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Phi 4 vs Inkling Small

Inkling Small leads Phi 4 on the Artificial Analysis Intelligence Index, 25.7 to 5.9, and Phi 4 costs 8.6x less per output token ($0.14 vs $1.20 per million). Updated October 21, 2026; 34 benchmarks have a result for both.

Replace Phi 4 Replace Inkling Small
Phi 4Microsoft
Coding
No data
Overall
24.7
Output $/M
$0.14
0
T Inkling SmallThinking Machines
Coding
27.3
Overall
43.6
Output $/M
$1.20
34
vs boards won of 34 shared

Phi 4 or Inkling Small: which to pick

Only Inkling Small has a coding score, 27.3 on the Vibe Coding Index; Phi 4 has none, so the two cannot be ranked on coding.

Pick Phi 4 for output tokens 8.6x cheaper ($0.14 vs $1.20 per million).

Model APhi 4MicrosoftNot benchmarkedNo coding benchmarkNo cost per solved taskModel BInkling SmallThinking Machines27.3/1004 independent benchmarks$0.16 per solved task
Shared results
34
Phi 4 only
12
Inkling Small only
50
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
Phi 4 not benchmarked, Inkling Small 27.3 from 4 benchmarks.
Widest category
Math, 47.6 points apart on average over 3 shared benchmarks.
Widest single gap
OTIS Mock AIME: Phi 4 13.8% against Inkling Small 90.0%, 76.3 points apart on a 0 to 100 scale.
Output price
Phi 4 $0.14 against Inkling Small $1.20 per million output tokens, 8.6x apart.
Context window
Phi 4 takes 16K 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
CategoryPhi 4BarsInkling SmallTies
Coding02
Intelligence02
Reasoning06
Math03
Knowledge04
General017
All shared boards034
CodingLike-for-likeSix of these boards feed the Vibe Coding Index02
Coding benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling SmallLeader
LMArena WebDevNot measured1409Only Inkling Small measured
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)Not measured0.0%Only Inkling Small measured
Vibe Code Bench (Vals AI)Not measured19.1%Only Inkling Small measured
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)23.1%Not measuredOnly Phi 4 measured
SciCodeNot measured49.7%Only Inkling Small measured
Terminal-Bench Hard (Artificial Analysis run)3.8%Not measuredOnly Phi 4 measured
LMArena Text: coding12311450Inkling Small
LMArena Text: software and IT12281447Inkling Small
LMArena WebDev: ReactNot measured1399Only Inkling Small measured
LMArena WebDev: HTMLNot measured1398Only Inkling Small measured
LMArena WebDev: from an imageNot measured1410Only Inkling Small measured
Neither model has a result on the other 19 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling SmallLeader
AA Intelligence Index5.925.7Inkling Small
Epoch Capabilities Index130.5150.3Inkling Small
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Agentic work benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling 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 Telecom0.0%Not measuredOnly Phi 4 measured
BALROG11.6%Not measuredOnly Phi 4 measured
Berkeley Function Calling Leaderboard (BFCL)28.8%Not measuredOnly Phi 4 measured
Neither model has a result on the other 32 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index06
Reasoning benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling SmallLeader
GPQA DiamondNot measured83.6%Only Inkling Small measured
GPQA Diamond (Artificial Analysis run)57.5%89.5%Inkling Small
Humanity's Last Exam (Artificial Analysis run)3.8%33.3%Inkling Small
GPQA Diamond (Epoch AI run)56.1%88.5%Inkling Small
ARC-AGINot measured84.0%Only Inkling Small measured
ARC-AGI-2Not measured40.1%Only Inkling Small measured
Mystery game puzzlesNot measured6.0%Only Inkling Small measured
LMArena Text: hard prompts12201423Inkling Small
LMArena Text: expert12031441Inkling Small
LMArena Text: hard prompts in English12301429Inkling Small
LMArena Vision: diagramsNot measured1251Only Inkling Small measured
LMArena Vision: homeworkNot measured1257Only Inkling Small measured
Neither model has a result on the other 10 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index03
Math benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling SmallLeader
AA Math Index18.0Not measuredOnly Phi 4 measured
AIME 2025 (Artificial Analysis run)18.0%Not measuredOnly Phi 4 measured
OTIS Mock AIME13.8%90.0%Inkling Small
FrontierMath, tiers 1 to 3Not measured46.3%Only Inkling Small measured
FrontierMath, tier 4Not measured17.1%Only Inkling Small measured
ProofBenchNot measured6.0%Only Inkling Small measured
MATH level 564.9%Not measuredOnly Phi 4 measured
LMArena Text: math12461459Inkling Small
LMArena Text: mathematical work12541441Inkling Small
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling 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)Not measured37.9%Only Inkling Small measured
MMLU Pro (Artificial Analysis run)71.4%Not measuredOnly Phi 4 measured
SimpleQA VerifiedNot measured19.1%Only Inkling Small measured
MMLU84.8%Not measuredOnly Phi 4 measured
LMArena Text: science12061428Inkling Small
LMArena Text: medicine and healthcare12021413Inkling Small
LMArena Text: legal and government12411415Inkling Small
LMArena Text: business and finance11991413Inkling Small
Neither model has a result on the other 5 boards here
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Web design benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling SmallLeader
Neither model has a result on 9 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index017
General benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling SmallLeader
Vals IndexNot measured27.6%Only Inkling Small measured
Public Benefits Bench (Vals AI)Not measured59.4%Only Inkling Small measured
SAGE (Vals AI)Not measured32.7%Only Inkling Small measured
MedScribe (Vals AI)Not measured84.1%Only Inkling Small measured
Vals Multimodal IndexNot measured50.0%Only Inkling Small measured
IFBench23.5%Not measuredOnly Phi 4 measured
Long context reasoning (AA-LCR)0.0%75.7%Inkling Small
Creative writing (Lech Mazur)62.6%Not measuredOnly Phi 4 measured
LMArena Text12171413Inkling Small
LMArena Text: instruction following12011399Inkling Small
LMArena Text: creative writing11811334Inkling Small
LMArena VisionNot measured1237Only Inkling Small measured
LMArena Text: English12311421Inkling Small
LMArena Text: non-English11971401Inkling Small
LMArena Text: Chinese12121464Inkling Small
LMArena Text: German12221408Inkling Small
LMArena Text: Japanese11581401Inkling Small
LMArena Text: Korean11511367Inkling Small
LMArena Text: French12241435Inkling Small
LMArena Text: Spanish12341422Inkling Small
LMArena Text: Russian12091394Inkling Small
LMArena Text: PolishNot measured1428Only Inkling Small measured
LMArena Text: multi-turn12061416Inkling Small
LMArena Text: longer queries12171402Inkling Small
LMArena Text: writing and language11981357Inkling Small
LMArena Text: entertainment and media11621352Inkling Small
LMArena Vision: EnglishNot measured1243Only Inkling Small measured
LMArena Vision: ChineseNot measured1292Only Inkling Small measured
LMArena Vision: reading textNot measured1243Only Inkling Small measured
LMArena Vision: humorNot measured1207Only Inkling Small measured
LMArena Vision: creative writingNot measured1205Only Inkling Small measured
Neither model has a result on the other 15 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Phi 4 and Inkling Small
BenchmarkPhi 4Inkling 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

Phi 4$0.0001Fits in one request
Inkling Small$0.0010Fits in one request

Phi 4 costs less

Repository review

50K input + 3K output tokens

Phi 4$0.0039Exceeds the context window
Inkling Small$0.026Fits in one request

Phi 4 costs less

Agent loop

200K input + 10K output tokens

Phi 4$0.015Exceeds the context window
Inkling Small$0.102Fits in one request

Phi 4 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 Phi 4 and Inkling Small
SpecificationMicrosoft Phi 4Thinking Machines Inkling Small
MakerMicrosoftThinking Machines
WeightsOpen weightsOpen weights
ReleasedJanuary 10, 2025July 30, 2026
Context window16K524K
Input $/Mtok$0.07$0.45
Output $/Mtok$0.14$1.20
Coding indexNot benchmarked27.3
Independent measurements behind it04
Cost per solved taskNot computable$0.16
SourceOpenRouter listingOpenRouter listing

Questions

Is Phi 4 better than Inkling Small for coding?

Only Inkling Small has a coding score, 27.3 on the Vibe Coding Index; Phi 4 has none, so the two cannot be ranked on coding. Pick Phi 4 for output tokens 8.6x cheaper ($0.14 vs $1.20 per million).

Which is cheaper, Phi 4 or Inkling Small?

Phi 4 costs $0.07 per million input tokens and $0.14 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, Phi 4 or Inkling Small?

Inkling Small, with 524K tokens against 16K.

How many benchmarks is the Phi 4 vs Inkling Small comparison based on?

34 benchmarks have a result for both models as of October 21, 2026. Phi 4's coding index rests on 0 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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