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GPT-5.4 Nano vs Inkling Small

GPT-5.4 Nano leads Inkling Small on coding, 44.8 to 27.3 on the Vibe Coding Index, at about the same output price ($1.25 vs $1.20 per million). Updated October 22, 2026; 72 benchmarks have a result for both.

Replace GPT-5.4 Nano Replace Inkling Small
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
8
T Inkling SmallThinking Machines
Coding
27.3
Overall
43.6
Output $/M
$1.20
64
vs boards won of 72 shared

GPT-5.4 Nano or Inkling Small: which to pick

Pick GPT-5.4 Nano for coding: it scores 44.8 on the Vibe Coding Index against 27.3 for Inkling Small, though on 2 benchmarks against 4.

Pick Inkling Small for output tokens 1.0x cheaper ($1.20 vs $1.25 per million) and a larger context window (524K against 400K tokens).

Model AGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved taskModel BInkling SmallThinking Machines27.3/1004 independent benchmarks$0.16 per solved task
Shared results
72
GPT-5.4 Nano only
13
Inkling Small only
12
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
GPT-5.4 Nano 44.8 from 2 benchmarks, Inkling Small 27.3 from 4 benchmarks.
Widest category
Reasoning, 11.1 points apart on average over 12 shared benchmarks.
Widest single gap
ARC-AGI-2: GPT-5.4 Nano 5.7% against Inkling Small 40.1%, 34.4 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Nano $1.25 against Inkling Small $1.20 per million output tokens, 1.0x apart.
Context window
GPT-5.4 Nano takes 400K 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-5.4 NanoBarsInkling SmallTies
Coding36
Intelligence02
Agentic work14
Reasoning111
Math06
Knowledge110
General225
All shared boards864
CodingLike-for-likeSix of these boards feed the Vibe Coding Index36
Coding benchmarks for GPT-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 NanoInkling SmallLeader
LMArena WebDevNot measured1409Only Inkling Small measured
AA Coding Index56.152.9GPT-5.4 Nano
LiveCodeBench (Vals AI)84.0%85.9%Inkling Small
SWE-bench Verified (Vals AI)69.8%82.2%Inkling Small
Terminal-Bench 4 (Vals AI)Not measured0.0%Only Inkling Small measured
Vibe Code Bench (Vals AI)26.1%19.1%GPT-5.4 Nano
Code migration (Vals AI)14.5%13.7%GPT-5.4 Nano
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)41.6%55.1%Inkling Small
SkillsBench (Vals AI)Not measured33.6%Only Inkling Small measured
CyberBench (Vals AI)Not measured64.1%Only Inkling Small measured
SciCode47.2%49.7%Inkling Small
Terminal-Bench Hard (Artificial Analysis run)42.4%Not measuredOnly GPT-5.4 Nano measured
WeirdML49.2%Not measuredOnly GPT-5.4 Nano measured
ALE-Bench1004.5Not measuredOnly GPT-5.4 Nano measured
LMArena Text: coding14041450Inkling Small
LMArena Text: software and IT14021447Inkling 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 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 NanoInkling SmallLeader
AA Intelligence Index20.725.7Inkling Small
Epoch Capabilities Index146.0150.3Inkling Small
Agentic workLike-for-likePublic boards, shown as published, kept out of the index14
Agentic work benchmarks for GPT-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 NanoInkling SmallLeader
AA Agentic Index16.023.5Inkling Small
Finance Agent (Vals AI)38.2%41.3%Inkling Small
Tax Agent Bench (Vals AI)5.0%15.4%Inkling Small
Legal Research Bench (Vals AI)6.3%25.5%Inkling Small
Harvey's Legal Agent Benchmark (Vals AI)Not measured2.9%Only Inkling Small measured
Excel Modeling Benchmark (Vals AI)44.8%31.8%GPT-5.4 Nano
τ²-Bench Telecom76.0%Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index111
Reasoning benchmarks for GPT-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 NanoInkling SmallLeader
GPQA Diamond77.5%83.6%Inkling Small
MMMU Pro (Vals AI)73.6%Not measuredOnly GPT-5.4 Nano measured
GPQA Diamond (Artificial Analysis run)81.7%89.5%Inkling Small
Humanity's Last Exam (Artificial Analysis run)28.3%33.3%Inkling Small
GPQA Diamond (Epoch AI run)78.5%88.5%Inkling Small
ARC-AGI51.5%84.0%Inkling Small
ARC-AGI-25.7%40.1%Inkling Small
Chess puzzles45.0%Not measuredOnly GPT-5.4 Nano measured
Mystery game puzzles9.0%6.0%GPT-5.4 Nano
LMArena Text: hard prompts13811423Inkling Small
LMArena Text: expert13961441Inkling Small
LMArena Text: hard prompts in English13871429Inkling Small
LMArena Vision: diagrams12101251Inkling Small
LMArena Vision: homework12251257Inkling Small
Kagi LLM Benchmark39.7%Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index06
Math benchmarks for GPT-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 NanoInkling SmallLeader
AIME88.8%Not measuredOnly GPT-5.4 Nano measured
OTIS Mock AIME87.8%90.0%Inkling Small
FrontierMath, tiers 1 to 344.9%46.3%Inkling Small
FrontierMath, tier 412.2%17.1%Inkling Small
ProofBench5.0%6.0%Inkling Small
LMArena Text: math14051459Inkling Small
LMArena Text: mathematical work14091441Inkling Small
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index110
Knowledge benchmarks for GPT-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 NanoInkling SmallLeader
MMLU Pro77.2%85.6%Inkling Small
LegalBench (Vals AI)77.9%83.0%Inkling Small
CaseLaw (Vals AI)51.9%Not measuredOnly GPT-5.4 Nano measured
CorpFin (Vals AI)61.2%69.6%Inkling Small
TaxEval (Vals AI)67.4%75.5%Inkling Small
MortgageTax (Vals AI)59.1%62.3%Inkling Small
MedCode (Vals AI)41.0%37.9%GPT-5.4 Nano
SimpleQA Verified11.7%19.1%Inkling Small
LMArena Text: science13741428Inkling Small
LMArena Text: medicine and healthcare13691413Inkling Small
LMArena Text: legal and government13681415Inkling Small
LMArena Text: business and finance13661413Inkling Small
Neither model has a result on the other 6 boards here
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Web design benchmarks for GPT-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 NanoInkling SmallLeader
Neither model has a result on 9 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index225
General benchmarks for GPT-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 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)38.1%32.7%GPT-5.4 Nano
MedScribe (Vals AI)77.1%84.1%Inkling Small
Vals Multimodal Index47.6%50.0%Inkling Small
IFBench75.9%Not measuredOnly GPT-5.4 Nano measured
Long context reasoning (AA-LCR)76.7%75.7%GPT-5.4 Nano
DTBench80.3%Not measuredOnly GPT-5.4 Nano measured
LMCA36.9%Not measuredOnly GPT-5.4 Nano measured
LMArena Text13721413Inkling Small
LMArena Text: instruction following13621399Inkling Small
LMArena Text: creative writing13151334Inkling Small
LMArena Vision11961237Inkling Small
LMArena Text: English13811421Inkling Small
LMArena Text: non-English13591401Inkling Small
LMArena Text: Chinese13911464Inkling Small
LMArena Text: German13681408Inkling Small
LMArena Text: Japanese13431401Inkling Small
LMArena Text: Korean13211367Inkling Small
LMArena Text: French13951435Inkling Small
LMArena Text: Spanish13711422Inkling Small
LMArena Text: Russian13631394Inkling Small
LMArena Text: Polish13661428Inkling Small
LMArena Text: multi-turn13821416Inkling Small
LMArena Text: longer queries13651402Inkling Small
LMArena Text: writing and language13381357Inkling Small
LMArena Text: entertainment and media13251352Inkling Small
LMArena Vision: English12021243Inkling Small
LMArena Vision: Chinese12321292Inkling Small
LMArena Vision: reading text12041243Inkling Small
LMArena Vision: humor11611207Inkling Small
LMArena Vision: recognizing things1141Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: creative writing11591205Inkling Small
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-5.4 Nano and Inkling Small
BenchmarkGPT-5.4 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-5.4 Nano$0.0008Fits in one request
Inkling Small$0.0010Fits in one request

GPT-5.4 Nano costs less

Repository review

50K input + 3K output tokens

GPT-5.4 Nano$0.014Fits in one request
Inkling Small$0.026Fits in one request

GPT-5.4 Nano costs less

Agent loop

200K input + 10K output tokens

GPT-5.4 Nano$0.052Fits in one request
Inkling Small$0.102Fits in one request

GPT-5.4 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-5.4 Nano and Inkling Small
SpecificationOpenAI GPT-5.4 NanoThinking Machines Inkling Small
MakerOpenAIThinking Machines
WeightsNo public weights listedOpen weights
ReleasedMarch 17, 2026July 30, 2026
Context window400K524K
Input $/Mtok$0.20$0.45
Output $/Mtok$1.25$1.20
Coding index44.827.3
Independent measurements behind it24
Cost per solved task$0.14$0.16
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Nano better than Inkling Small for coding?

Pick GPT-5.4 Nano for coding: it scores 44.8 on the Vibe Coding Index against 27.3 for Inkling Small, though on 2 benchmarks against 4. Pick Inkling Small for output tokens 1.0x cheaper ($1.20 vs $1.25 per million) and a larger context window (524K against 400K tokens).

Which is cheaper, GPT-5.4 Nano or Inkling Small?

GPT-5.4 Nano costs $0.20 per million input tokens and $1.25 per million output tokens; Inkling Small costs $0.45 and $1.20. Per solved SWE-bench Verified task, GPT-5.4 Nano costs $0.14 and Inkling Small $0.16.

Which has the bigger context window, GPT-5.4 Nano or Inkling Small?

Inkling Small, with 524K tokens against 400K.

How many benchmarks is the GPT-5.4 Nano vs Inkling Small comparison based on?

72 benchmarks have a result for both models as of October 22, 2026. GPT-5.4 Nano's coding index rests on 2 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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