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GPT-5.4 Nano vs Inkling

GPT-5.4 Nano leads Inkling on coding, 44.8 to 31.5 on the Vibe Coding Index, and GPT-5.4 Nano costs 3.2x less per output token ($1.25 vs $4.05 per million). Updated October 22, 2026; 69 benchmarks have a result for both.

Replace GPT-5.4 Nano Replace Inkling
GPT-5.4 NanoOpenAI
Coding
44.8
Overall
45.7
Output $/M
$1.25
12
T InklingThinking Machines
Coding
31.5
Overall
46.5
Output $/M
$4.05
57
vs boards won of 69 shared

GPT-5.4 Nano or Inkling: which to pick

Pick GPT-5.4 Nano for coding: it scores 44.8 on the Vibe Coding Index against 31.5 for Inkling, though on 2 benchmarks against 6.

Pick Inkling for a larger context window (524K against 400K tokens) and work measured by LiveCodeBench (Vals AI) or SWE-bench Verified (Vals AI), where it leads.

Model AGPT-5.4 NanoOpenAI44.8/1002 independent benchmarks$0.14 per solved taskModel BInklingThinking Machines31.5/1006 independent benchmarks$0.76 per solved task
Shared results
69
GPT-5.4 Nano only
16
Inkling only
33
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 31.5 from 6 benchmarks.
Widest category
Reasoning, 13.6 points apart on average over 11 shared benchmarks.
Widest single gap
ARC-AGI-2: GPT-5.4 Nano 5.7% against Inkling 36.5%, 30.8 points apart on a 0 to 100 scale.
Output price
GPT-5.4 Nano $1.25 against Inkling $4.05 per million output tokens, 3.2x apart.
Context window
GPT-5.4 Nano takes 400K tokens, Inkling 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 NanoBarsInklingTies
Coding65
Intelligence02
Agentic work14
Reasoning110
Math33
Knowledge011
General122
All shared boards1257
CodingLike-for-likeSix of these boards feed the Vibe Coding Index65
Coding benchmarks for GPT-5.4 Nano and Inkling
BenchmarkGPT-5.4 NanoInklingLeader
LiveBench codingNot measured64.0%Only Inkling measured
LMArena WebDevNot measured1414Only Inkling measured
AA Coding Index56.152.1GPT-5.4 Nano
LiveCodeBench (Vals AI)84.0%85.5%Inkling
SWE-bench Verified (Vals AI)69.8%77.6%Inkling
Terminal-Bench 4 (Vals AI)Not measured0.5%Only Inkling measured
Vibe Code Bench (Vals AI)26.1%19.2%GPT-5.4 Nano
Code migration (Vals AI)14.5%11.8%GPT-5.4 Nano
ProgramBench (Vals AI)Not measured0.0%Only Inkling measured
IOI (Vals AI)Not measured14.9%Only Inkling measured
Terminal-Bench 2.1 (Vals AI)41.6%47.6%Inkling
Vibe Code Bench 1-100 (Vals AI)Not measured7.3%Only Inkling measured
SkillsBench (Vals AI)Not measured26.1%Only Inkling measured
CyberBench (Vals AI)Not measured66.8%Only Inkling measured
SciCode47.2%47.0%GPT-5.4 Nano
Terminal-Bench Hard (Artificial Analysis run)42.4%Not measuredOnly GPT-5.4 Nano measured
FrontierCodeNot measured14.0%Only Inkling measured
FrontierSWENot measured4.1%Only Inkling measured
WeirdML49.2%32.3%GPT-5.4 Nano
ALE-Bench1004.5946.0GPT-5.4 Nano
LMArena Text: coding14041466Inkling
LMArena Text: software and IT14021465Inkling
LMArena WebDev: ReactNot measured1404Only Inkling measured
LMArena WebDev: HTMLNot measured1399Only Inkling measured
Neither model has a result on the other 15 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5.4 Nano and Inkling
BenchmarkGPT-5.4 NanoInklingLeader
AA Intelligence Index20.725.0Inkling
Epoch Capabilities Index146.0148.4Inkling
Agentic workLike-for-likePublic boards, shown as published, kept out of the index14
Agentic work benchmarks for GPT-5.4 Nano and Inkling
BenchmarkGPT-5.4 NanoInklingLeader
AA Agentic Index16.022.5Inkling
Design Arena: agents building web appsNot measured1196Only Inkling measured
LiveBench researchNot measured59.9%Only Inkling measured
LiveBench browserNot measured16.0%Only Inkling measured
LiveBench long agenticNot measured14.1%Only Inkling measured
SREBench (Vals AI)Not measured0.0%Only Inkling measured
Finance Agent (Vals AI)38.2%46.6%Inkling
Tax Agent Bench (Vals AI)5.0%15.3%Inkling
Legal Research Bench (Vals AI)6.3%28.4%Inkling
Harvey's Legal Agent Benchmark (Vals AI)Not measured3.8%Only Inkling measured
Excel Modeling Benchmark (Vals AI)44.8%38.4%GPT-5.4 Nano
τ²-Bench Telecom76.0%Not measuredOnly GPT-5.4 Nano measured
APEX-AgentsNot measured33.8%Only Inkling measured
Neither model has a result on the other 28 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index110
Reasoning benchmarks for GPT-5.4 Nano and Inkling
BenchmarkGPT-5.4 NanoInklingLeader
GPQA Diamond77.5%87.1%Inkling
LiveBench reasoningNot measured78.3%Only Inkling measured
MMMU Pro (Vals AI)73.6%78.5%Inkling
GPQA Diamond (Artificial Analysis run)81.7%87.2%Inkling
Humanity's Last Exam (Artificial Analysis run)28.3%31.9%Inkling
GPQA Diamond (Epoch AI run)78.5%88.3%Inkling
ARC-AGI51.5%79.5%Inkling
ARC-AGI-25.7%36.5%Inkling
SimpleBenchNot measured50.0%Only Inkling measured
Chess puzzles45.0%21.0%GPT-5.4 Nano
Mystery game puzzles9.0%Not measuredOnly GPT-5.4 Nano measured
LMArena Text: hard prompts13811451Inkling
LMArena Text: expert13961466Inkling
LMArena Text: hard prompts in English13871448Inkling
LMArena Vision: diagrams1210Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: homework1225Not measuredOnly GPT-5.4 Nano measured
Kagi LLM Benchmark39.7%Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index33
Math benchmarks for GPT-5.4 Nano and Inkling
BenchmarkGPT-5.4 NanoInklingLeader
AIME88.8%Not measuredOnly GPT-5.4 Nano measured
OTIS Mock AIME87.8%88.9%Inkling
FrontierMath, tiers 1 to 344.9%33.3%GPT-5.4 Nano
FrontierMath, tier 412.2%4.9%GPT-5.4 Nano
ProofBench5.0%0.0%GPT-5.4 Nano
LMArena Text: math14051479Inkling
LMArena Text: mathematical work14091460Inkling
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index011
Knowledge benchmarks for GPT-5.4 Nano and Inkling
BenchmarkGPT-5.4 NanoInklingLeader
MMLU Pro77.2%86.3%Inkling
LegalBench (Vals AI)77.9%83.0%Inkling
CaseLaw (Vals AI)51.9%Not measuredOnly GPT-5.4 Nano measured
CorpFin (Vals AI)61.2%68.6%Inkling
TaxEval (Vals AI)67.4%75.3%Inkling
MortgageTax (Vals AI)59.1%64.0%Inkling
MedCode (Vals AI)41.0%41.2%Inkling
SimpleQA Verified11.7%40.3%Inkling
LMArena Text: science13741455Inkling
LMArena Text: medicine and healthcare13691447Inkling
LMArena Text: legal and government13681448Inkling
LMArena Text: business and finance13661438Inkling
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Web design benchmarks for GPT-5.4 Nano and Inkling
BenchmarkGPT-5.4 NanoInklingLeader
Design Arena: websitesNot measured1224Only Inkling measured
Design Arena: UI componentsNot measured1198Only Inkling measured
Design Arena: game devNot measured1165Only Inkling measured
Design Arena: data vizNot measured1156Only Inkling measured
Design Arena: 3DNot measured1160Only Inkling measured
Design Arena: all code categoriesNot measured1205Only Inkling measured
Design Arena: SVGNot measured1108Only Inkling measured
Design Arena: ASCII artNot measured1089Only Inkling measured
LiveBench designNot measured58.3%Only Inkling measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index122
General benchmarks for GPT-5.4 Nano and Inkling
BenchmarkGPT-5.4 NanoInklingLeader
Vals IndexNot measured29.0%Only Inkling measured
LiveBench data analysisNot measured72.8%Only Inkling measured
Public Benefits Bench (Vals AI)Not measured58.5%Only Inkling measured
SAGE (Vals AI)38.1%36.5%GPT-5.4 Nano
MedScribe (Vals AI)77.1%85.4%Inkling
Vals Multimodal Index47.6%49.4%Inkling
IFBench75.9%Not measuredOnly GPT-5.4 Nano measured
Long context reasoning (AA-LCR)76.7%77.3%Inkling
DTBench80.3%87.5%Inkling
LMCA36.9%37.6%Inkling
LMArena Text13721442Inkling
LMArena Text: instruction following13621425Inkling
LMArena Text: creative writing13151390Inkling
LMArena Vision1196Not measuredOnly GPT-5.4 Nano measured
LMArena Text: English13811442Inkling
LMArena Text: non-English13591434Inkling
LMArena Text: Chinese13911493Inkling
LMArena Text: German13681445Inkling
LMArena Text: Japanese13431429Inkling
LMArena Text: Korean13211403Inkling
LMArena Text: French13951455Inkling
LMArena Text: Spanish13711449Inkling
LMArena Text: Russian13631430Inkling
LMArena Text: Polish13661450Inkling
LMArena Text: multi-turn13821437Inkling
LMArena Text: longer queries13651435Inkling
LMArena Text: writing and language13381404Inkling
LMArena Text: entertainment and media13251394Inkling
LMArena Vision: English1202Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: Chinese1232Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: reading text1204Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: humor1161Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: recognizing things1141Not measuredOnly GPT-5.4 Nano measured
LMArena Vision: creative writing1159Not measuredOnly GPT-5.4 Nano measured
Neither model has a result on the other 12 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
BenchmarkGPT-5.4 NanoInklingLeader
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$0.0030Fits 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$0.061Fits 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$0.235Fits 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
SpecificationOpenAI GPT-5.4 NanoThinking Machines Inkling
MakerOpenAIThinking Machines
WeightsNo public weights listedOpen weights
ReleasedMarch 17, 2026July 17, 2026
Context window400K524K
Input $/Mtok$0.20$0.975
Output $/Mtok$1.25$4.05
Coding index44.831.5
Independent measurements behind it26
Cost per solved task$0.14$0.76
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5.4 Nano better than Inkling for coding?

Pick GPT-5.4 Nano for coding: it scores 44.8 on the Vibe Coding Index against 31.5 for Inkling, though on 2 benchmarks against 6. Pick Inkling for a larger context window (524K against 400K tokens) and work measured by LiveCodeBench (Vals AI) or SWE-bench Verified (Vals AI), where it leads.

Which is cheaper, GPT-5.4 Nano or Inkling?

GPT-5.4 Nano costs $0.20 per million input tokens and $1.25 per million output tokens; Inkling costs $0.975 and $4.05. Per solved SWE-bench Verified task, GPT-5.4 Nano costs $0.14 and Inkling $0.76.

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

Inkling, with 524K tokens against 400K.

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

69 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's on 6. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gpt-5-4-nano-vs-thinkingmachines-inkling">LLMBenchmark.ai, GPT-5.4 Nano vs Inkling</a></p>