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GPT-6.1 Sol vs Inkling Small

Updated October 21, 2026. 64 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace GPT-6.1 Sol Replace Inkling Small
GPT-6.1 SolOpenAI
Coding
88.7
Overall
51.8
Output $/M
$10.00
62
T Inkling SmallThinking Machines
Coding
29.9
Overall
25.7
Output $/M
$1.20
2
vs boards won of 64 shared

Decision reading

Pick GPT-6.1 Sol for coding: it scores 88.7 on the Vibe Coding Index against 29.9 for Inkling Small.

Pick Inkling Small when output tokens cost 8.3x less, or when what matters is CyberBench (Vals AI) or Public Benefits Bench (Vals AI), where it leads.

Model AGPT-6.1 SolOpenAI88.7/1002 independent benchmarksNo cost per solved taskModel BInkling SmallThinking Machines29.9/1001 independent benchmark$0.16 per solved task
Shared results
64
GPT-6.1 Sol only
31
Inkling Small only
20
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-6.1 Sol 88.7 from 2 benchmarks, Inkling Small 29.9 from 1 benchmark.
Widest category
Math, 41.7 points apart on average over 6 shared benchmarks.
Widest single gap
ProofBench: GPT-6.1 Sol 99.0% against Inkling Small 6.0%, 93.0 points apart on a 0 to 100 scale.
Output price
GPT-6.1 Sol $10.00 against Inkling Small $1.20 per million output tokens, 8.3x apart.
Context window
GPT-6.1 Sol 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-6.1 SolBarsInkling SmallTies
Coding121
Intelligence20
Agentic work50
Reasoning100
Math60
Knowledge60
General211
All shared boards622
CodingLike-for-likeFour of these boards feed the Vibe Coding Index121
Coding benchmarks for GPT-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling SmallLeader
LiveBench coding96.0%Not measuredOnly GPT-6.1 Sol measured
LMArena WebDev17531409GPT-6.1 Sol
AA Coding IndexNot measured52.9Only Inkling Small measured
LiveCodeBench (Vals AI)Not measured85.9%Only Inkling Small measured
SWE-bench Verified (Vals AI)Not measured82.2%Only Inkling Small measured
Terminal-Bench 4 (Vals AI)55.0%0.0%GPT-6.1 Sol
Vibe Code Bench (Vals AI)88.9%19.1%GPT-6.1 Sol
Code migration (Vals AI)65.1%13.7%GPT-6.1 Sol
ProgramBench (Vals AI)3.0%0.5%GPT-6.1 Sol
IOI (Vals AI)96.9%9.3%GPT-6.1 Sol
Terminal-Bench 2.1 (Vals AI)Not measured55.1%Only Inkling Small measured
SWE-bench Multimodal (Vals AI)43.5%Not measuredOnly GPT-6.1 Sol measured
SkillsBench (Vals AI)Not measured33.6%Only Inkling Small measured
CyberBench (Vals AI)39.3%64.1%Inkling Small
SciCode55.8%49.7%GPT-6.1 Sol
FrontierCode50.2%Not measuredOnly GPT-6.1 Sol measured
ALE-Bench2743.8Not measuredOnly GPT-6.1 Sol measured
LMArena Text: coding14781450GPT-6.1 Sol
LMArena Text: software and IT14761447GPT-6.1 Sol
LMArena WebDev: React17541399GPT-6.1 Sol
LMArena WebDev: HTML18001398GPT-6.1 Sol
LMArena WebDev: from an image17021410GPT-6.1 Sol
Neither model has a result on the other 16 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for GPT-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling SmallLeader
AA Intelligence Index51.825.7GPT-6.1 Sol
Epoch Capabilities Index168.4150.3GPT-6.1 Sol
Agentic workLike-for-likePublic boards, shown as published, kept out of the index50
Agentic work benchmarks for GPT-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling SmallLeader
AA Agentic IndexNot measured23.5Only Inkling Small measured
Design Arena: agents building mobile apps1190Not measuredOnly GPT-6.1 Sol measured
Design Arena: spreadsheets1250Not measuredOnly GPT-6.1 Sol measured
LiveBench research83.5%Not measuredOnly GPT-6.1 Sol measured
LiveBench browser88.0%Not measuredOnly GPT-6.1 Sol measured
LiveBench long agentic73.0%Not measuredOnly GPT-6.1 Sol measured
SREBench (Vals AI)50.8%Not measuredOnly GPT-6.1 Sol measured
Finance Agent (Vals AI)52.0%41.3%GPT-6.1 Sol
Tax Agent Bench (Vals AI)21.8%15.4%GPT-6.1 Sol
Legal Research Bench (Vals AI)38.5%25.5%GPT-6.1 Sol
Harvey's Legal Agent Benchmark (Vals AI)6.3%2.9%GPT-6.1 Sol
Excel Modeling Benchmark (Vals AI)70.8%31.8%GPT-6.1 Sol
BioMysteryBench (Vals AI)79.6%Not measuredOnly GPT-6.1 Sol measured
Terminal-Bench-Science (Vals AI)52.9%Not measuredOnly GPT-6.1 Sol measured
Vals Science Index59.6%Not measuredOnly GPT-6.1 Sol measured
Robo-bench (Vals AI)28.3%Not measuredOnly GPT-6.1 Sol measured
APEX-Agents60.0%Not measuredOnly GPT-6.1 Sol measured
SpireClimb24.7%Not measuredOnly GPT-6.1 Sol measured
Neither model has a result on the other 21 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index100
Reasoning benchmarks for GPT-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling SmallLeader
GPQA DiamondNot measured83.6%Only Inkling Small measured
LiveBench reasoning92.6%Not measuredOnly GPT-6.1 Sol measured
MysteryMechanism (Vals AI)46.4%Not measuredOnly GPT-6.1 Sol measured
GPQA Diamond (Artificial Analysis run)Not measured89.5%Only Inkling Small measured
Humanity's Last Exam (Artificial Analysis run)52.9%33.3%GPT-6.1 Sol
GPQA Diamond (Epoch AI run)95.4%88.5%GPT-6.1 Sol
ARC-AGI98.5%84.0%GPT-6.1 Sol
ARC-AGI-294.2%40.1%GPT-6.1 Sol
Chess puzzles68.0%Not measuredOnly GPT-6.1 Sol measured
Mystery game puzzles80.0%6.0%GPT-6.1 Sol
EBR-bench54.3%Not measuredOnly GPT-6.1 Sol measured
LMArena Text: hard prompts14631423GPT-6.1 Sol
LMArena Text: expert14891441GPT-6.1 Sol
LMArena Text: hard prompts in English14651429GPT-6.1 Sol
LMArena Vision: diagrams13061251GPT-6.1 Sol
LMArena Vision: homework13561257GPT-6.1 Sol
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for GPT-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling SmallLeader
OTIS Mock AIME100.0%90.0%GPT-6.1 Sol
FrontierMath, tiers 1 to 393.7%46.3%GPT-6.1 Sol
FrontierMath, tier 4100.0%17.1%GPT-6.1 Sol
ProofBench99.0%6.0%GPT-6.1 Sol
LMArena Text: math14891459GPT-6.1 Sol
LMArena Text: mathematical work15131441GPT-6.1 Sol
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index60
Knowledge benchmarks for GPT-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling SmallLeader
MMLU ProNot measured85.6%Only Inkling Small measured
LegalBench (Vals AI)Not measured83.0%Only Inkling Small measured
CorpFin (Vals AI)Not measured69.6%Only Inkling Small measured
TaxEval (Vals AI)Not measured75.5%Only Inkling Small measured
MortgageTax (Vals AI)Not measured62.3%Only Inkling Small measured
MedCode (Vals AI)48.8%37.9%GPT-6.1 Sol
SimpleQA Verified73.9%19.1%GPT-6.1 Sol
LMArena Text: science14441428GPT-6.1 Sol
LMArena Text: medicine and healthcare14331413GPT-6.1 Sol
LMArena Text: legal and government14711415GPT-6.1 Sol
LMArena Text: business and finance14451413GPT-6.1 Sol
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
Web design benchmarks for GPT-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling SmallLeader
Design Arena: websites1321Not measuredOnly GPT-6.1 Sol measured
Design Arena: UI components1321Not measuredOnly GPT-6.1 Sol measured
Design Arena: game dev1389Not measuredOnly GPT-6.1 Sol measured
Design Arena: data viz1278Not measuredOnly GPT-6.1 Sol measured
Design Arena: 3D1461Not measuredOnly GPT-6.1 Sol measured
Design Arena: all code categories1345Not measuredOnly GPT-6.1 Sol measured
LiveBench design82.1%Not measuredOnly GPT-6.1 Sol measured
Neither model has a result on the other 2 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index211
General benchmarks for GPT-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling SmallLeader
Vals Index63.9%27.6%GPT-6.1 Sol
LiveBench data analysis82.7%Not measuredOnly GPT-6.1 Sol measured
Public Benefits Bench (Vals AI)59.3%59.4%Inkling Small
SAGE (Vals AI)46.5%32.7%GPT-6.1 Sol
MedScribe (Vals AI)86.5%84.1%GPT-6.1 Sol
Vals Multimodal IndexNot measured50.0%Only Inkling Small measured
Long context reasoning (AA-LCR)84.0%75.7%GPT-6.1 Sol
DTBench96.5%Not measuredOnly GPT-6.1 Sol measured
LMCA62.8%Not measuredOnly GPT-6.1 Sol measured
Furniture assembly80.0%Not measuredOnly GPT-6.1 Sol measured
LMArena Text14431413GPT-6.1 Sol
LMArena Text: instruction following14661399GPT-6.1 Sol
LMArena Text: creative writing14251334GPT-6.1 Sol
LMArena Vision12881237GPT-6.1 Sol
LMArena Text: English14501421GPT-6.1 Sol
LMArena Text: non-English14331401GPT-6.1 Sol
LMArena Text: Chinese14871464GPT-6.1 Sol
LMArena Text: GermanNot measured1408Only Inkling Small measured
LMArena Text: JapaneseNot measured1401Only Inkling Small measured
LMArena Text: KoreanNot measured1367Only Inkling Small measured
LMArena Text: French14601435GPT-6.1 Sol
LMArena Text: Spanish14391422GPT-6.1 Sol
LMArena Text: Russian14571394GPT-6.1 Sol
LMArena Text: PolishNot measured1428Only Inkling Small measured
LMArena Text: multi-turn14421416GPT-6.1 Sol
LMArena Text: longer queries14581402GPT-6.1 Sol
LMArena Text: writing and language14441357GPT-6.1 Sol
LMArena Text: entertainment and media14261352GPT-6.1 Sol
LMArena Vision: English12741243GPT-6.1 Sol
LMArena Vision: ChineseNot measured1292Only Inkling Small measured
LMArena Vision: reading text12891243GPT-6.1 Sol
LMArena Vision: humorNot measured1207Only Inkling Small measured
LMArena Vision: creative writing13011205GPT-6.1 Sol
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-6.1 Sol and Inkling Small
BenchmarkGPT-6.1 SolInkling 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-6.1 Sol$0.0070Fits in one request
Inkling Small$0.0010Fits in one request

Inkling Small costs less

Repository review

50K input + 3K output tokens

GPT-6.1 Sol$0.130Fits in one request
Inkling Small$0.026Fits in one request

Inkling Small costs less

Agent loop

200K input + 10K output tokens

GPT-6.1 Sol$0.500Fits 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-6.1 Sol and Inkling Small
SpecificationOpenAI GPT-6.1 SolThinking Machines Inkling Small
MakerOpenAIThinking Machines
WeightsNo public weights listedOpen weights
ReleasedSeptember 29, 2026July 30, 2026
Context window1.05M524K
Input $/Mtok$2.00$0.45
Output $/Mtok$10.00$1.20
Coding index88.729.9
Independent measurements behind it21
Cost per solved taskNot computable$0.16
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-6.1 Sol better than Inkling Small for coding?

Pick GPT-6.1 Sol for coding: it scores 88.7 on the Vibe Coding Index against 29.9 for Inkling Small. Pick Inkling Small when output tokens cost 8.3x less, or when what matters is CyberBench (Vals AI) or Public Benefits Bench (Vals AI), where it leads.

Which is cheaper, GPT-6.1 Sol or Inkling Small?

GPT-6.1 Sol costs $2.00 per million input tokens and $10.00 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-6.1 Sol or Inkling Small?

GPT-6.1 Sol, with 1.05M tokens against 524K.

How many benchmarks is the GPT-6.1 Sol vs Inkling Small comparison based on?

64 benchmarks have a result for both models as of October 21, 2026. GPT-6.1 Sol's coding index rests on 2 independent benchmarks and Inkling Small's on 1. Where only one model has a result, the page says so instead of naming a winner.

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