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GPT-4.1 Nano vs Inkling Small

Inkling Small leads GPT-4.1 Nano on the Artificial Analysis Intelligence Index, 25.7 to 7.8, and GPT-4.1 Nano costs 3.0x less per output token ($0.40 vs $1.20 per million). Updated October 22, 2026; 44 benchmarks have a result for both.

Replace GPT-4.1 Nano Replace Inkling Small
GPT-4.1 NanoOpenAI
Coding
No data
Overall
24.7
Output $/M
$0.40
0
T Inkling SmallThinking Machines
Coding
27.3
Overall
43.6
Output $/M
$1.20
44
vs boards won of 44 shared

GPT-4.1 Nano or Inkling Small: which to pick

Only Inkling Small has a coding score, 27.3 on the Vibe Coding Index; GPT-4.1 Nano has none, so the two cannot be ranked on coding.

Pick GPT-4.1 Nano for output tokens 3.0x cheaper ($0.40 vs $1.20 per million) and a larger context window (1.05M against 524K tokens).

Model AGPT-4.1 NanoOpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BInkling SmallThinking Machines27.3/1004 independent benchmarks$0.16 per solved task
Shared results
44
GPT-4.1 Nano only
27
Inkling Small only
40
Like-for-like categories
6 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 Nano not benchmarked, Inkling Small 27.3 from 4 benchmarks.
Widest category
Math, 39.9 points apart on average over 3 shared benchmarks.
Widest single gap
ARC-AGI: GPT-4.1 Nano 0.0% against Inkling Small 84.0%, 84.0 points apart on a 0 to 100 scale.
Output price
GPT-4.1 Nano $0.40 against Inkling Small $1.20 per million output tokens, 3.0x apart.
Context window
GPT-4.1 Nano takes 1.05M tokens, Inkling Small 524K.

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 NanoBarsInkling SmallTies
Coding04
Intelligence02
Reasoning09
Math03
Knowledge010
General016
All shared boards044
CodingLike-for-likeSix of these boards feed the Vibe Coding Index04
Coding benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
Aider polyglot8.9%Not measuredOnly GPT-4.1 Nano measured
LMArena WebDevNot measured1409Only Inkling Small measured
AA Coding Index11.152.9Inkling Small
LiveCodeBench (Vals AI)42.7%85.9%Inkling Small
SWE-bench Verified (Vals AI)Not measured82.2%Only Inkling Small measured
Terminal-Bench 4 (Vals AI)Not measured0.0%Only Inkling Small measured
Vibe Code Bench (Vals AI)Not measured19.1%Only Inkling Small measured
Code migration (Vals AI)Not measured13.7%Only Inkling Small measured
ProgramBench (Vals AI)Not measured0.5%Only Inkling Small measured
IOI (Vals AI)Not measured9.3%Only Inkling Small measured
Terminal-Bench 2.1 (Vals AI)Not measured55.1%Only Inkling Small measured
SkillsBench (Vals AI)Not measured33.6%Only Inkling Small measured
CyberBench (Vals AI)Not measured64.1%Only Inkling Small measured
LiveCodeBench (Artificial Analysis run)32.6%Not measuredOnly GPT-4.1 Nano measured
SciCodeNot measured49.7%Only Inkling Small measured
Terminal-Bench Hard (Artificial Analysis run)3.8%Not measuredOnly GPT-4.1 Nano measured
WeirdML19.0%Not measuredOnly GPT-4.1 Nano measured
LMArena Text: coding13061450Inkling Small
LMArena Text: software and IT13051447Inkling Small
LMArena WebDev: ReactNot measured1399Only Inkling Small measured
LMArena WebDev: HTMLNot measured1398Only Inkling Small measured
LMArena WebDev: from an imageNot measured1410Only Inkling Small measured
Neither model has a result on the other 17 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
AA Intelligence Index7.825.7Inkling Small
Epoch Capabilities Index129.5150.3Inkling Small
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Agentic work benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
AA Agentic IndexNot measured23.5Only Inkling Small measured
Finance Agent (Vals AI)Not measured41.3%Only Inkling Small measured
Tax Agent Bench (Vals AI)Not measured15.4%Only Inkling Small measured
Legal Research Bench (Vals AI)Not measured25.5%Only Inkling Small measured
Harvey's Legal Agent Benchmark (Vals AI)Not measured2.9%Only Inkling Small measured
Excel Modeling Benchmark (Vals AI)Not measured31.8%Only Inkling Small measured
τ²-Bench Telecom17.3%Not measuredOnly GPT-4.1 Nano measured
Berkeley Function Calling Leaderboard (BFCL)33.1%Not measuredOnly GPT-4.1 Nano measured
Neither model has a result on the other 33 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index09
Reasoning benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
GPQA Diamond50.8%83.6%Inkling Small
MMMU Pro (Vals AI)55.0%Not measuredOnly GPT-4.1 Nano measured
GPQA Diamond (Artificial Analysis run)51.2%89.5%Inkling Small
Humanity's Last Exam (Artificial Analysis run)3.8%33.3%Inkling Small
GPQA Diamond (Epoch AI run)48.9%88.5%Inkling Small
ARC-AGI0.0%84.0%Inkling Small
ARC-AGI-20.0%40.1%Inkling Small
Chess puzzles0.0%Not measuredOnly GPT-4.1 Nano measured
Mystery game puzzlesNot measured6.0%Only Inkling Small measured
LMArena Text: hard prompts12861423Inkling Small
LMArena Text: expert12711441Inkling Small
LMArena Text: hard prompts in English12931429Inkling Small
LMArena Vision: diagramsNot measured1251Only Inkling Small measured
LMArena Vision: homeworkNot measured1257Only Inkling Small measured
Kagi LLM Benchmark33.3%Not measuredOnly GPT-4.1 Nano measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index03
Math benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
AIME26.5%Not measuredOnly GPT-4.1 Nano measured
MATH 500 (Vals AI)80.2%Not measuredOnly GPT-4.1 Nano measured
MGSM (Vals AI)69.3%Not measuredOnly GPT-4.1 Nano measured
AA Math Index24.0Not measuredOnly GPT-4.1 Nano measured
AIME 2025 (Artificial Analysis run)24.0%Not measuredOnly GPT-4.1 Nano measured
OTIS Mock AIME28.9%90.0%Inkling Small
FrontierMath, tiers 1 to 3Not measured46.3%Only Inkling Small measured
FrontierMath, tier 4Not measured17.1%Only Inkling Small measured
ProofBenchNot measured6.0%Only Inkling Small measured
MATH level 570.0%Not measuredOnly GPT-4.1 Nano measured
LMArena Text: math12741459Inkling Small
LMArena Text: mathematical work12741441Inkling Small
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index010
Knowledge benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
MMLU Pro63.5%85.6%Inkling Small
LegalBench (Vals AI)61.1%83.0%Inkling Small
CorpFin (Vals AI)42.1%69.6%Inkling Small
TaxEval (Vals AI)60.8%75.5%Inkling Small
MortgageTax (Vals AI)52.8%62.3%Inkling Small
MedQA (Vals AI)68.2%Not measuredOnly GPT-4.1 Nano measured
MedCode (Vals AI)Not measured37.9%Only Inkling Small measured
MMLU Pro (Artificial Analysis run)65.7%Not measuredOnly GPT-4.1 Nano measured
SimpleQA Verified6.0%19.1%Inkling Small
LMArena Text: science12971428Inkling Small
LMArena Text: medicine and healthcare12761413Inkling Small
LMArena Text: legal and government13001415Inkling Small
LMArena Text: business and finance12671413Inkling Small
Neither model has a result on the other 5 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
Design Arena: websites972Not measuredOnly GPT-4.1 Nano measured
Design Arena: UI components913Not measuredOnly GPT-4.1 Nano measured
Design Arena: game dev970Not measuredOnly GPT-4.1 Nano measured
Design Arena: data viz891Not measuredOnly GPT-4.1 Nano measured
Design Arena: 3D924Not measuredOnly GPT-4.1 Nano measured
Design Arena: all code categories962Not measuredOnly GPT-4.1 Nano measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index016
General benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
Vals IndexNot measured27.6%Only Inkling Small measured
Public Benefits Bench (Vals AI)Not measured59.4%Only Inkling Small measured
SAGE (Vals AI)Not measured32.7%Only Inkling Small measured
MedScribe (Vals AI)Not measured84.1%Only Inkling Small measured
Vals Multimodal IndexNot measured50.0%Only Inkling Small measured
IFBench32.0%Not measuredOnly GPT-4.1 Nano measured
Long context reasoning (AA-LCR)20.3%75.7%Inkling Small
DTBench52.5%Not measuredOnly GPT-4.1 Nano measured
LMCA5.5%Not measuredOnly GPT-4.1 Nano measured
Fiction.LiveBench25.0%Not measuredOnly GPT-4.1 Nano measured
LMArena Text12851413Inkling Small
LMArena Text: instruction following12661399Inkling Small
LMArena Text: creative writing12601334Inkling Small
LMArena Vision10631237Inkling Small
LMArena Text: English13031421Inkling Small
LMArena Text: non-English12601401Inkling Small
LMArena Text: Chinese12701464Inkling Small
LMArena Text: German12881408Inkling Small
LMArena Text: Japanese11981401Inkling Small
LMArena Text: KoreanNot measured1367Only Inkling Small measured
LMArena Text: FrenchNot measured1435Only Inkling Small measured
LMArena Text: SpanishNot measured1422Only Inkling Small measured
LMArena Text: Russian12611394Inkling Small
LMArena Text: PolishNot measured1428Only Inkling Small measured
LMArena Text: multi-turn12771416Inkling Small
LMArena Text: longer queries12831402Inkling Small
LMArena Text: writing and language12611357Inkling Small
LMArena Text: entertainment and media12431352Inkling Small
LMArena Vision: English11011243Inkling Small
LMArena Vision: ChineseNot measured1292Only Inkling Small measured
LMArena Vision: reading textNot measured1243Only Inkling Small measured
LMArena Vision: humorNot measured1207Only Inkling Small measured
LMArena Vision: creative writingNot measured1205Only Inkling Small measured
Neither model has a result on the other 13 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-4.1 Nano and Inkling Small
BenchmarkGPT-4.1 NanoInkling SmallLeader
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 Nano$0.0003Fits in one request
Inkling Small$0.0010Fits in one request

GPT-4.1 Nano costs less

Repository review

50K input + 3K output tokens

GPT-4.1 Nano$0.0062Fits in one request
Inkling Small$0.026Fits in one request

GPT-4.1 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-4.1 Nano$0.024Fits in one request
Inkling Small$0.102Fits in one request

GPT-4.1 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 Nano and Inkling Small
SpecificationOpenAI GPT-4.1 NanoThinking Machines Inkling Small
MakerOpenAIThinking Machines
WeightsNo public weights listedOpen weights
ReleasedApril 14, 2025July 30, 2026
Context window1.05M524K
Input $/Mtok$0.10$0.45
Output $/Mtok$0.40$1.20
Coding indexNot benchmarked27.3
Independent measurements behind it04
Cost per solved taskNot computable$0.16
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4.1 Nano better than Inkling Small for coding?

Only Inkling Small has a coding score, 27.3 on the Vibe Coding Index; GPT-4.1 Nano has none, so the two cannot be ranked on coding. Pick GPT-4.1 Nano for output tokens 3.0x cheaper ($0.40 vs $1.20 per million) and a larger context window (1.05M against 524K tokens).

Which is cheaper, GPT-4.1 Nano or Inkling Small?

GPT-4.1 Nano costs $0.10 per million input tokens and $0.40 per million output tokens; Inkling Small costs $0.45 and $1.20. Cost per solved task is known for Inkling Small only.

Which has the bigger context window, GPT-4.1 Nano or Inkling Small?

GPT-4.1 Nano, with 1.05M tokens against 524K.

How many benchmarks is the GPT-4.1 Nano vs Inkling Small comparison based on?

44 benchmarks have a result for both models as of October 22, 2026. GPT-4.1 Nano's coding index rests on 0 independent benchmarks and Inkling Small's on 4. Where only one model has a result, the page says so instead of naming a winner.

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