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GPT-4.1 Mini vs GPT-5.1

GPT-5.1 leads GPT-4.1 Mini on the Artificial Analysis Intelligence Index, 24.7 to 10.2, and GPT-4.1 Mini costs 6.3x less per output token ($1.60 vs $10.00 per million). Updated October 22, 2026; 79 benchmarks have a result for both.

Replace GPT-4.1 Mini Replace GPT-5.1
GPT-4.1 MiniOpenAI
Coding
No data
Overall
31.9
Output $/M
$1.60
1
GPT-5.1OpenAI
Coding
40.4
Overall
55.0
Output $/M
$10.00
78
vs boards won of 79 shared

GPT-4.1 Mini or GPT-5.1: which to pick

Only GPT-5.1 has a coding score, 40.4 on the Vibe Coding Index; GPT-4.1 Mini has none, so the two cannot be ranked on coding.

Pick GPT-4.1 Mini for output tokens 6.3x cheaper ($1.60 vs $10.00 per million) and a larger context window (1.05M against 400K tokens).

Model AGPT-4.1 MiniOpenAINot benchmarkedNo coding benchmark$1.818 per solved taskModel BGPT-5.1OpenAI40.4/1003 independent benchmarks$1.02 per solved task
Shared results
79
GPT-4.1 Mini only
7
GPT-5.1 only
22
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
GPT-4.1 Mini not benchmarked, GPT-5.1 40.4 from 3 benchmarks.
Widest category
Math, 31.8 points apart on average over 7 shared benchmarks.
Widest single gap
ARC-AGI: GPT-4.1 Mini 3.5% against GPT-5.1 72.8%, 69.3 points apart on a 0 to 100 scale.
Output price
GPT-4.1 Mini $1.60 against GPT-5.1 $10.00 per million output tokens, 6.3x apart.
Context window
GPT-4.1 Mini takes 1.05M tokens, GPT-5.1 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
CategoryGPT-4.1 MiniBarsGPT-5.1Ties
Coding08
Intelligence02
Agentic work01
Reasoning014
Math07
Knowledge111
Web design06
General029
All shared boards178
CodingLike-for-likeSix of these boards feed the Vibe Coding Index08
Coding benchmarks for GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
Aider polyglot32.4%Not measuredOnly GPT-4.1 Mini measured
SWE-bench Verified23.9%66.0%GPT-5.1
LMArena WebDevNot measured1396Only GPT-5.1 measured
AA Coding Index20.249.4GPT-5.1
LiveCodeBench (Vals AI)58.2%86.5%GPT-5.1
SWE-bench Verified (Vals AI)Not measured69.8%Only GPT-5.1 measured
Vibe Code Bench (Vals AI)Not measured24.6%Only GPT-5.1 measured
LiveCodeBench (Artificial Analysis run)48.3%86.8%GPT-5.1
Terminal-Bench Hard (Artificial Analysis run)7.6%45.5%GPT-5.1
Terminal-BenchNot measured47.6%Only GPT-5.1 measured
GSO-BenchNot measured13.7%Only GPT-5.1 measured
WeirdML37.6%60.8%GPT-5.1
LMArena Text: coding13671453GPT-5.1
LMArena Text: software and IT13601454GPT-5.1
LMArena WebDev: ReactNot measured1307Only GPT-5.1 measured
LMArena WebDev: HTMLNot measured1405Only GPT-5.1 measured
LMArena WebDev: from an imageNot measured1421Only GPT-5.1 measured
Neither model has a result on the other 22 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
AA Intelligence Index10.224.7GPT-5.1
Epoch Capabilities Index134.9149.8GPT-5.1
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
τ²-Bench Telecom52.9%81.9%GPT-5.1
DeepResearch BenchNot measured42.8%Only GPT-5.1 measured
Vending-Bench 2Not measured$1,473Only GPT-5.1 measured
Berkeley Function Calling Leaderboard (BFCL)50.4%Not measuredOnly GPT-4.1 Mini measured
Neither model has a result on the other 37 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index014
Reasoning benchmarks for GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
GPQA Diamond67.9%86.6%GPT-5.1
MMMU Pro (Vals AI)70.5%83.2%GPT-5.1
GPQA Diamond (Artificial Analysis run)66.4%87.3%GPT-5.1
Humanity's Last Exam (Artificial Analysis run)5.0%28.5%GPT-5.1
GPQA Diamond (Epoch AI run)65.8%87.6%GPT-5.1
ARC-AGI3.5%72.8%GPT-5.1
ARC-AGI-20.0%17.6%GPT-5.1
SimpleBenchNot measured53.2%Only GPT-5.1 measured
Chess puzzles1.0%42.0%GPT-5.1
Mystery game puzzles7.0%19.0%GPT-5.1
VPCTNot measured58.7%Only GPT-5.1 measured
LMArena Text: hard prompts13491457GPT-5.1
LMArena Text: expert13381470GPT-5.1
LMArena Text: hard prompts in English13621462GPT-5.1
LMArena Vision: diagrams11821264GPT-5.1
LMArena Vision: homework12141272GPT-5.1
Kagi LLM Benchmark48.6%Not measuredOnly GPT-4.1 Mini measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index07
Math benchmarks for GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
AIME49.4%93.3%GPT-5.1
MATH 500 (Vals AI)88.0%Not measuredOnly GPT-4.1 Mini measured
MGSM (Vals AI)87.8%93.0%GPT-5.1
AA Math Index46.394.0GPT-5.1
AIME 2025 (Artificial Analysis run)46.3%94.0%GPT-5.1
OTIS Mock AIME44.7%88.6%GPT-5.1
FrontierMath, tiers 1 to 36.7%Not measuredOnly GPT-4.1 Mini measured
MATH level 587.3%Not measuredOnly GPT-4.1 Mini measured
LMArena Text: math13431446GPT-5.1
LMArena Text: mathematical work13471449GPT-5.1
Neither model has a result on the other 3 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index111
Knowledge benchmarks for GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
MMLU Pro77.2%86.4%GPT-5.1
LegalBench (Vals AI)78.0%85.7%GPT-5.1
CaseLaw (Vals AI)Not measured73.4%Only GPT-5.1 measured
CorpFin (Vals AI)57.9%63.8%GPT-5.1
TaxEval (Vals AI)71.9%74.9%GPT-5.1
MortgageTax (Vals AI)65.5%61.4%GPT-4.1 Mini
MedQA (Vals AI)84.6%96.4%GPT-5.1
MedCode (Vals AI)Not measured52.7%Only GPT-5.1 measured
MMLU Pro (Artificial Analysis run)78.1%87.0%GPT-5.1
SimpleQA Verified12.7%48.0%GPT-5.1
LMArena Text: science13281459GPT-5.1
LMArena Text: medicine and healthcare13241456GPT-5.1
LMArena Text: legal and government13431459GPT-5.1
LMArena Text: business and finance13221431GPT-5.1
FACTS Benchmark SuiteNot measured45.0%Only GPT-5.1 measured
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
Design Arena: websites9971187GPT-5.1
Design Arena: UI components9581163GPT-5.1
Design Arena: game dev10701178GPT-5.1
Design Arena: data viz10341204GPT-5.1
Design Arena: 3D8361060GPT-5.1
Design Arena: all code categories9931170GPT-5.1
Design Arena: SVGNot measured1149Only GPT-5.1 measured
Design Arena: ASCII artNot measured1119Only GPT-5.1 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index029
General benchmarks for GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
SAGE (Vals AI)Not measured43.2%Only GPT-5.1 measured
MedScribe (Vals AI)Not measured88.1%Only GPT-5.1 measured
IFBench38.3%72.9%GPT-5.1
Long context reasoning (AA-LCR)44.0%80.0%GPT-5.1
DTBench68.8%90.1%GPT-5.1
LMCA21.1%43.9%GPT-5.1
Fiction.LiveBench44.4%Not measuredOnly GPT-4.1 Mini measured
CL-benchNot measured23.7%Only GPT-5.1 measured
CL-bench LifeNot measured17.3%Only GPT-5.1 measured
LMArena Text13411443GPT-5.1
LMArena Text: instruction following13331443GPT-5.1
LMArena Text: creative writing12991427GPT-5.1
LMArena Vision11811250GPT-5.1
LMArena Text: English13561451GPT-5.1
LMArena Text: non-English13181431GPT-5.1
LMArena Text: Chinese13291495GPT-5.1
LMArena Text: German13501438GPT-5.1
LMArena Text: Japanese12901453GPT-5.1
LMArena Text: Korean12981401GPT-5.1
LMArena Text: French13581450GPT-5.1
LMArena Text: Spanish13191433GPT-5.1
LMArena Text: Russian13241435GPT-5.1
LMArena Text: Polish13261440GPT-5.1
LMArena Text: multi-turn13541450GPT-5.1
LMArena Text: longer queries13441448GPT-5.1
LMArena Text: writing and language13191428GPT-5.1
LMArena Text: entertainment and media13001415GPT-5.1
LMArena Vision: English11911252GPT-5.1
LMArena Vision: Chinese11861270GPT-5.1
LMArena Vision: reading text11881255GPT-5.1
LMArena Vision: humor11821263GPT-5.1
LMArena Vision: captioning11741252GPT-5.1
LMArena Vision: recognizing things11871232GPT-5.1
LMArena Vision: creative writing11821266GPT-5.1
LMArena DocumentNot measured1403Only GPT-5.1 measured
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 GPT-4.1 Mini and GPT-5.1
BenchmarkGPT-4.1 MiniGPT-5.1Leader
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

GPT-4.1 Mini$0.0012Fits in one request
GPT-5.1$0.0063Fits in one request

GPT-4.1 Mini costs less

Repository review

50K input + 3K output tokens

GPT-4.1 Mini$0.025Fits in one request
GPT-5.1$0.092Fits in one request

GPT-4.1 Mini costs less

Agent loop

200K input + 10K output tokens

GPT-4.1 Mini$0.096Fits in one request
GPT-5.1$0.350Fits in one request

GPT-4.1 Mini 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 GPT-4.1 Mini and GPT-5.1
SpecificationOpenAI GPT-4.1 MiniOpenAI GPT-5.1
MakerOpenAIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedApril 14, 2025November 13, 2025
Context window1.05M400K
Input $/Mtok$0.40$1.25
Output $/Mtok$1.60$10.00
Coding indexNot benchmarked40.4
Independent measurements behind it03
Cost per solved task$1.818$1.02
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4.1 Mini better than GPT-5.1 for coding?

Only GPT-5.1 has a coding score, 40.4 on the Vibe Coding Index; GPT-4.1 Mini has none, so the two cannot be ranked on coding. Pick GPT-4.1 Mini for output tokens 6.3x cheaper ($1.60 vs $10.00 per million) and a larger context window (1.05M against 400K tokens).

Which is cheaper, GPT-4.1 Mini or GPT-5.1?

GPT-4.1 Mini costs $0.40 per million input tokens and $1.60 per million output tokens; GPT-5.1 costs $1.25 and $10.00. Per solved SWE-bench Verified task, GPT-4.1 Mini costs $1.818 and GPT-5.1 $1.02.

Which has the bigger context window, GPT-4.1 Mini or GPT-5.1?

GPT-4.1 Mini, with 1.05M tokens against 400K.

How many benchmarks is the GPT-4.1 Mini vs GPT-5.1 comparison based on?

79 benchmarks have a result for both models as of October 22, 2026. GPT-4.1 Mini's coding index rests on 0 independent benchmarks and GPT-5.1's on 3. Where only one model has a result, the page says so instead of naming a winner.

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