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GPT-4.1 Mini vs GPT-5 Nano

GPT-5 Nano leads GPT-4.1 Mini on the Artificial Analysis Intelligence Index, 13.0 to 10.2, and GPT-5 Nano costs 4.0x less per output token ($0.40 vs $1.60 per million). Updated October 22, 2026; 79 benchmarks have a result for both.

Replace GPT-4.1 Mini Replace GPT-5 Nano
GPT-4.1 MiniOpenAI
Coding
No data
Overall
31.9
Output $/M
$1.60
42
GPT-5 NanoOpenAI
Coding
No data
Overall
35.6
Output $/M
$0.40
36
vs boards won of 79 shared, 1 tied

GPT-4.1 Mini or GPT-5 Nano: which to pick

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

Pick GPT-4.1 Mini for a larger context window (1.05M against 400K tokens) and work measured by SWE-bench Verified or LiveCodeBench (Vals AI), where it leads.

Model AGPT-4.1 MiniOpenAINot benchmarkedNo coding benchmark$1.818 per solved taskModel BGPT-5 NanoOpenAINot benchmarkedNo coding benchmark$0.109 per solved task
Shared results
79
GPT-4.1 Mini only
7
GPT-5 Nano only
8
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 Nano not benchmarked.
Widest category
Math, 17.9 points apart on average over 10 shared benchmarks.
Widest single gap
AA Math Index: GPT-4.1 Mini 46.3 against GPT-5 Nano 83.7, 37.4 points apart on a 0 to 100 scale.
Output price
GPT-4.1 Mini $1.60 against GPT-5 Nano $0.40 per million output tokens, 4.0x apart.
Context window
GPT-4.1 Mini takes 1.05M tokens, GPT-5 Nano 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 NanoTies
Coding25
Intelligence02
Agentic work11
Reasoning69
Math28
Knowledge92
Web design15
General2141 tie
All shared boards42361 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index25
Coding benchmarks for GPT-4.1 Mini and GPT-5 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
Aider polyglot32.4%Not measuredOnly GPT-4.1 Mini measured
SWE-bench Verified23.9%34.8%GPT-5 Nano
AA Coding Index20.2Not measuredOnly GPT-4.1 Mini measured
LiveCodeBench (Vals AI)58.2%70.2%GPT-5 Nano
LiveCodeBench (Artificial Analysis run)48.3%78.9%GPT-5 Nano
Terminal-Bench Hard (Artificial Analysis run)7.6%17.4%GPT-5 Nano
Terminal-BenchNot measured21.8%Only GPT-5 Nano measured
WeirdML37.6%38.1%GPT-5 Nano
LMArena Text: coding13671351GPT-4.1 Mini
LMArena Text: software and IT13601345GPT-4.1 Mini
Neither model has a result on the other 29 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4.1 Mini and GPT-5 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
AA Intelligence Index10.213.0GPT-5 Nano
Epoch Capabilities Index134.9139.2GPT-5 Nano
Agentic workLike-for-likePublic boards, shown as published, kept out of the index11
Agentic work benchmarks for GPT-4.1 Mini and GPT-5 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
τ²-Bench Telecom52.9%36.5%GPT-4.1 Mini
Berkeley Function Calling Leaderboard (BFCL)50.4%51.4%GPT-5 Nano
Neither model has a result on the other 39 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index69
Reasoning benchmarks for GPT-4.1 Mini and GPT-5 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
GPQA Diamond67.9%63.4%GPT-4.1 Mini
MMMU Pro (Vals AI)70.5%70.9%GPT-5 Nano
GPQA Diamond (Artificial Analysis run)66.4%67.6%GPT-5 Nano
Humanity's Last Exam (Artificial Analysis run)5.0%9.5%GPT-5 Nano
GPQA Diamond (Epoch AI run)65.8%69.4%GPT-5 Nano
ARC-AGI3.5%20.7%GPT-5 Nano
ARC-AGI-20.0%2.6%GPT-5 Nano
Chess puzzles1.0%22.0%GPT-5 Nano
Mystery game puzzles7.0%9.0%GPT-5 Nano
VPCTNot measured37.2%Only GPT-5 Nano measured
LMArena Text: hard prompts13491328GPT-4.1 Mini
LMArena Text: expert13381321GPT-4.1 Mini
LMArena Text: hard prompts in English13621338GPT-4.1 Mini
LMArena Vision: diagrams11821141GPT-4.1 Mini
LMArena Vision: homework12141157GPT-4.1 Mini
Kagi LLM Benchmark48.6%62.2%GPT-5 Nano
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index28
Math benchmarks for GPT-4.1 Mini and GPT-5 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
AIME49.4%81.2%GPT-5 Nano
MATH 500 (Vals AI)88.0%93.8%GPT-5 Nano
MGSM (Vals AI)87.8%89.3%GPT-5 Nano
AA Math Index46.383.7GPT-5 Nano
AIME 2025 (Artificial Analysis run)46.3%83.7%GPT-5 Nano
OTIS Mock AIME44.7%81.1%GPT-5 Nano
FrontierMath, tiers 1 to 36.7%20.0%GPT-5 Nano
FrontierMath, tier 4Not measured2.4%Only GPT-5 Nano measured
ProofBenchNot measured12.0%Only GPT-5 Nano measured
MATH level 587.3%95.2%GPT-5 Nano
LMArena Text: math13431317GPT-4.1 Mini
LMArena Text: mathematical work13471326GPT-4.1 Mini
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index92
Knowledge benchmarks for GPT-4.1 Mini and GPT-5 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
MMLU Pro77.2%76.1%GPT-4.1 Mini
LegalBench (Vals AI)78.0%50.1%GPT-4.1 Mini
CaseLaw (Vals AI)Not measured52.6%Only GPT-5 Nano measured
CorpFin (Vals AI)57.9%Not measuredOnly GPT-4.1 Mini measured
TaxEval (Vals AI)71.9%67.4%GPT-4.1 Mini
MortgageTax (Vals AI)65.5%53.6%GPT-4.1 Mini
MedQA (Vals AI)84.6%93.3%GPT-5 Nano
MedCode (Vals AI)Not measured30.4%Only GPT-5 Nano measured
MMLU Pro (Artificial Analysis run)78.1%78.0%GPT-4.1 Mini
SimpleQA Verified12.7%11.7%GPT-4.1 Mini
LMArena Text: science13281318GPT-4.1 Mini
LMArena Text: medicine and healthcare13241335GPT-5 Nano
LMArena Text: legal and government13431298GPT-4.1 Mini
LMArena Text: business and finance13221311GPT-4.1 Mini
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index15
Web design benchmarks for GPT-4.1 Mini and GPT-5 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
Design Arena: websites9971101GPT-5 Nano
Design Arena: UI components9581064GPT-5 Nano
Design Arena: game dev10701044GPT-4.1 Mini
Design Arena: data viz10341056GPT-5 Nano
Design Arena: 3D836965GPT-5 Nano
Design Arena: all code categories9931084GPT-5 Nano
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index214
General benchmarks for GPT-4.1 Mini and GPT-5 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
SAGE (Vals AI)Not measured30.4%Only GPT-5 Nano measured
MedScribe (Vals AI)Not measured72.9%Only GPT-5 Nano measured
IFBench38.3%67.6%GPT-5 Nano
Long context reasoning (AA-LCR)44.0%45.0%GPT-5 Nano
DTBench68.8%62.7%GPT-4.1 Mini
LMCA21.1%7.9%GPT-4.1 Mini
Fiction.LiveBench44.4%44.4%Tie
LMArena Text13411320GPT-4.1 Mini
LMArena Text: instruction following13331306GPT-4.1 Mini
LMArena Text: creative writing12991249GPT-4.1 Mini
LMArena Vision11811159GPT-4.1 Mini
LMArena Text: English13561321GPT-4.1 Mini
LMArena Text: non-English13181313GPT-4.1 Mini
LMArena Text: Chinese13291356GPT-5 Nano
LMArena Text: German13501327GPT-4.1 Mini
LMArena Text: Japanese12901227GPT-4.1 Mini
LMArena Text: Korean12981269GPT-4.1 Mini
LMArena Text: French1358Not measuredOnly GPT-4.1 Mini measured
LMArena Text: Spanish13191360GPT-5 Nano
LMArena Text: Russian13241296GPT-4.1 Mini
LMArena Text: Polish13261314GPT-4.1 Mini
LMArena Text: multi-turn13541311GPT-4.1 Mini
LMArena Text: longer queries13441312GPT-4.1 Mini
LMArena Text: writing and language13191283GPT-4.1 Mini
LMArena Text: entertainment and media13001268GPT-4.1 Mini
LMArena Vision: English11911170GPT-4.1 Mini
LMArena Vision: Chinese11861176GPT-4.1 Mini
LMArena Vision: reading text11881152GPT-4.1 Mini
LMArena Vision: humor11821110GPT-4.1 Mini
LMArena Vision: captioning1174Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: recognizing things1187Not measuredOnly GPT-4.1 Mini measured
LMArena Vision: creative writing1182Not measuredOnly GPT-4.1 Mini measured
Neither model has a result on the other 14 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 Nano
BenchmarkGPT-4.1 MiniGPT-5 NanoLeader
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 Nano$0.0003Fits in one request

GPT-5 Nano costs less

Repository review

50K input + 3K output tokens

GPT-4.1 Mini$0.025Fits in one request
GPT-5 Nano$0.0037Fits in one request

GPT-5 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-4.1 Mini$0.096Fits in one request
GPT-5 Nano$0.014Fits in one request

GPT-5 Nano 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 Nano
SpecificationOpenAI GPT-4.1 MiniOpenAI GPT-5 Nano
MakerOpenAIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedApril 14, 2025August 7, 2025
Context window1.05M400K
Input $/Mtok$0.40$0.05
Output $/Mtok$1.60$0.40
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved task$1.818$0.109
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4.1 Mini better than GPT-5 Nano for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GPT-4.1 Mini for a larger context window (1.05M against 400K tokens) and work measured by SWE-bench Verified or LiveCodeBench (Vals AI), where it leads.

Which is cheaper, GPT-4.1 Mini or GPT-5 Nano?

GPT-4.1 Mini costs $0.40 per million input tokens and $1.60 per million output tokens; GPT-5 Nano costs $0.05 and $0.40. Per solved SWE-bench Verified task, GPT-4.1 Mini costs $1.818 and GPT-5 Nano $0.109.

Which has the bigger context window, GPT-4.1 Mini or GPT-5 Nano?

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

How many benchmarks is the GPT-4.1 Mini vs GPT-5 Nano 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 Nano's on 0. Where only one model has a result, the page says so instead of naming a winner.

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