Enter opens the highlighted result. Esc closes.

GPT-5 vs Inkling Small

GPT-5 leads Inkling Small on coding, 38.8 to 27.3 on the Vibe Coding Index, and Inkling Small costs 8.3x less per output token ($1.20 vs $10.00 per million). Updated October 22, 2026; 65 benchmarks have a result for both.

Replace GPT-5 Replace Inkling Small
GPT-5OpenAI
Coding
38.8
Overall
51.5
Output $/M
$10.00
30
T Inkling SmallThinking Machines
Coding
27.3
Overall
43.6
Output $/M
$1.20
35
vs boards won of 65 shared

GPT-5 or Inkling Small: which to pick

Pick GPT-5 for coding: it scores 38.8 on the Vibe Coding Index against 27.3 for Inkling Small, though on 3 benchmarks against 4.

Pick Inkling Small for output tokens 8.3x cheaper ($1.20 vs $10.00 per million) and a lower cost per solved task ($0.16 against $0.39).

Model AGPT-5OpenAI38.8/1003 independent benchmarks$0.39 per solved taskModel BInkling SmallThinking Machines27.3/1004 independent benchmarks$0.16 per solved task
Shared results
65
GPT-5 only
48
Inkling Small only
19
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-5 38.8 from 3 benchmarks, Inkling Small 27.3 from 4 benchmarks.
Widest category
Reasoning, 7.4 points apart on average over 12 shared benchmarks.
Widest single gap
SimpleQA Verified: GPT-5 50.1% against Inkling Small 19.1%, 31.0 points apart on a 0 to 100 scale.
Output price
GPT-5 $10.00 against Inkling Small $1.20 per million output tokens, 8.3x apart.
Context window
GPT-5 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-5BarsInkling SmallTies
Coding35
Intelligence02
Reasoning48
Math42
Knowledge65
General1313
All shared boards3035
CodingLike-for-likeSix of these boards feed the Vibe Coding Index35
Coding benchmarks for GPT-5 and Inkling Small
BenchmarkGPT-5Inkling SmallLeader
Aider polyglot88.0%Not measuredOnly GPT-5 measured
SWE-bench Verified74.4%Not measuredOnly GPT-5 measured
LMArena WebDev14181409GPT-5
AA Coding Index37.852.9Inkling Small
LiveCodeBench (Vals AI)85.9%85.9%Inkling Small
SWE-bench Verified (Vals AI)69.0%82.2%Inkling Small
Terminal-Bench 4 (Vals AI)Not measured0.0%Only Inkling Small measured
Vibe Code Bench (Vals AI)20.1%19.1%GPT-5
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)84.6%Not measuredOnly GPT-5 measured
SciCodeNot measured49.7%Only Inkling Small measured
Terminal-Bench Hard (Artificial Analysis run)37.9%Not measuredOnly GPT-5 measured
Terminal-Bench49.6%Not measuredOnly GPT-5 measured
GSO-Bench6.9%Not measuredOnly GPT-5 measured
WeirdML60.7%Not measuredOnly GPT-5 measured
ALE-Bench807.6Not measuredOnly GPT-5 measured
LMArena Text: coding14361450Inkling Small
LMArena Text: software and IT14201447Inkling Small
LMArena WebDev: ReactNot measured1399Only Inkling Small measured
LMArena WebDev: HTML14271398GPT-5
LMArena WebDev: from an imageNot measured1410Only Inkling Small measured
SciCode0.0%Not measuredOnly GPT-5 measured
Neither model has a result on the other 12 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for GPT-5 and Inkling Small
BenchmarkGPT-5Inkling SmallLeader
AA Intelligence Index23.025.7Inkling Small
Epoch Capabilities Index150.0150.3Inkling Small
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index13 boards, none shared
Agentic work benchmarks for GPT-5 and Inkling Small
BenchmarkGPT-5Inkling 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 Telecom86.5%Not measuredOnly GPT-5 measured
METR time horizons69.6%Not measuredOnly GPT-5 measured
Remote Labor Index1.7%Not measuredOnly GPT-5 measured
GDPval34.8%Not measuredOnly GPT-5 measured
BALROG32.8%Not measuredOnly GPT-5 measured
DeepResearch Bench49.6%Not measuredOnly GPT-5 measured
BrowseComp-Plus80.0%Not measuredOnly GPT-5 measured
Neither model has a result on the other 28 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index48
Reasoning benchmarks for GPT-5 and Inkling Small
BenchmarkGPT-5Inkling SmallLeader
GPQA Diamond85.6%83.6%GPT-5
MMMU Pro (Vals AI)81.5%Not measuredOnly GPT-5 measured
GPQA Diamond (Artificial Analysis run)85.4%89.5%Inkling Small
Humanity's Last Exam (Artificial Analysis run)28.5%33.3%Inkling Small
GPQA Diamond (Epoch AI run)86.2%88.5%Inkling Small
ARC-AGI65.7%84.0%Inkling Small
ARC-AGI-29.9%40.1%Inkling Small
SimpleBench56.7%Not measuredOnly GPT-5 measured
Chess puzzles36.0%Not measuredOnly GPT-5 measured
Mystery game puzzles23.0%6.0%GPT-5
EBR-bench12.7%Not measuredOnly GPT-5 measured
VPCT66.0%Not measuredOnly GPT-5 measured
LMArena Text: hard prompts14151423Inkling Small
LMArena Text: expert14191441Inkling Small
LMArena Text: hard prompts in English14191429Inkling Small
LMArena Vision: diagrams12521251GPT-5
LMArena Vision: homework12781257GPT-5
Kagi LLM Benchmark72.7%Not measuredOnly GPT-5 measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index42
Math benchmarks for GPT-5 and Inkling Small
BenchmarkGPT-5Inkling SmallLeader
AIME93.4%Not measuredOnly GPT-5 measured
MATH 500 (Vals AI)96.0%Not measuredOnly GPT-5 measured
MGSM (Vals AI)92.8%Not measuredOnly GPT-5 measured
AA Math Index94.3Not measuredOnly GPT-5 measured
AIME 2025 (Artificial Analysis run)94.3%Not measuredOnly GPT-5 measured
OTIS Mock AIME91.4%90.0%GPT-5
FrontierMath, tiers 1 to 355.4%46.3%GPT-5
FrontierMath, tier 422.0%17.1%GPT-5
ProofBench18.0%6.0%GPT-5
MATH level 598.1%Not measuredOnly GPT-5 measured
LMArena Text: math14071459Inkling Small
LMArena Text: mathematical work14051441Inkling Small
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index65
Knowledge benchmarks for GPT-5 and Inkling Small
BenchmarkGPT-5Inkling SmallLeader
MMLU Pro86.5%85.6%GPT-5
LegalBench (Vals AI)86.0%83.0%GPT-5
CaseLaw (Vals AI)66.5%Not measuredOnly GPT-5 measured
CorpFin (Vals AI)61.1%69.6%Inkling Small
TaxEval (Vals AI)73.4%75.5%Inkling Small
MortgageTax (Vals AI)65.5%62.3%GPT-5
MedQA (Vals AI)96.3%Not measuredOnly GPT-5 measured
MedCode (Vals AI)49.6%37.9%GPT-5
MMLU Pro (Artificial Analysis run)87.1%Not measuredOnly GPT-5 measured
SimpleQA Verified50.1%19.1%GPT-5
GeoBench81.0%Not measuredOnly GPT-5 measured
LMArena Text: science14161428Inkling Small
LMArena Text: medicine and healthcare14131413Inkling Small
LMArena Text: legal and government14311415GPT-5
LMArena Text: business and finance14001413Inkling Small
FACTS Benchmark Suite56.5%Not measuredOnly GPT-5 measured
Neither model has a result on the other 2 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for GPT-5 and Inkling Small
BenchmarkGPT-5Inkling SmallLeader
Design Arena: websites1184Not measuredOnly GPT-5 measured
Design Arena: UI components1177Not measuredOnly GPT-5 measured
Design Arena: game dev1185Not measuredOnly GPT-5 measured
Design Arena: data viz1221Not measuredOnly GPT-5 measured
Design Arena: 3D1055Not measuredOnly GPT-5 measured
Design Arena: all code categories1167Not measuredOnly GPT-5 measured
Design Arena: SVG1188Not measuredOnly GPT-5 measured
Design Arena: ASCII art1141Not measuredOnly GPT-5 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index1313
General benchmarks for GPT-5 and Inkling Small
BenchmarkGPT-5Inkling SmallLeader
Vals IndexNot measured27.6%Only Inkling Small measured
Public Benefits Bench (Vals AI)Not measured59.4%Only Inkling Small measured
SAGE (Vals AI)43.7%32.7%GPT-5
MedScribe (Vals AI)83.7%84.1%Inkling Small
Vals Multimodal IndexNot measured50.0%Only Inkling Small measured
IFBench73.1%Not measuredOnly GPT-5 measured
Long context reasoning (AA-LCR)78.2%75.7%GPT-5
DTBench90.7%Not measuredOnly GPT-5 measured
LMCA40.0%Not measuredOnly GPT-5 measured
Fiction.LiveBench97.2%Not measuredOnly GPT-5 measured
Creative writing (Lech Mazur)86.0%Not measuredOnly GPT-5 measured
LMArena Text14061413Inkling Small
LMArena Text: instruction following13881399Inkling Small
LMArena Text: creative writing13651334GPT-5
LMArena Vision12321237Inkling Small
LMArena Text: English14091421Inkling Small
LMArena Text: non-English13971401Inkling Small
LMArena Text: Chinese14221464Inkling Small
LMArena Text: German14161408GPT-5
LMArena Text: Japanese14091401GPT-5
LMArena Text: Korean13601367Inkling Small
LMArena Text: French14091435Inkling Small
LMArena Text: Spanish13991422Inkling Small
LMArena Text: Russian14071394GPT-5
LMArena Text: Polish14311428GPT-5
LMArena Text: multi-turn14261416GPT-5
LMArena Text: longer queries13991402Inkling Small
LMArena Text: writing and language13841357GPT-5
LMArena Text: entertainment and media13791352GPT-5
LMArena Vision: English12311243Inkling Small
LMArena Vision: Chinese12671292Inkling Small
LMArena Vision: reading text12461243GPT-5
LMArena Vision: humor12191207GPT-5
LMArena Vision: captioning1212Not measuredOnly GPT-5 measured
LMArena Vision: recognizing things1263Not measuredOnly GPT-5 measured
LMArena Vision: creative writing12101205GPT-5
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-5 and Inkling Small
BenchmarkGPT-5Inkling 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$0.0063Fits in one request
Inkling Small$0.0010Fits in one request

Inkling Small costs less

Repository review

50K input + 3K output tokens

GPT-5$0.092Fits in one request
Inkling Small$0.026Fits in one request

Inkling Small costs less

Agent loop

200K input + 10K output tokens

GPT-5$0.350Fits in one request
Inkling Small$0.102Fits in one request

Inkling Small 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 and Inkling Small
SpecificationOpenAI GPT-5Thinking Machines Inkling Small
MakerOpenAIThinking Machines
WeightsNo public weights listedOpen weights
ReleasedAugust 7, 2025July 30, 2026
Context window400K524K
Input $/Mtok$1.25$0.45
Output $/Mtok$10.00$1.20
Coding index38.827.3
Independent measurements behind it34
Cost per solved task$0.39$0.16
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5 better than Inkling Small for coding?

Pick GPT-5 for coding: it scores 38.8 on the Vibe Coding Index against 27.3 for Inkling Small, though on 3 benchmarks against 4. Pick Inkling Small for output tokens 8.3x cheaper ($1.20 vs $10.00 per million) and a lower cost per solved task ($0.16 against $0.39).

Which is cheaper, GPT-5 or Inkling Small?

GPT-5 costs $1.25 per million input tokens and $10.00 per million output tokens; Inkling Small costs $0.45 and $1.20. Per solved SWE-bench Verified task, GPT-5 costs $0.39 and Inkling Small $0.16.

Which has the bigger context window, GPT-5 or Inkling Small?

Inkling Small, with 524K tokens against 400K.

How many benchmarks is the GPT-5 vs Inkling Small comparison based on?

65 benchmarks have a result for both models as of October 22, 2026. GPT-5's coding index rests on 3 independent benchmarks and Inkling Small's on 4. Where only one model has a result, the page says so instead of naming a winner.

Compare next

Embed this comparison on your site

Free under CC BY 4.0, while the source link stays visible. Preview the frame · Terms and other embeds

<iframe src="https://llmbenchmark.ai/embed/compare/gpt-5-vs-thinkingmachines-inkling-small" title="GPT-5 vs Inkling Small, 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-5-vs-thinkingmachines-inkling-small">LLMBenchmark.ai, GPT-5 vs Inkling Small</a></p>