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GPT-4.1 vs Inkling

Updated October 21, 2026. 59 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace GPT-4.1 Replace Inkling
GPT-4.1OpenAI
Coding
46.5
Overall
12.7
Output $/M
$8.00
3
T InklingThinking Machines
Coding
49.7
Overall
25.0
Output $/M
$4.05
56
vs boards won of 59 shared

Decision reading

Pick Inkling for coding: it scores 49.7 on the Vibe Coding Index against 46.5 for GPT-4.1.

Pick GPT-4.1 when a solved task costs $0.37 against $0.76, or when the context window is larger, 1.05M against 524K tokens.

Model AGPT-4.1OpenAI46.5/1002 independent benchmarks$0.37 per solved taskModel BInklingThinking Machines49.7/1002 independent benchmarks$0.76 per solved task
Shared results
59
GPT-4.1 only
28
Inkling only
43
Like-for-like categories
7 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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 46.5 from 2 benchmarks, Inkling 49.7 from 2 benchmarks.
Widest category
Math, 28.2 points apart on average over 4 shared benchmarks.
Widest single gap
ARC-AGI: GPT-4.1 5.5% against Inkling 79.5%, 74.0 points apart on a 0 to 100 scale.
Output price
GPT-4.1 $8.00 against Inkling $4.05 per million output tokens, 2.0x apart.
Context window
GPT-4.1 takes 1.05M 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-4.1BarsInklingTies
Coding14
Intelligence02
Reasoning012
Math04
Knowledge28
Web design06
General020
All shared boards356
CodingLike-for-likeFour of these boards feed the Vibe Coding Index14
Coding benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
Aider polyglot52.4%Not measuredOnly GPT-4.1 measured
SWE-bench Verified39.6%Not measuredOnly GPT-4.1 measured
SWE-bench Multimodal31.1%Not measuredOnly GPT-4.1 measured
LiveBench codingNot measured64.0%Only Inkling measured
LMArena WebDevNot measured1414Only Inkling measured
AA Coding IndexNot measured52.1Only Inkling measured
LiveCodeBench (Vals AI)54.7%85.5%Inkling
SWE-bench Verified (Vals AI)Not measured77.6%Only Inkling measured
Terminal-Bench 4 (Vals AI)Not measured0.5%Only Inkling measured
Vibe Code Bench (Vals AI)Not measured19.2%Only Inkling measured
Code migration (Vals AI)Not measured11.8%Only Inkling measured
ProgramBench (Vals AI)Not measured0.0%Only Inkling measured
IOI (Vals AI)Not measured14.9%Only Inkling measured
Terminal-Bench 2.1 (Vals AI)Not measured47.6%Only Inkling measured
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
LiveCodeBench (Artificial Analysis run)45.7%Not measuredOnly GPT-4.1 measured
SciCodeNot measured47.0%Only Inkling measured
Terminal-Bench Hard (Artificial Analysis run)13.6%Not measuredOnly GPT-4.1 measured
FrontierCodeNot measured14.0%Only Inkling measured
FrontierSWENot measured4.1%Only Inkling measured
WeirdML39.0%32.3%GPT-4.1
ALE-Bench558.1946.0Inkling
LMArena Text: coding13901466Inkling
LMArena Text: software and IT13911465Inkling
LMArena WebDev: ReactNot measured1404Only Inkling measured
LMArena WebDev: HTMLNot measured1399Only Inkling measured
Neither model has a result on the other 10 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
AA Intelligence Index12.725.0Inkling
Epoch Capabilities Index136.7148.4Inkling
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index13 boards, none shared
Agentic work benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
AA Agentic IndexNot measured22.5Only Inkling measured
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)Not measured46.6%Only Inkling measured
Tax Agent Bench (Vals AI)Not measured15.3%Only Inkling measured
Legal Research Bench (Vals AI)Not measured28.4%Only Inkling measured
Harvey's Legal Agent Benchmark (Vals AI)Not measured3.8%Only Inkling measured
Excel Modeling Benchmark (Vals AI)Not measured38.4%Only Inkling measured
τ²-Bench Telecom47.1%Not measuredOnly GPT-4.1 measured
APEX-AgentsNot measured33.8%Only Inkling measured
Neither model has a result on the other 26 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index012
Reasoning benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
GPQA Diamond65.4%87.1%Inkling
LiveBench reasoningNot measured78.3%Only Inkling measured
MMMU Pro (Vals AI)72.4%78.5%Inkling
GPQA Diamond (Artificial Analysis run)66.6%87.2%Inkling
Humanity's Last Exam (Artificial Analysis run)4.2%31.9%Inkling
GPQA Diamond (Epoch AI run)66.9%88.3%Inkling
ARC-AGI5.5%79.5%Inkling
ARC-AGI-20.4%36.5%Inkling
SimpleBench27.0%50.0%Inkling
Chess puzzles3.0%21.0%Inkling
LMArena Text: hard prompts13841451Inkling
LMArena Text: expert13641466Inkling
LMArena Text: hard prompts in English13931448Inkling
LMArena Vision: diagrams1215Not measuredOnly GPT-4.1 measured
LMArena Vision: homework1248Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index04
Math benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
AIME39.6%Not measuredOnly GPT-4.1 measured
MATH 500 (Vals AI)87.2%Not measuredOnly GPT-4.1 measured
MGSM (Vals AI)87.7%Not measuredOnly GPT-4.1 measured
AA Math Index34.7Not measuredOnly GPT-4.1 measured
AIME 2025 (Artificial Analysis run)34.7%Not measuredOnly GPT-4.1 measured
OTIS Mock AIME38.3%88.9%Inkling
FrontierMath, tiers 1 to 36.0%33.3%Inkling
FrontierMath, tier 4Not measured4.9%Only Inkling measured
ProofBenchNot measured0.0%Only Inkling measured
MATH level 583.0%Not measuredOnly GPT-4.1 measured
LMArena Text: math13691479Inkling
LMArena Text: mathematical work13601460Inkling
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index28
Knowledge benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
MMLU Pro80.5%86.3%Inkling
LegalBench (Vals AI)83.1%83.0%GPT-4.1
CaseLaw (Vals AI)69.9%Not measuredOnly GPT-4.1 measured
CorpFin (Vals AI)63.0%68.6%Inkling
TaxEval (Vals AI)75.1%75.3%Inkling
MortgageTax (Vals AI)65.9%64.0%GPT-4.1
MedQA (Vals AI)91.2%Not measuredOnly GPT-4.1 measured
MedCode (Vals AI)Not measured41.2%Only Inkling measured
MMLU Pro (Artificial Analysis run)80.6%Not measuredOnly GPT-4.1 measured
SimpleQA Verified31.1%40.3%Inkling
GeoBench72.0%Not measuredOnly GPT-4.1 measured
LMArena Text: science13821455Inkling
LMArena Text: medicine and healthcare13791447Inkling
LMArena Text: legal and government13991448Inkling
LMArena Text: business and finance13691438Inkling
Neither model has a result on the other 2 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
Design Arena: websites10391224Inkling
Design Arena: UI components10001200Inkling
Design Arena: game dev10801166Inkling
Design Arena: data viz11041160Inkling
Design Arena: 3D8501161Inkling
Design Arena: all code categories10261206Inkling
Design Arena: SVGNot measured1109Only 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 index020
General benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
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)Not measured36.5%Only Inkling measured
MedScribe (Vals AI)Not measured85.4%Only Inkling measured
Vals Multimodal IndexNot measured49.4%Only Inkling measured
IFBench43.0%Not measuredOnly GPT-4.1 measured
Long context reasoning (AA-LCR)68.3%77.3%Inkling
DTBench68.3%87.5%Inkling
LMCA25.6%37.6%Inkling
Fiction.LiveBench63.9%Not measuredOnly GPT-4.1 measured
LMArena Text13831442Inkling
LMArena Text: instruction following13671425Inkling
LMArena Text: creative writing13631390Inkling
LMArena Vision1210Not measuredOnly GPT-4.1 measured
LMArena Text: English13921442Inkling
LMArena Text: non-English13701434Inkling
LMArena Text: Chinese13821493Inkling
LMArena Text: German13811445Inkling
LMArena Text: Japanese13191429Inkling
LMArena Text: Korean13381403Inkling
LMArena Text: French13821455Inkling
LMArena Text: Spanish13761449Inkling
LMArena Text: Russian13771430Inkling
LMArena Text: Polish13891450Inkling
LMArena Text: multi-turn13971437Inkling
LMArena Text: longer queries13851435Inkling
LMArena Text: writing and language13711404Inkling
LMArena Text: entertainment and media13651394Inkling
LMArena Vision: English1209Not measuredOnly GPT-4.1 measured
LMArena Vision: Chinese1226Not measuredOnly GPT-4.1 measured
LMArena Vision: reading text1218Not measuredOnly GPT-4.1 measured
LMArena Vision: humor1196Not measuredOnly GPT-4.1 measured
LMArena Vision: captioning1207Not measuredOnly GPT-4.1 measured
LMArena Vision: recognizing things1208Not measuredOnly GPT-4.1 measured
LMArena Vision: creative writing1210Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 10 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-4.1 and Inkling
BenchmarkGPT-4.1InklingLeader
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$0.0060Fits in one request
Inkling$0.0030Fits in one request

Inkling costs less

Repository review

50K input + 3K output tokens

GPT-4.1$0.124Fits in one request
Inkling$0.062Fits in one request

Inkling costs less

Agent loop

200K input + 10K output tokens

GPT-4.1$0.480Fits in one request
Inkling$0.240Fits in one request

Inkling 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 and Inkling
SpecificationOpenAI GPT-4.1Thinking Machines Inkling
MakerOpenAIThinking Machines
WeightsNo public weights listedOpen weights
ReleasedApril 14, 2025July 17, 2026
Context window1.05M524K
Input $/Mtok$2.00$1.00
Output $/Mtok$8.00$4.05
Coding index46.549.7
Independent measurements behind it22
Cost per solved task$0.37$0.76
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4.1 better than Inkling for coding?

Pick Inkling for coding: it scores 49.7 on the Vibe Coding Index against 46.5 for GPT-4.1. Pick GPT-4.1 when a solved task costs $0.37 against $0.76, or when the context window is larger, 1.05M against 524K tokens.

Which is cheaper, GPT-4.1 or Inkling?

GPT-4.1 costs $2.00 per million input tokens and $8.00 per million output tokens; Inkling costs $1.00 and $4.05. Per solved SWE-bench Verified task, GPT-4.1 costs $0.37 and Inkling $0.76.

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

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

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

59 benchmarks have a result for both models as of October 21, 2026. GPT-4.1's coding index rests on 2 independent benchmarks and Inkling's on 2. Where only one model has a result, the page says so instead of naming a winner.

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<iframe src="https://llmbenchmark.ai/embed/compare/gpt-4-1-vs-thinkingmachines-inkling" title="GPT-4.1 vs Inkling, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/gpt-4-1-vs-thinkingmachines-inkling">LLMBenchmark.ai, GPT-4.1 vs Inkling</a></p>