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DeepSeek V4.1 Flash vs GPT-5.4 Mini

DeepSeek V4.1 Flash leads GPT-5.4 Mini on coding, 62.5 to 35.8 on the Vibe Coding Index, and DeepSeek V4.1 Flash costs 5.4x less per output token ($0.84 vs $4.50 per million). Updated October 22, 2026; 68 benchmarks have a result for both.

Replace DeepSeek V4.1 Flash Replace GPT-5.4 Mini
DeepSeek V4.1 FlashDeepSeek
Coding
62.5
Overall
62.4
Output $/M
$0.84
65
GPT-5.4 MiniOpenAI
Coding
35.8
Overall
44.0
Output $/M
$4.50
3
vs boards won of 68 shared

DeepSeek V4.1 Flash or GPT-5.4 Mini: which to pick

Pick DeepSeek V4.1 Flash for coding: it scores 62.5 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini.

Pick GPT-5.4 Mini for work measured by SciCode or ALE-Bench, where it leads.

Model ADeepSeek V4.1 FlashDeepSeek62.5/1005 independent benchmarksNo cost per solved taskModel BGPT-5.4 MiniOpenAI35.8/1005 independent benchmarks$0.70 per solved task
Shared results
68
DeepSeek V4.1 Flash only
33
GPT-5.4 Mini only
21
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 V4.1 Flash 62.5 from 5 benchmarks, GPT-5.4 Mini 35.8 from 5 benchmarks.
Widest category
Coding, 20.0 points apart on average over 13 shared benchmarks.
Widest single gap
ARC-AGI-2: DeepSeek V4.1 Flash 72.9% against GPT-5.4 Mini 18.9%, 54.0 points apart on a 0 to 100 scale.
Output price
DeepSeek V4.1 Flash $0.84 against GPT-5.4 Mini $4.50 per million output tokens, 5.4x apart.
Context window
DeepSeek V4.1 Flash takes 1.05M tokens, GPT-5.4 Mini 400K.

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 V4.1 FlashBarsGPT-5.4 MiniTies
Coding112
Intelligence20
Agentic work40
Reasoning110
Math60
Knowledge50
General261
All shared boards653
CodingLike-for-likeSix of these boards feed the Vibe Coding Index112
Coding benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 MiniLeader
LiveBench coding90.2%Not measuredOnly DeepSeek V4.1 Flash measured
LMArena WebDev16181397DeepSeek V4.1 Flash
AA Coding IndexNot measured56.1Only GPT-5.4 Mini measured
LiveCodeBench (Vals AI)Not measured81.5%Only GPT-5.4 Mini measured
SWE-bench Verified (Vals AI)Not measured73.0%Only GPT-5.4 Mini measured
Terminal-Bench 4 (Vals AI)19.7%2.5%DeepSeek V4.1 Flash
Vibe Code Bench (Vals AI)84.7%48.0%DeepSeek V4.1 Flash
Code migration (Vals AI)45.6%12.9%DeepSeek V4.1 Flash
ProgramBench (Vals AI)0.5%0.0%DeepSeek V4.1 Flash
IOI (Vals AI)40.3%Not measuredOnly DeepSeek V4.1 Flash measured
Terminal-Bench 2.1 (Vals AI)74.5%54.7%DeepSeek V4.1 Flash
SWE-bench Multimodal (Vals AI)46.5%Not measuredOnly DeepSeek V4.1 Flash measured
Vibe Code Bench 1-100 (Vals AI)16.4%Not measuredOnly DeepSeek V4.1 Flash measured
SkillsBench (Vals AI)69.8%Not measuredOnly DeepSeek V4.1 Flash measured
CyberBench (Vals AI)73.7%Not measuredOnly DeepSeek V4.1 Flash measured
SciCode51.9%52.1%GPT-5.4 Mini
Terminal-Bench Hard (Artificial Analysis run)Not measured52.3%Only GPT-5.4 Mini measured
FrontierCode43.9%27.0%DeepSeek V4.1 Flash
WeirdMLNot measured60.3%Only GPT-5.4 Mini measured
ALE-Bench1092.31188.6GPT-5.4 Mini
LMArena Text: coding15021438DeepSeek V4.1 Flash
LMArena Text: software and IT14961436DeepSeek V4.1 Flash
LMArena WebDev: React16281386DeepSeek V4.1 Flash
LMArena WebDev: HTML16121419DeepSeek V4.1 Flash
LMArena WebDev: from an image1606Not measuredOnly DeepSeek V4.1 Flash measured
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 MiniLeader
AA Intelligence Index24.724.1DeepSeek V4.1 Flash
Epoch Capabilities Index155.9148.7DeepSeek V4.1 Flash
Agentic workLike-for-likePublic boards, shown as published, kept out of the index40
Agentic work benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 MiniLeader
AA Agentic IndexNot measured17.9Only GPT-5.4 Mini measured
LiveBench research86.8%Not measuredOnly DeepSeek V4.1 Flash measured
LiveBench browser84.0%Not measuredOnly DeepSeek V4.1 Flash measured
LiveBench long agentic40.1%Not measuredOnly DeepSeek V4.1 Flash measured
SREBench (Vals AI)0.8%Not measuredOnly DeepSeek V4.1 Flash measured
Finance Agent (Vals AI)53.5%45.4%DeepSeek V4.1 Flash
Tax Agent Bench (Vals AI)26.6%8.8%DeepSeek V4.1 Flash
Legal Research Bench (Vals AI)41.4%12.5%DeepSeek V4.1 Flash
Excel Modeling Benchmark (Vals AI)57.2%45.4%DeepSeek V4.1 Flash
BioMysteryBench (Vals AI)67.8%Not measuredOnly DeepSeek V4.1 Flash measured
Terminal-Bench-Science (Vals AI)0.0%Not measuredOnly DeepSeek V4.1 Flash measured
Vals Science Index29.6%Not measuredOnly DeepSeek V4.1 Flash measured
τ²-Bench TelecomNot measured83.3%Only GPT-5.4 Mini measured
APEX-Agents39.5%Not measuredOnly DeepSeek V4.1 Flash measured
DeepResearch BenchNot measured36.3%Only GPT-5.4 Mini measured
Neither model has a result on the other 26 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index110
Reasoning benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 MiniLeader
GPQA DiamondNot measured83.1%Only GPT-5.4 Mini measured
LiveBench reasoning86.7%Not measuredOnly DeepSeek V4.1 Flash measured
MysteryMechanism (Vals AI)21.2%Not measuredOnly DeepSeek V4.1 Flash measured
MMMU Pro (Vals AI)Not measured79.3%Only GPT-5.4 Mini measured
GPQA Diamond (Artificial Analysis run)Not measured87.5%Only GPT-5.4 Mini measured
Humanity's Last Exam (Artificial Analysis run)39.2%28.1%DeepSeek V4.1 Flash
GPQA Diamond (Epoch AI run)89.8%86.9%DeepSeek V4.1 Flash
ARC-AGI94.5%63.7%DeepSeek V4.1 Flash
ARC-AGI-272.9%18.9%DeepSeek V4.1 Flash
Chess puzzles48.0%23.0%DeepSeek V4.1 Flash
Mystery game puzzles43.0%11.0%DeepSeek V4.1 Flash
LMArena Text: hard prompts14831424DeepSeek V4.1 Flash
LMArena Text: expert15011435DeepSeek V4.1 Flash
LMArena Text: hard prompts in English14881420DeepSeek V4.1 Flash
LMArena Vision: diagrams12971266DeepSeek V4.1 Flash
LMArena Vision: homework13071285DeepSeek V4.1 Flash
Kagi LLM BenchmarkNot measured37.9%Only GPT-5.4 Mini measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 MiniLeader
AIMENot measured95.6%Only GPT-5.4 Mini measured
OTIS Mock AIME98.3%88.9%DeepSeek V4.1 Flash
FrontierMath, tiers 1 to 367.4%51.2%DeepSeek V4.1 Flash
FrontierMath, tier 426.8%9.8%DeepSeek V4.1 Flash
ProofBench54.0%21.0%DeepSeek V4.1 Flash
LMArena Text: math14781418DeepSeek V4.1 Flash
LMArena Text: mathematical work14851429DeepSeek V4.1 Flash
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
Knowledge benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 MiniLeader
MMLU ProNot measured84.5%Only GPT-5.4 Mini measured
LegalBench (Vals AI)83.3%Not measuredOnly DeepSeek V4.1 Flash measured
CaseLaw (Vals AI)Not measured51.7%Only GPT-5.4 Mini measured
CorpFin (Vals AI)Not measured60.9%Only GPT-5.4 Mini measured
TaxEval (Vals AI)Not measured71.2%Only GPT-5.4 Mini measured
MortgageTax (Vals AI)Not measured63.5%Only GPT-5.4 Mini measured
MedCode (Vals AI)41.2%Not measuredOnly DeepSeek V4.1 Flash measured
SimpleQA Verified42.9%29.4%DeepSeek V4.1 Flash
LMArena Text: science14691417DeepSeek V4.1 Flash
LMArena Text: medicine and healthcare14841395DeepSeek V4.1 Flash
LMArena Text: legal and government14431414DeepSeek V4.1 Flash
LMArena Text: business and finance14611418DeepSeek V4.1 Flash
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Web design benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 MiniLeader
Design Arena: websites1308Not measuredOnly DeepSeek V4.1 Flash measured
Design Arena: UI components1312Not measuredOnly DeepSeek V4.1 Flash measured
Design Arena: game dev1330Not measuredOnly DeepSeek V4.1 Flash measured
Design Arena: data viz1291Not measuredOnly DeepSeek V4.1 Flash measured
Design Arena: 3D1355Not measuredOnly DeepSeek V4.1 Flash measured
Design Arena: all code categories1320Not measuredOnly DeepSeek V4.1 Flash measured
Design Arena: SVG1245Not measuredOnly DeepSeek V4.1 Flash measured
Design Arena: ASCII art1265Not measuredOnly DeepSeek V4.1 Flash measured
LiveBench design79.2%Not measuredOnly DeepSeek V4.1 Flash measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index261
General benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 MiniLeader
LiveBench data analysis79.3%Not measuredOnly DeepSeek V4.1 Flash measured
Public Benefits Bench (Vals AI)64.3%Not measuredOnly DeepSeek V4.1 Flash measured
SAGE (Vals AI)47.9%50.8%GPT-5.4 Mini
MedScribe (Vals AI)85.5%Not measuredOnly DeepSeek V4.1 Flash measured
Vals Multimodal IndexNot measured54.2%Only GPT-5.4 Mini measured
IFBenchNot measured73.3%Only GPT-5.4 Mini measured
Long context reasoning (AA-LCR)84.0%77.0%DeepSeek V4.1 Flash
DTBench89.9%80.0%DeepSeek V4.1 Flash
LMCA47.0%40.8%DeepSeek V4.1 Flash
Surface Evolver Bench46.3%Not measuredOnly DeepSeek V4.1 Flash measured
Furniture assembly34.2%Not measuredOnly DeepSeek V4.1 Flash measured
LMArena Text14641412DeepSeek V4.1 Flash
LMArena Text: instruction following14731405DeepSeek V4.1 Flash
LMArena Text: creative writing14371370DeepSeek V4.1 Flash
LMArena Vision12781245DeepSeek V4.1 Flash
LMArena Text: English14731412DeepSeek V4.1 Flash
LMArena Text: non-English14491405DeepSeek V4.1 Flash
LMArena Text: Chinese15011446DeepSeek V4.1 Flash
LMArena Text: German14701408DeepSeek V4.1 Flash
LMArena Text: Japanese14321375DeepSeek V4.1 Flash
LMArena Text: Korean14361370DeepSeek V4.1 Flash
LMArena Text: French14651441DeepSeek V4.1 Flash
LMArena Text: Spanish14591405DeepSeek V4.1 Flash
LMArena Text: Russian14671417DeepSeek V4.1 Flash
LMArena Text: Polish14571415DeepSeek V4.1 Flash
LMArena Text: multi-turn14611429DeepSeek V4.1 Flash
LMArena Text: longer queries14731408DeepSeek V4.1 Flash
LMArena Text: writing and language14501393DeepSeek V4.1 Flash
LMArena Text: entertainment and media14451373DeepSeek V4.1 Flash
LMArena Vision: English12881244DeepSeek V4.1 Flash
LMArena Vision: Chinese13271286DeepSeek V4.1 Flash
LMArena Vision: reading text12821253DeepSeek V4.1 Flash
LMArena Vision: humor12601235DeepSeek V4.1 Flash
LMArena Vision: recognizing thingsNot measured1218Only GPT-5.4 Mini measured
LMArena Vision: creative writing12751222DeepSeek V4.1 Flash
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for DeepSeek V4.1 Flash and GPT-5.4 Mini
BenchmarkDeepSeek V4.1 FlashGPT-5.4 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 V4.1 Flash$0.0006Fits in one request
GPT-5.4 Mini$0.0030Fits in one request

DeepSeek V4.1 Flash costs less

Repository review

50K input + 3K output tokens

DeepSeek V4.1 Flash$0.014Fits in one request
GPT-5.4 Mini$0.051Fits in one request

DeepSeek V4.1 Flash costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4.1 Flash$0.053Fits in one request
GPT-5.4 Mini$0.195Fits in one request

DeepSeek V4.1 Flash 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 V4.1 Flash and GPT-5.4 Mini
SpecificationDeepSeek V4.1 FlashOpenAI GPT-5.4 Mini
MakerDeepSeekOpenAI
WeightsOpen weightsNo public weights listed
ReleasedSeptember 10, 2026March 17, 2026
Context window1.05M400K
Input $/Mtok$0.2225$0.75
Output $/Mtok$0.84$4.50
Coding index62.535.8
Independent measurements behind it55
Cost per solved taskNot computable$0.70
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4.1 Flash better than GPT-5.4 Mini for coding?

Pick DeepSeek V4.1 Flash for coding: it scores 62.5 on the Vibe Coding Index against 35.8 for GPT-5.4 Mini. Pick GPT-5.4 Mini for work measured by SciCode or ALE-Bench, where it leads.

Which is cheaper, DeepSeek V4.1 Flash or GPT-5.4 Mini?

DeepSeek V4.1 Flash costs $0.2225 per million input tokens and $0.84 per million output tokens; GPT-5.4 Mini costs $0.75 and $4.50. Cost per solved task is known for GPT-5.4 Mini only.

Which has the bigger context window, DeepSeek V4.1 Flash or GPT-5.4 Mini?

DeepSeek V4.1 Flash, with 1.05M tokens against 400K.

How many benchmarks is the DeepSeek V4.1 Flash vs GPT-5.4 Mini comparison based on?

68 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4.1 Flash's coding index rests on 5 independent benchmarks and GPT-5.4 Mini's on 5. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/deepseek-v4-1-flash-vs-gpt-5-4-mini">LLMBenchmark.ai, DeepSeek V4.1 Flash vs GPT-5.4 Mini</a></p>