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Granite 4.2 8B vs o3 Mini

o3 Mini leads Granite 4.2 8B on the Artificial Analysis Intelligence Index, 12.5 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; 25 benchmarks have a result for both.

Replace Granite 4.2 8B Replace o3 Mini
Granite 4.2 8BIBM Granite
Coding
No data
Overall
No data
Output $/M
$0.20
6
o3 MiniOpenAI
Coding
No data
Overall
38.0
Output $/M
$4.40
19
vs boards won of 25 shared

Granite 4.2 8B or o3 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 SciCode or AA Intelligence Index, where it leads.

Model AGranite 4.2 8BIBM GraniteNot benchmarkedNo coding benchmarkNo cost per solved taskModel Bo3 MiniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
25
Granite 4.2 8B only
2
o3 Mini only
46
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, o3 Mini not benchmarked.
Widest category
Reasoning, 6.3 points apart on average over 5 shared benchmarks.
Widest single gap
GPQA Diamond (Artificial Analysis run): Granite 4.2 8B 63.1% against o3 Mini 77.3%, 14.2 points apart on a 0 to 100 scale.
Output price
Granite 4.2 8B $0.20 against o3 Mini $4.40 per million output tokens, 22.0x apart.
Context window
Granite 4.2 8B takes 131K tokens, o3 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 8BBarso3 MiniTies
Coding21
Intelligence01
Reasoning14
Knowledge22
General111
All shared boards619
CodingLike-for-likeSix of these boards feed the Vibe Coding Index21
Coding benchmarks for Granite 4.2 8B and o3 Mini
BenchmarkGranite 4.2 8Bo3 MiniLeader
Aider polyglotNot measured60.4%Only o3 Mini measured
SWE-bench VerifiedNot measured42.4%Only o3 Mini measured
SWE-bench LiteNot measured32.3%Only o3 Mini measured
AA Coding Index22.4Not measuredOnly Granite 4.2 8B measured
LiveCodeBench (Vals AI)Not measured71.5%Only o3 Mini measured
LiveCodeBench (Artificial Analysis run)Not measured73.4%Only o3 Mini measured
SciCode31.5%42.8%o3 Mini
Terminal-Bench Hard (Artificial Analysis run)Not measured6.8%Only o3 Mini measured
GSO-BenchNot measured1.3%Only o3 Mini measured
WeirdMLNot measured43.7%Only o3 Mini measured
CybenchNot measured22.5%Only o3 Mini measured
LMArena Text: coding13781378Granite 4.2 8B
LMArena Text: software and IT13671364Granite 4.2 8B
SciCodeNot measured7.7%Only o3 Mini measured
Neither model has a result on the other 25 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for Granite 4.2 8B and o3 Mini
BenchmarkGranite 4.2 8Bo3 MiniLeader
AA Intelligence Index11.112.5o3 Mini
Epoch Capabilities IndexNot measured140.2Only o3 Mini measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Agentic work benchmarks for Granite 4.2 8B and o3 Mini
BenchmarkGranite 4.2 8Bo3 MiniLeader
AA Agentic Index1.3Not measuredOnly Granite 4.2 8B measured
τ²-Bench TelecomNot measured31.3%Only o3 Mini measured
Neither model has a result on the other 39 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index14
Reasoning benchmarks for Granite 4.2 8B and o3 Mini
BenchmarkGranite 4.2 8Bo3 MiniLeader
GPQA DiamondNot measured75.5%Only o3 Mini measured
GPQA Diamond (Artificial Analysis run)63.1%77.3%o3 Mini
Humanity's Last Exam (Artificial Analysis run)9.7%12.0%o3 Mini
GPQA Diamond (Epoch AI run)Not measured77.0%Only o3 Mini measured
ARC-AGINot measured34.5%Only o3 Mini measured
ARC-AGI-2Not measured3.0%Only o3 Mini measured
SimpleBenchNot measured22.8%Only o3 Mini measured
Chess puzzlesNot measured15.0%Only o3 Mini measured
Mystery game puzzlesNot measured7.0%Only o3 Mini measured
LMArena Text: hard prompts13271365o3 Mini
LMArena Text: expert13861364Granite 4.2 8B
LMArena Text: hard prompts in English13451375o3 Mini
Neither model has a result on the other 10 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Math benchmarks for Granite 4.2 8B and o3 Mini
BenchmarkGranite 4.2 8Bo3 MiniLeader
AIMENot measured86.5%Only o3 Mini measured
MATH 500 (Vals AI)Not measured91.8%Only o3 Mini measured
MGSM (Vals AI)Not measured91.3%Only o3 Mini measured
OTIS Mock AIMENot measured76.9%Only o3 Mini measured
FrontierMath, tiers 1 to 3Not measured18.6%Only o3 Mini measured
FrontierMath, tier 4Not measured0.0%Only o3 Mini measured
MATH level 5Not measured96.5%Only o3 Mini measured
LMArena Text: mathNot measured1396Only o3 Mini measured
LMArena Text: mathematical workNot measured1399Only o3 Mini measured
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index22
Knowledge benchmarks for Granite 4.2 8B and o3 Mini
BenchmarkGranite 4.2 8Bo3 MiniLeader
MMLU ProNot measured78.7%Only o3 Mini measured
LegalBench (Vals AI)Not measured71.5%Only o3 Mini measured
CorpFin (Vals AI)Not measured45.3%Only o3 Mini measured
TaxEval (Vals AI)Not measured69.4%Only o3 Mini measured
MedQA (Vals AI)Not measured94.8%Only o3 Mini measured
MMLU Pro (Artificial Analysis run)Not measured80.2%Only o3 Mini measured
SimpleQA VerifiedNot measured15.3%Only o3 Mini measured
LMArena Text: science13361339o3 Mini
LMArena Text: medicine and healthcare13361330Granite 4.2 8B
LMArena Text: legal and government13271328o3 Mini
LMArena Text: business and finance13221313Granite 4.2 8B
Neither model has a result on the other 7 boards here
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Web design benchmarks for Granite 4.2 8B and o3 Mini
BenchmarkGranite 4.2 8Bo3 MiniLeader
Neither model has a result on 9 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index111
General benchmarks for Granite 4.2 8B and o3 Mini
BenchmarkGranite 4.2 8Bo3 MiniLeader
IFBenchNot measured67.1%Only o3 Mini measured
Long context reasoning (AA-LCR)45.0%43.0%Granite 4.2 8B
DTBenchNot measured68.8%Only o3 Mini measured
LMCANot measured19.0%Only o3 Mini measured
Fiction.LiveBenchNot measured50.0%Only o3 Mini measured
Creative writing (Lech Mazur)Not measured61.7%Only o3 Mini measured
LMArena Text13191337o3 Mini
LMArena Text: instruction following13001337o3 Mini
LMArena Text: creative writing12361286o3 Mini
LMArena Text: English13371351o3 Mini
LMArena Text: non-English13011319o3 Mini
LMArena Text: Chinese13671379o3 Mini
LMArena Text: GermanNot measured1303Only o3 Mini measured
LMArena Text: JapaneseNot measured1286Only o3 Mini measured
LMArena Text: KoreanNot measured1313Only o3 Mini measured
LMArena Text: FrenchNot measured1334Only o3 Mini measured
LMArena Text: SpanishNot measured1321Only o3 Mini measured
LMArena Text: Russian12821304o3 Mini
LMArena Text: PolishNot measured1294Only o3 Mini measured
LMArena Text: multi-turn13011320o3 Mini
LMArena Text: longer queries13251343o3 Mini
LMArena Text: writing and language12691313o3 Mini
LMArena Text: entertainment and media12711283o3 Mini
Neither model has a result on the other 23 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 o3 Mini
BenchmarkGranite 4.2 8Bo3 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
o3 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
o3 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
o3 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 o3 Mini
SpecificationIBM Granite 4.2 8BOpenAI o3 Mini
MakerIBM GraniteOpenAI
WeightsOpen weightsNo public weights listed
ReleasedAugust 31, 2026January 31, 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 o3 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 SciCode or AA Intelligence Index, where it leads.

Which is cheaper, Granite 4.2 8B or o3 Mini?

Granite 4.2 8B costs $0.08 per million input tokens and $0.20 per million output tokens; o3 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 o3 Mini?

o3 Mini, with 200K tokens against 131K.

How many benchmarks is the Granite 4.2 8B vs o3 Mini comparison based on?

25 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 o3 Mini's on 0. Where only one model has a result, the page says so instead of naming a winner.

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