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Granite 4.2 8B vs o4 Mini

o4 Mini leads Granite 4.2 8B on the Artificial Analysis Intelligence Index, 16.7 to 11.1, and Granite 4.2 8B costs 22.0x less per output token ($0.20 vs $4.40 per million). Updated October 22, 2026; 24 benchmarks have a result for both.

Replace Granite 4.2 8B Replace o4 Mini
Granite 4.2 8BIBM Granite
Coding
No data
Overall
No data
Output $/M
$0.20
4
o4 MiniOpenAI
Coding
No data
Overall
43.0
Output $/M
$4.40
20
vs boards won of 24 shared

Granite 4.2 8B or o4 Mini: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick Granite 4.2 8B for output tokens 22.0x cheaper ($0.20 vs $4.40 per million) and work measured by LMArena Text: software and IT or AA Intelligence Index, where it leads.

Model AGranite 4.2 8BIBM GraniteNot benchmarkedNo coding benchmarkNo cost per solved taskModel Bo4 MiniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
24
Granite 4.2 8B only
3
o4 Mini only
74
Like-for-like categories
5 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
Granite 4.2 8B not benchmarked, o4 Mini not benchmarked.
Widest category
Reasoning, 7.3 points apart on average over 5 shared benchmarks.
Widest single gap
Long context reasoning (AA-LCR): Granite 4.2 8B 45.0% against o4 Mini 61.0%, 16.0 points apart on a 0 to 100 scale.
Output price
Granite 4.2 8B $0.20 against o4 Mini $4.40 per million output tokens, 22.0x apart.
Context window
Granite 4.2 8B takes 131K tokens, o4 Mini 200K.

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
CategoryGranite 4.2 8BBarso4 MiniTies
Coding11
Intelligence01
Reasoning14
Knowledge04
General210
All shared boards420
CodingLike-for-likeSix of these boards feed the Vibe Coding Index11
Coding benchmarks for Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
Aider polyglotNot measured72.0%Only o4 Mini measured
SWE-bench VerifiedNot measured64.6%Only o4 Mini measured
SWE-bench MultimodalNot measured33.9%Only o4 Mini measured
AA Coding Index22.4Not measuredOnly Granite 4.2 8B measured
LiveCodeBench (Vals AI)Not measured82.2%Only o4 Mini measured
LiveCodeBench (Artificial Analysis run)Not measured85.9%Only o4 Mini measured
SciCode31.5%Not measuredOnly Granite 4.2 8B measured
Terminal-Bench Hard (Artificial Analysis run)Not measured15.2%Only o4 Mini measured
GSO-BenchNot measured3.6%Only o4 Mini measured
WeirdMLNot measured52.6%Only o4 Mini measured
LMArena Text: coding13781368Granite 4.2 8B
LMArena Text: software and IT13671367o4 Mini
SciCodeNot measured10.8%Only o4 Mini measured
Neither model has a result on the other 26 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
AA Intelligence Index11.116.7o4 Mini
Epoch Capabilities IndexNot measured145.5Only o4 Mini measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
Agentic work benchmarks for Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
AA Agentic Index1.3Not measuredOnly Granite 4.2 8B measured
τ²-Bench TelecomNot measured55.6%Only o4 Mini measured
METR time horizonsNot measured63.9%Only o4 Mini measured
Berkeley Function Calling Leaderboard (BFCL)Not measured53.2%Only o4 Mini measured
Neither model has a result on the other 37 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index14
Reasoning benchmarks for Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
GPQA DiamondNot measured74.5%Only o4 Mini measured
MMMU Pro (Vals AI)Not measured79.7%Only o4 Mini measured
GPQA Diamond (Artificial Analysis run)63.1%78.4%o4 Mini
Humanity's Last Exam (Artificial Analysis run)9.7%16.5%o4 Mini
GPQA Diamond (Epoch AI run)Not measured79.6%Only o4 Mini measured
ARC-AGINot measured58.7%Only o4 Mini measured
ARC-AGI-2Not measured6.1%Only o4 Mini measured
SimpleBenchNot measured38.7%Only o4 Mini measured
Chess puzzlesNot measured22.0%Only o4 Mini measured
Mystery game puzzlesNot measured5.0%Only o4 Mini measured
VPCTNot measured57.5%Only o4 Mini measured
LMArena Text: hard prompts13271351o4 Mini
LMArena Text: expert13861343Granite 4.2 8B
LMArena Text: hard prompts in English13451366o4 Mini
LMArena Vision: diagramsNot measured1197Only o4 Mini measured
LMArena Vision: homeworkNot measured1234Only o4 Mini measured
Kagi LLM BenchmarkNot measured67.6%Only o4 Mini measured
Neither model has a result on the other 5 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index11 boards, none shared
Math benchmarks for Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
AIMENot measured83.7%Only o4 Mini measured
MATH 500 (Vals AI)Not measured94.2%Only o4 Mini measured
MGSM (Vals AI)Not measured93.4%Only o4 Mini measured
AA Math IndexNot measured90.7Only o4 Mini measured
AIME 2025 (Artificial Analysis run)Not measured90.7%Only o4 Mini measured
OTIS Mock AIMENot measured81.7%Only o4 Mini measured
FrontierMath, tiers 1 to 3Not measured36.1%Only o4 Mini measured
FrontierMath, tier 4Not measured4.9%Only o4 Mini measured
MATH level 5Not measured97.8%Only o4 Mini measured
LMArena Text: mathNot measured1389Only o4 Mini measured
LMArena Text: mathematical workNot measured1379Only o4 Mini measured
Neither model has a result on the other 2 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
MMLU ProNot measured80.6%Only o4 Mini measured
LegalBench (Vals AI)Not measured79.2%Only o4 Mini measured
CorpFin (Vals AI)Not measured59.0%Only o4 Mini measured
TaxEval (Vals AI)Not measured74.8%Only o4 Mini measured
MortgageTax (Vals AI)Not measured64.8%Only o4 Mini measured
MedQA (Vals AI)Not measured96.0%Only o4 Mini measured
MedCode (Vals AI)Not measured33.8%Only o4 Mini measured
MMLU Pro (Artificial Analysis run)Not measured83.2%Only o4 Mini measured
SimpleQA VerifiedNot measured19.6%Only o4 Mini measured
GeoBenchNot measured64.0%Only o4 Mini measured
LMArena Text: science13361354o4 Mini
LMArena Text: medicine and healthcare13361361o4 Mini
LMArena Text: legal and government13271350o4 Mini
LMArena Text: business and finance13221325o4 Mini
FACTS Benchmark SuiteNot measured28.1%Only o4 Mini measured
Neither model has a result on the other 3 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
Design Arena: websitesNot measured985Only o4 Mini measured
Design Arena: UI componentsNot measured983Only o4 Mini measured
Design Arena: game devNot measured1003Only o4 Mini measured
Design Arena: data vizNot measured991Only o4 Mini measured
Design Arena: 3DNot measured854Only o4 Mini measured
Design Arena: all code categoriesNot measured976Only o4 Mini measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index210
General benchmarks for Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
SAGE (Vals AI)Not measured41.1%Only o4 Mini measured
MedScribe (Vals AI)Not measured69.1%Only o4 Mini measured
IFBenchNot measured68.7%Only o4 Mini measured
Long context reasoning (AA-LCR)45.0%61.0%o4 Mini
DTBenchNot measured77.6%Only o4 Mini measured
LMCANot measured26.5%Only o4 Mini measured
Fiction.LiveBenchNot measured77.8%Only o4 Mini measured
Creative writing (Lech Mazur)Not measured75.0%Only o4 Mini measured
LMArena Text13191353o4 Mini
LMArena Text: instruction following13001320o4 Mini
LMArena Text: creative writing12361294o4 Mini
LMArena VisionNot measured1194Only o4 Mini measured
LMArena Text: English13371367o4 Mini
LMArena Text: non-English13011337o4 Mini
LMArena Text: Chinese13671354Granite 4.2 8B
LMArena Text: GermanNot measured1336Only o4 Mini measured
LMArena Text: JapaneseNot measured1308Only o4 Mini measured
LMArena Text: KoreanNot measured1312Only o4 Mini measured
LMArena Text: FrenchNot measured1364Only o4 Mini measured
LMArena Text: SpanishNot measured1346Only o4 Mini measured
LMArena Text: Russian12821334o4 Mini
LMArena Text: PolishNot measured1358Only o4 Mini measured
LMArena Text: multi-turn13011350o4 Mini
LMArena Text: longer queries13251315Granite 4.2 8B
LMArena Text: writing and language12691316o4 Mini
LMArena Text: entertainment and media12711308o4 Mini
LMArena Vision: EnglishNot measured1200Only o4 Mini measured
LMArena Vision: ChineseNot measured1218Only o4 Mini measured
LMArena Vision: reading textNot measured1197Only o4 Mini measured
LMArena Vision: humorNot measured1199Only o4 Mini measured
LMArena Vision: captioningNot measured1204Only o4 Mini measured
LMArena Vision: recognizing thingsNot measured1218Only o4 Mini measured
LMArena Vision: creative writingNot measured1166Only o4 Mini measured
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 Granite 4.2 8B and o4 Mini
BenchmarkGranite 4.2 8Bo4 MiniLeader
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

Granite 4.2 8B$0.0002Fits in one request
o4 Mini$0.0033Fits in one request

Granite 4.2 8B costs less

Repository review

50K input + 3K output tokens

Granite 4.2 8B$0.0046Fits in one request
o4 Mini$0.068Fits in one request

Granite 4.2 8B costs less

Agent loop

200K input + 10K output tokens

Granite 4.2 8B$0.018Exceeds the context window
o4 Mini$0.264Exceeds the context window

Granite 4.2 8B 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 Granite 4.2 8B and o4 Mini
SpecificationIBM Granite 4.2 8BOpenAI o4 Mini
MakerIBM GraniteOpenAI
WeightsOpen weightsNo public weights listed
ReleasedAugust 31, 2026April 16, 2025
Context window131K200K
Input $/Mtok$0.08$1.10
Output $/Mtok$0.20$4.40
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Granite 4.2 8B better than o4 Mini for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Granite 4.2 8B for output tokens 22.0x cheaper ($0.20 vs $4.40 per million) and work measured by LMArena Text: software and IT or AA Intelligence Index, where it leads.

Which is cheaper, Granite 4.2 8B or o4 Mini?

Granite 4.2 8B costs $0.08 per million input tokens and $0.20 per million output tokens; o4 Mini costs $1.10 and $4.40. Cost per solved task is known for neither of them.

Which has the bigger context window, Granite 4.2 8B or o4 Mini?

o4 Mini, with 200K tokens against 131K.

How many benchmarks is the Granite 4.2 8B vs o4 Mini comparison based on?

24 benchmarks have a result for both models as of October 22, 2026. Granite 4.2 8B's coding index rests on 0 independent benchmarks and o4 Mini's on 0. Where only one model has a result, the page says so instead of naming a winner.

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