0731 measured
Design Arena: SVG1185Not 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
GeneralLike-for-likePublic boards, shown as published, kept out of the index20
General benchmarks for DeepSeek V4 Flash 0731 and GPT-4o-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-miniLeader
MedScribe (Vals AI)80.4%Not measuredOnly DeepSeek V4 Flash 0731 measured
IFBenchNot measured31.0%Only GPT-4o-mini measured
Long context reasoning (AA-LCR)79.7%Not measuredOnly DeepSeek V4 Flash 0731 measured
DTBench90.9%54.4%DeepSeek V4 Flash 0731
LMCA41.7%10.4%DeepSeek V4 Flash 0731
PIQANot measured88.7%Only GPT-4o-mini measured
Neither model has a result on the other 40 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-mini
BenchmarkDeepSeek V4 Flash 0731GPT-4o-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 0731$0.0003Fits in one request
GPT-4o-mini$0.0004Fits 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-mini$0.0093Fits 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-mini$0.036Exceeds 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-mini
SpecificationDeepSeek V4 Flash 0731OpenAI GPT-4o-mini
MakerDeepSeekOpenAI
WeightsOpen weightsNo public weights listed
ReleasedJuly 31, 2026July 18, 2024
Context window1.05M128K
Input $/Mtok$0.14$0.15
Output $/Mtok$0.28$0.60
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-mini for coding?

Only DeepSeek V4 Flash 0731 has a coding score, 51.8 on the Vibe Coding Index; GPT-4o-mini has none, so the two cannot be ranked on coding. Compare them on price, context and the boards below.

Which is cheaper, DeepSeek V4 Flash 0731 or GPT-4o-mini?

DeepSeek V4 Flash 0731 costs $0.14 per million input tokens and $0.28 per million output tokens; GPT-4o-mini costs $0.15 and $0.60. 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-mini?

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

How many benchmarks is the DeepSeek V4 Flash 0731 vs GPT-4o-mini comparison based on?

13 benchmarks have a result for both models as of October 21, 2026. DeepSeek V4 Flash 0731's coding index rests on 4 independent benchmarks and GPT-4o-mini's on 0. Where only one model has a result, the page says so instead of naming a winner.

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