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DeepSeek V3.1 Terminus vs GPT-4.1 Mini

DeepSeek V3.1 Terminus leads GPT-4.1 Mini on the Artificial Analysis Intelligence Index, 14.8 to 10.2, and DeepSeek V3.1 Terminus costs 1.6x less per output token ($1.0142 vs $1.60 per million). Updated October 22, 2026; 41 benchmarks have a result for both.

Replace DeepSeek V3.1 Terminus Replace GPT-4.1 Mini
DeepSeek V3.1 TerminusDeepSeek
Coding
No data
Overall
No data
Output $/M
$1.0142
40
GPT-4.1 MiniOpenAI
Coding
No data
Overall
31.9
Output $/M
$1.60
1
vs boards won of 41 shared

DeepSeek V3.1 Terminus or GPT-4.1 Mini: which to pick

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

Pick DeepSeek V3.1 Terminus for output tokens 1.6x cheaper ($1.0142 vs $1.60 per million) and work measured by τ²-Bench Telecom, where it leads.

Model ADeepSeek V3.1 TerminusDeepSeekNot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-4.1 MiniOpenAINot benchmarkedNo coding benchmark$1.818 per solved task
Shared results
41
DeepSeek V3.1 Terminus only
4
GPT-4.1 Mini only
45
Like-for-like categories
8 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 V3.1 Terminus not benchmarked, GPT-4.1 Mini not benchmarked.
Widest category
Math, 32.2 points apart on average over 3 shared benchmarks.
Widest single gap
AA Math Index: DeepSeek V3.1 Terminus 89.7 against GPT-4.1 Mini 46.3, 43.4 points apart on a 0 to 100 scale.
Output price
DeepSeek V3.1 Terminus $1.0142 against GPT-4.1 Mini $1.60 per million output tokens, 1.6x apart.
Context window
DeepSeek V3.1 Terminus takes 164K tokens, GPT-4.1 Mini 1.05M.

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 V3.1 TerminusBarsGPT-4.1 MiniTies
Coding50
Intelligence10
Agentic work01
Reasoning50
Math30
Knowledge50
Web design60
General150
All shared boards401
CodingLike-for-likeSix of these boards feed the Vibe Coding Index50
Coding benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 MiniLeader
Aider polyglotNot measured32.4%Only GPT-4.1 Mini measured
SWE-bench VerifiedNot measured23.9%Only GPT-4.1 Mini measured
AA Coding Index43.520.2DeepSeek V3.1 Terminus
LiveCodeBench (Vals AI)Not measured58.2%Only GPT-4.1 Mini measured
LiveCodeBench (Artificial Analysis run)79.8%48.3%DeepSeek V3.1 Terminus
SciCode38.0%Not measuredOnly DeepSeek V3.1 Terminus measured
Terminal-Bench Hard (Artificial Analysis run)31.8%7.6%DeepSeek V3.1 Terminus
WeirdMLNot measured37.6%Only GPT-4.1 Mini measured
ALE-Bench745.2Not measuredOnly DeepSeek V3.1 Terminus measured
LMArena Text: coding14251367DeepSeek V3.1 Terminus
LMArena Text: software and IT14261360DeepSeek V3.1 Terminus
Neither model has a result on the other 28 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 MiniLeader
AA Intelligence Index14.810.2DeepSeek V3.1 Terminus
Epoch Capabilities IndexNot measured134.9Only GPT-4.1 Mini measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 MiniLeader
AA Agentic Index6.8Not measuredOnly DeepSeek V3.1 Terminus measured
τ²-Bench Telecom37.1%52.9%GPT-4.1 Mini
Berkeley Function Calling Leaderboard (BFCL)Not measured50.4%Only GPT-4.1 Mini measured
Neither model has a result on the other 38 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 MiniLeader
GPQA DiamondNot measured67.9%Only GPT-4.1 Mini measured
MMMU Pro (Vals AI)Not measured70.5%Only GPT-4.1 Mini measured
GPQA Diamond (Artificial Analysis run)79.2%66.4%DeepSeek V3.1 Terminus
Humanity's Last Exam (Artificial Analysis run)16.4%5.0%DeepSeek V3.1 Terminus
GPQA Diamond (Epoch AI run)Not measured65.8%Only GPT-4.1 Mini measured
ARC-AGINot measured3.5%Only GPT-4.1 Mini measured
ARC-AGI-2Not measured0.0%Only GPT-4.1 Mini measured
Chess puzzlesNot measured1.0%Only GPT-4.1 Mini measured
Mystery game puzzlesNot measured7.0%Only GPT-4.1 Mini measured
LMArena Text: hard prompts14261349DeepSeek V3.1 Terminus
LMArena Text: expertNot measured1338Only GPT-4.1 Mini measured
LMArena Text: hard prompts in English14321362DeepSeek V3.1 Terminus
LMArena Vision: diagramsNot measured1182Only GPT-4.1 Mini measured
LMArena Vision: homeworkNot measured1214Only GPT-4.1 Mini measured
Kagi LLM Benchmark57.4%48.6%DeepSeek V3.1 Terminus
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 MiniLeader
AIMENot measured49.4%Only GPT-4.1 Mini measured
MATH 500 (Vals AI)Not measured88.0%Only GPT-4.1 Mini measured
MGSM (Vals AI)Not measured87.8%Only GPT-4.1 Mini measured
AA Math Index89.746.3DeepSeek V3.1 Terminus
AIME 2025 (Artificial Analysis run)89.7%46.3%DeepSeek V3.1 Terminus
OTIS Mock AIMENot measured44.7%Only GPT-4.1 Mini measured
FrontierMath, tiers 1 to 3Not measured6.7%Only GPT-4.1 Mini measured
MATH level 5Not measured87.3%Only GPT-4.1 Mini measured
LMArena Text: math14021343DeepSeek V3.1 Terminus
LMArena Text: mathematical workNot measured1347Only GPT-4.1 Mini measured
Neither model has a result on the other 3 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
Knowledge benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 MiniLeader
MMLU ProNot measured77.2%Only GPT-4.1 Mini measured
LegalBench (Vals AI)Not measured78.0%Only GPT-4.1 Mini measured
CorpFin (Vals AI)Not measured57.9%Only GPT-4.1 Mini measured
TaxEval (Vals AI)Not measured71.9%Only GPT-4.1 Mini measured
MortgageTax (Vals AI)Not measured65.5%Only GPT-4.1 Mini measured
MedQA (Vals AI)Not measured84.6%Only GPT-4.1 Mini measured
MMLU Pro (Artificial Analysis run)85.1%78.1%DeepSeek V3.1 Terminus
SimpleQA VerifiedNot measured12.7%Only GPT-4.1 Mini measured
LMArena Text: science14511328DeepSeek V3.1 Terminus
LMArena Text: medicine and healthcare14681324DeepSeek V3.1 Terminus
LMArena Text: legal and government14571343DeepSeek V3.1 Terminus
LMArena Text: business and finance14141322DeepSeek V3.1 Terminus
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 MiniLeader
Design Arena: websites1187997DeepSeek V3.1 Terminus
Design Arena: UI components1182958DeepSeek V3.1 Terminus
Design Arena: game dev11311070DeepSeek V3.1 Terminus
Design Arena: data viz11681034DeepSeek V3.1 Terminus
Design Arena: 3D1141836DeepSeek V3.1 Terminus
Design Arena: all code categories1175993DeepSeek V3.1 Terminus
Design Arena: SVG1065Not measuredOnly DeepSeek V3.1 Terminus measured
Neither model has a result on the other 2 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index150
General benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 MiniLeader
IFBench57.0%38.3%DeepSeek V3.1 Terminus
Long context reasoning (AA-LCR)69.3%44.0%DeepSeek V3.1 Terminus
DTBench81.3%68.8%DeepSeek V3.1 Terminus
LMCA28.6%21.1%DeepSeek V3.1 Terminus
Fiction.LiveBenchNot measured44.4%Only GPT-4.1 Mini measured
LMArena Text14191341DeepSeek V3.1 Terminus
LMArena Text: instruction following14041333DeepSeek V3.1 Terminus
LMArena Text: creative writing14031299DeepSeek V3.1 Terminus
LMArena VisionNot measured1181Only GPT-4.1 Mini measured
LMArena Text: English14291356DeepSeek V3.1 Terminus
LMArena Text: non-English14081318DeepSeek V3.1 Terminus
LMArena Text: ChineseNot measured1329Only GPT-4.1 Mini measured
LMArena Text: GermanNot measured1350Only GPT-4.1 Mini measured
LMArena Text: JapaneseNot measured1290Only GPT-4.1 Mini measured
LMArena Text: KoreanNot measured1298Only GPT-4.1 Mini measured
LMArena Text: FrenchNot measured1358Only GPT-4.1 Mini measured
LMArena Text: SpanishNot measured1319Only GPT-4.1 Mini measured
LMArena Text: Russian14351324DeepSeek V3.1 Terminus
LMArena Text: Polish14271326DeepSeek V3.1 Terminus
LMArena Text: multi-turn14111354DeepSeek V3.1 Terminus
LMArena Text: longer queries14221344DeepSeek V3.1 Terminus
LMArena Text: writing and language14091319DeepSeek V3.1 Terminus
LMArena Text: entertainment and media13911300DeepSeek V3.1 Terminus
LMArena Vision: EnglishNot measured1191Only GPT-4.1 Mini measured
LMArena Vision: ChineseNot measured1186Only GPT-4.1 Mini measured
LMArena Vision: reading textNot measured1188Only GPT-4.1 Mini measured
LMArena Vision: humorNot measured1182Only GPT-4.1 Mini measured
LMArena Vision: captioningNot measured1174Only GPT-4.1 Mini measured
LMArena Vision: recognizing thingsNot measured1187Only GPT-4.1 Mini measured
LMArena Vision: creative writingNot measured1182Only GPT-4.1 Mini measured
Neither model has a result on the other 16 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for DeepSeek V3.1 Terminus and GPT-4.1 Mini
BenchmarkDeepSeek V3.1 TerminusGPT-4.1 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 V3.1 Terminus$0.0008Fits in one request
GPT-4.1 Mini$0.0012Fits in one request

DeepSeek V3.1 Terminus costs less

Repository review

50K input + 3K output tokens

DeepSeek V3.1 Terminus$0.018Fits in one request
GPT-4.1 Mini$0.025Fits in one request

DeepSeek V3.1 Terminus costs less

Agent loop

200K input + 10K output tokens

DeepSeek V3.1 Terminus$0.071Exceeds the context window
GPT-4.1 Mini$0.096Fits in one request

DeepSeek V3.1 Terminus 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 V3.1 Terminus and GPT-4.1 Mini
SpecificationDeepSeek V3.1 TerminusOpenAI GPT-4.1 Mini
MakerDeepSeekOpenAI
WeightsOpen weightsNo public weights listed
ReleasedSeptember 22, 2025April 14, 2025
Context window164K1.05M
Input $/Mtok$0.3063$0.40
Output $/Mtok$1.0142$1.60
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computable$1.818
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V3.1 Terminus better than GPT-4.1 Mini for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick DeepSeek V3.1 Terminus for output tokens 1.6x cheaper ($1.0142 vs $1.60 per million) and work measured by τ²-Bench Telecom, where it leads.

Which is cheaper, DeepSeek V3.1 Terminus or GPT-4.1 Mini?

DeepSeek V3.1 Terminus costs $0.3063 per million input tokens and $1.0142 per million output tokens; GPT-4.1 Mini costs $0.40 and $1.60. Cost per solved task is known for GPT-4.1 Mini only.

Which has the bigger context window, DeepSeek V3.1 Terminus or GPT-4.1 Mini?

GPT-4.1 Mini, with 1.05M tokens against 164K.

How many benchmarks is the DeepSeek V3.1 Terminus vs GPT-4.1 Mini comparison based on?

41 benchmarks have a result for both models as of October 22, 2026. DeepSeek V3.1 Terminus's coding index rests on 0 independent benchmarks and GPT-4.1 Mini's on 0. Where only one model has a result, the page says so instead of naming a winner.

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