Gemini 3.1 Pro Preview vs Inkling Small

Gemini 3.1 Pro Preview leads Inkling Small on coding, 32.3 to 27.3 on the Vibe Coding Index, and Inkling Small costs 10.0x less per output token ($1.20 vs $12.00 per million). Updated October 22, 2026; 79 benchmarks have a result for both.

Replace Gemini 3.1 Pro Preview Replace Inkling Small

Gemini 3.1 Pro PreviewGoogle

Coding: 32.3
Overall: 54.0
Output $/M: $12.00

T Inkling SmallThinking Machines

Coding: 27.3
Overall: 43.6
Output $/M: $1.20

vs boards won of 79 shared

Gemini 3.1 Pro Preview or Inkling Small: which to pick

Pick Gemini 3.1 Pro Preview for coding: it scores 32.3 on the Vibe Coding Index against 27.3 for Inkling Small.

Pick Inkling Small for output tokens 10.0x cheaper ($1.20 vs $12.00 per million) and a lower cost per solved task ($0.16 against $0.99).

Model AGemini 3.1 Pro PreviewGoogle32.3/1004 independent benchmarks$0.99 per solved task Model BInkling SmallThinking Machines27.3/1004 independent benchmarks$0.16 per solved task

79545

Shared results: 79
Gemini 3.1 Pro Preview only: 54
Inkling Small only: 5
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.

Coding
Vibe Coding Index, six public coding benchmarks
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview scores 32.3 against 27.3.
4 benchmarks behind each score
Intelligence
AA Intelligence Index
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 29.7 against 25.7.
Same board, both measured
Agentic work
AA Agentic Index
Inkling Small
Inkling Small leads, 23.5 against 8.2.
Same board, both measured
Reasoning
GPQA Diamond
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 95.5% against 83.6%.
Same board, both measured
Math
AIME
No call
Only Gemini 3.1 Pro Preview has a AIME result, 98.1%.
Directional only
Knowledge
MMLU Pro
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview leads, 91.0% against 85.6%.
Same board, both measured
Web design
Design Arena: websites
No call
Only Gemini 3.1 Pro Preview has a Design Arena: websites result, 1233.
Directional only
General
Vals Index
No call
Only Inkling Small has a Vals Index result, 27.6%.
Directional only
Long documents
Listed context window
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview takes 1.05M tokens against 524K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Inkling Small
Gemini 3.1 Pro Preview $0.0080, Inkling Small $0.0010 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Inkling Small
Gemini 3.1 Pro Preview $0.99, Inkling Small $0.16.
Published attempt cost and pass rate

At a glance

Coding index: Gemini 3.1 Pro Preview 32.3 from 4 benchmarks, Inkling Small 27.3 from 4 benchmarks.
Widest category: Reasoning, 13.4 points apart on average over 12 shared benchmarks.
Widest single gap: SimpleQA Verified: Gemini 3.1 Pro Preview 73.5% against Inkling Small 19.1%, 54.4 points apart on a 0 to 100 scale.
Output price: Gemini 3.1 Pro Preview $12.00 against Inkling Small $1.20 per million output tokens, 10.0x apart.
Context window: Gemini 3.1 Pro Preview 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
Category	Gemini 3.1 Pro Preview	Inkling Small
Coding	14	2
Intelligence	1	0
Agentic work	2	3
Reasoning	12	0
Math	6	0
Knowledge	9	2
General	26	2
All shared boards	70	9

CodingLike-for-likeSix of these boards feed the Vibe Coding Index142

Coding benchmarks for Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
LMArena WebDev	1447	1409	Gemini 3.1 Pro Preview
AA Coding Index	68.8	52.9	Gemini 3.1 Pro Preview
LiveCodeBench (Vals AI)	88.5%	85.9%	Gemini 3.1 Pro Preview
SWE-bench Verified (Vals AI)	78.8%	82.2%	Inkling Small
Terminal-Bench 4 (Vals AI)	2.5%	0.0%	Gemini 3.1 Pro Preview
Vibe Code Bench (Vals AI)	32.0%	19.1%	Gemini 3.1 Pro Preview
Code migration (Vals AI)	17.3%	13.7%	Gemini 3.1 Pro Preview
ProgramBench (Vals AI)	0.0%	0.5%	Inkling Small
IOI (Vals AI)	51.8%	9.3%	Gemini 3.1 Pro Preview
Terminal-Bench 2.1 (Vals AI)	70.8%	55.1%	Gemini 3.1 Pro Preview
Vibe Code Bench 1-100 (Vals AI)	6.7%	Not measured	Only Gemini 3.1 Pro Preview measured
SkillsBench (Vals AI)	Not measured	33.6%	Only Inkling Small measured
CyberBench (Vals AI)	Not measured	64.1%	Only Inkling Small measured
SciCode	58.7%	49.7%	Gemini 3.1 Pro Preview
Terminal-Bench Hard (Artificial Analysis run)	53.8%	Not measured	Only Gemini 3.1 Pro Preview measured
Terminal-Bench	80.2%	Not measured	Only Gemini 3.1 Pro Preview measured
GSO-Bench	22.6%	Not measured	Only Gemini 3.1 Pro Preview measured
WeirdML	72.1%	Not measured	Only Gemini 3.1 Pro Preview measured
MirrorCode	8.9%	Not measured	Only Gemini 3.1 Pro Preview measured
ALE-Bench	1160.6	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Text: coding	1484	1450	Gemini 3.1 Pro Preview
LMArena Text: software and IT	1487	1447	Gemini 3.1 Pro Preview
LMArena WebDev: React	1438	1399	Gemini 3.1 Pro Preview
LMArena WebDev: HTML	1490	1398	Gemini 3.1 Pro Preview
LMArena WebDev: from an image	1481	1410	Gemini 3.1 Pro Preview
SciCode	14.3%	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 13 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10

Intelligence benchmarks for Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
AA Intelligence Index	29.7	25.7	Gemini 3.1 Pro Preview
Epoch Capabilities Index	Not measured	150.3	Only Inkling Small measured

Agentic workLike-for-likePublic boards, shown as published, kept out of the index23

Agentic work benchmarks for Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
AA Agentic Index	8.2	23.5	Inkling Small
Design Arena: agents building web apps	1125	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building full-stack apps	1068	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building mobile apps	1094	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building Android apps	1049	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building Godot games	1236	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: agents building games	1113	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: HTML slides	1103	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: PowerPoint slides	1041	Not measured	Only Gemini 3.1 Pro Preview measured
SREBench (Vals AI)	0.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Finance Agent (Vals AI)	43.0%	41.3%	Gemini 3.1 Pro Preview
Tax Agent Bench (Vals AI)	9.3%	15.4%	Inkling Small
Legal Research Bench (Vals AI)	20.7%	25.5%	Inkling Small
Harvey's Legal Agent Benchmark (Vals AI)	Not measured	2.9%	Only Inkling Small measured
Excel Modeling Benchmark (Vals AI)	52.6%	31.8%	Gemini 3.1 Pro Preview
BioMysteryBench (Vals AI)	60.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Terminal-Bench-Science (Vals AI)	1.4%	Not measured	Only Gemini 3.1 Pro Preview measured
Vals Science Index	27.4%	Not measured	Only Gemini 3.1 Pro Preview measured
τ²-Bench Telecom	95.6%	Not measured	Only Gemini 3.1 Pro Preview measured
APEX-Agents	35.1%	Not measured	Only Gemini 3.1 Pro Preview measured
METR time horizons	77.0%	Not measured	Only Gemini 3.1 Pro Preview measured
BALROG	57.0%	Not measured	Only Gemini 3.1 Pro Preview measured
DeepResearch Bench	47.8%	Not measured	Only Gemini 3.1 Pro Preview measured
PostTrainBench	22.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Vending-Bench 2	$911	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 16 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index120

Reasoning benchmarks for Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
GPQA Diamond	95.5%	83.6%	Gemini 3.1 Pro Preview
MysteryMechanism (Vals AI)	20.7%	Not measured	Only Gemini 3.1 Pro Preview measured
MMMU Pro (Vals AI)	88.2%	Not measured	Only Gemini 3.1 Pro Preview measured
GPQA Diamond (Artificial Analysis run)	94.1%	89.5%	Gemini 3.1 Pro Preview
Humanity's Last Exam (Artificial Analysis run)	47.0%	33.3%	Gemini 3.1 Pro Preview
GPQA Diamond (Epoch AI run)	94.4%	88.5%	Gemini 3.1 Pro Preview
ARC-AGI	98.0%	84.0%	Gemini 3.1 Pro Preview
ARC-AGI-2	77.1%	40.1%	Gemini 3.1 Pro Preview
SimpleBench	79.6%	Not measured	Only Gemini 3.1 Pro Preview measured
Chess puzzles	51.0%	Not measured	Only Gemini 3.1 Pro Preview measured
Mystery game puzzles	34.0%	6.0%	Gemini 3.1 Pro Preview
EBR-bench	14.3%	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Text: hard prompts	1485	1423	Gemini 3.1 Pro Preview
LMArena Text: expert	1483	1441	Gemini 3.1 Pro Preview
LMArena Text: hard prompts in English	1480	1429	Gemini 3.1 Pro Preview
LMArena Vision: diagrams	1311	1251	Gemini 3.1 Pro Preview
LMArena Vision: homework	1316	1257	Gemini 3.1 Pro Preview
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 Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
AIME	98.1%	Not measured	Only Gemini 3.1 Pro Preview measured
OTIS Mock AIME	95.6%	90.0%	Gemini 3.1 Pro Preview
FrontierMath, tiers 1 to 3	59.6%	46.3%	Gemini 3.1 Pro Preview
FrontierMath, tier 4	26.8%	17.1%	Gemini 3.1 Pro Preview
ProofBench	26.0%	6.0%	Gemini 3.1 Pro Preview
LMArena Text: math	1486	1459	Gemini 3.1 Pro Preview
LMArena Text: mathematical work	1478	1441	Gemini 3.1 Pro Preview
Neither model has a result on the other 6 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index92

Knowledge benchmarks for Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
MMLU Pro	91.0%	85.6%	Gemini 3.1 Pro Preview
LegalBench (Vals AI)	87.4%	83.0%	Gemini 3.1 Pro Preview
CaseLaw (Vals AI)	64.8%	Not measured	Only Gemini 3.1 Pro Preview measured
CorpFin (Vals AI)	64.5%	69.6%	Inkling Small
TaxEval (Vals AI)	72.9%	75.5%	Inkling Small
MortgageTax (Vals AI)	69.4%	62.3%	Gemini 3.1 Pro Preview
MedQA (Vals AI)	96.4%	Not measured	Only Gemini 3.1 Pro Preview measured
MedCode (Vals AI)	59.1%	37.9%	Gemini 3.1 Pro Preview
SimpleQA Verified	73.5%	19.1%	Gemini 3.1 Pro Preview
LMArena Text: science	1497	1428	Gemini 3.1 Pro Preview
LMArena Text: medicine and healthcare	1486	1413	Gemini 3.1 Pro Preview
LMArena Text: legal and government	1487	1415	Gemini 3.1 Pro Preview
LMArena Text: business and finance	1459	1413	Gemini 3.1 Pro Preview
FACTS Benchmark Suite	67.4%	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 4 boards here

Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared

Web design benchmarks for Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
Design Arena: websites	1233	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: UI components	1224	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: game dev	1202	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: data viz	1209	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: 3D	1234	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: all code categories	1231	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: SVG	1285	Not measured	Only Gemini 3.1 Pro Preview measured
Design Arena: ASCII art	1270	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 1 board here

GeneralLike-for-likePublic boards, shown as published, kept out of the index262

General benchmarks for Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
Vals Index	Not measured	27.6%	Only Inkling Small measured
Public Benefits Bench (Vals AI)	53.8%	59.4%	Inkling Small
SAGE (Vals AI)	48.7%	32.7%	Gemini 3.1 Pro Preview
MedScribe (Vals AI)	76.1%	84.1%	Inkling Small
Vals Multimodal Index	56.1%	50.0%	Gemini 3.1 Pro Preview
IFBench	77.1%	Not measured	Only Gemini 3.1 Pro Preview measured
Long context reasoning (AA-LCR)	82.0%	75.7%	Gemini 3.1 Pro Preview
DTBench	97.1%	Not measured	Only Gemini 3.1 Pro Preview measured
LMCA	53.8%	Not measured	Only Gemini 3.1 Pro Preview measured
CL-bench	20.8%	Not measured	Only Gemini 3.1 Pro Preview measured
Furniture assembly	26.7%	Not measured	Only Gemini 3.1 Pro Preview measured
ExploitBench	26.1%	Not measured	Only Gemini 3.1 Pro Preview measured
CL-bench Life	16.9%	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Text	1480	1413	Gemini 3.1 Pro Preview
LMArena Text: instruction following	1466	1399	Gemini 3.1 Pro Preview
LMArena Text: creative writing	1482	1334	Gemini 3.1 Pro Preview
LMArena Vision	1296	1237	Gemini 3.1 Pro Preview
LMArena Text: English	1478	1421	Gemini 3.1 Pro Preview
LMArena Text: non-English	1476	1401	Gemini 3.1 Pro Preview
LMArena Text: Chinese	1527	1464	Gemini 3.1 Pro Preview
LMArena Text: German	1490	1408	Gemini 3.1 Pro Preview
LMArena Text: Japanese	1491	1401	Gemini 3.1 Pro Preview
LMArena Text: Korean	1455	1367	Gemini 3.1 Pro Preview
LMArena Text: French	1487	1435	Gemini 3.1 Pro Preview
LMArena Text: Spanish	1481	1422	Gemini 3.1 Pro Preview
LMArena Text: Russian	1497	1394	Gemini 3.1 Pro Preview
LMArena Text: Polish	1498	1428	Gemini 3.1 Pro Preview
LMArena Text: multi-turn	1487	1416	Gemini 3.1 Pro Preview
LMArena Text: longer queries	1482	1402	Gemini 3.1 Pro Preview
LMArena Text: writing and language	1481	1357	Gemini 3.1 Pro Preview
LMArena Text: entertainment and media	1465	1352	Gemini 3.1 Pro Preview
LMArena Vision: English	1287	1243	Gemini 3.1 Pro Preview
LMArena Vision: Chinese	1364	1292	Gemini 3.1 Pro Preview
LMArena Vision: reading text	1304	1243	Gemini 3.1 Pro Preview
LMArena Vision: humor	1322	1207	Gemini 3.1 Pro Preview
LMArena Vision: captioning	1345	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Vision: recognizing things	1330	Not measured	Only Gemini 3.1 Pro Preview measured
LMArena Vision: creative writing	1324	1205	Gemini 3.1 Pro Preview
LMArena Document	1444	Not measured	Only Gemini 3.1 Pro Preview measured
Neither model has a result on the other 7 boards here

Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared

Image generation benchmarks for Gemini 3.1 Pro Preview and Inkling Small
Benchmark	Gemini 3.1 Pro Preview	Inkling Small	Leader
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

Gemini 3.1 Pro Preview$0.0080Fits in one request

Inkling Small$0.0010Fits in one request

Inkling Small costs less

Repository review

50K input + 3K output tokens

Gemini 3.1 Pro Preview$0.136Fits in one request

Inkling Small$0.026Fits in one request

Inkling Small costs less

Agent loop

200K input + 10K output tokens

Gemini 3.1 Pro Preview$0.520Fits 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 Gemini 3.1 Pro Preview and Inkling Small
Specification	Google Gemini 3.1 Pro Preview	Thinking Machines Inkling Small
Maker	Google	Thinking Machines
Weights	No public weights listed	Open weights
Released	February 19, 2026	July 30, 2026
Context window	1.05M	524K
Input $/Mtok	$2.00	$0.45
Output $/Mtok	$12.00	$1.20
Coding index	32.3	27.3
Independent measurements behind it	4	4
Cost per solved task	$0.99	$0.16
Source	OpenRouter listing	OpenRouter listing

Questions

Is Gemini 3.1 Pro Preview better than Inkling Small for coding?

Pick Gemini 3.1 Pro Preview for coding: it scores 32.3 on the Vibe Coding Index against 27.3 for Inkling Small. Pick Inkling Small for output tokens 10.0x cheaper ($1.20 vs $12.00 per million) and a lower cost per solved task ($0.16 against $0.99).

Which is cheaper, Gemini 3.1 Pro Preview or Inkling Small?

Gemini 3.1 Pro Preview costs $2.00 per million input tokens and $12.00 per million output tokens; Inkling Small costs $0.45 and $1.20. Per solved SWE-bench Verified task, Gemini 3.1 Pro Preview costs $0.99 and Inkling Small $0.16.

Which has the bigger context window, Gemini 3.1 Pro Preview or Inkling Small?

Gemini 3.1 Pro Preview, with 1.05M tokens against 524K.

How many benchmarks is the Gemini 3.1 Pro Preview vs Inkling Small comparison based on?

79 benchmarks have a result for both models as of October 22, 2026. Gemini 3.1 Pro Preview's coding index rests on 4 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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Gemini 3.1 Pro Preview or Inkling Small: which to pick

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Math

Knowledge

Web design

General

Long documents

Everyday cost

Cost per solved task

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

Compare next