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Gemma 3 12B vs GPT-5 Mini

GPT-5 Mini leads Gemma 3 12B on the Artificial Analysis Intelligence Index, 20.6 to 3.8, and Gemma 3 12B costs 12.3x less per output token ($0.1625 vs $2.00 per million). Updated October 21, 2026; 39 benchmarks have a result for both.

Replace Gemma 3 12B Replace GPT-5 Mini
Gemma 3 12BGoogle
Coding
No data
Overall
3.8
Output $/M
$0.1625
4
GPT-5 MiniOpenAI
Coding
34.2
Overall
20.6
Output $/M
$2.00
35
vs boards won of 39 shared

Gemma 3 12B or GPT-5 Mini: which to pick

Only GPT-5 Mini has a coding score, 34.2 on the Vibe Coding Index; Gemma 3 12B has none, so the two cannot be ranked on coding.

Pick Gemma 3 12B for output tokens 12.3x cheaper ($0.1625 vs $2.00 per million) and work measured by LMArena Text: legal and government or LMArena Text: business and finance, where it leads.

Model AGemma 3 12BGoogleNot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-5 MiniOpenAI34.2/1002 independent benchmarks$0.08 per solved task
Shared results
39
Gemma 3 12B only
2
GPT-5 Mini only
59
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.

At a glance

Coding index
Gemma 3 12B not benchmarked, GPT-5 Mini 34.2 from 2 benchmarks.
Widest category
Agentic work, 60.2 points apart on average over 1 shared benchmark.
Widest single gap
AA Math Index: Gemma 3 12B 18.3 against GPT-5 Mini 90.7, 72.4 points apart on a 0 to 100 scale.
Output price
Gemma 3 12B $0.1625 against GPT-5 Mini $2.00 per million output tokens, 12.3x apart.
Context window
Gemma 3 12B takes 131K tokens, GPT-5 Mini 400K.

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
CategoryGemma 3 12BBarsGPT-5 MiniTies
Coding05
Intelligence02
Agentic work01
Reasoning06
Math05
Knowledge23
General213
All shared boards435
CodingLike-for-likeSix of these boards feed the Vibe Coding Index05
Coding benchmarks for Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 MiniLeader
SWE-bench VerifiedNot measured59.8%Only GPT-5 Mini measured
SWE-bench MultilingualNot measured39.7%Only GPT-5 Mini measured
AA Coding Index5.8Not measuredOnly Gemma 3 12B measured
LiveCodeBench (Vals AI)Not measured86.6%Only GPT-5 Mini measured
SWE-bench Verified (Vals AI)Not measured60.8%Only GPT-5 Mini measured
Vibe Code Bench (Vals AI)Not measured14.2%Only GPT-5 Mini measured
LiveCodeBench (Artificial Analysis run)13.7%83.8%GPT-5 Mini
SciCode16.4%39.0%GPT-5 Mini
Terminal-Bench Hard (Artificial Analysis run)0.8%33.3%GPT-5 Mini
Terminal-BenchNot measured34.8%Only GPT-5 Mini measured
WeirdMLNot measured52.7%Only GPT-5 Mini measured
LMArena Text: coding12811406GPT-5 Mini
LMArena Text: software and IT13131394GPT-5 Mini
Neither model has a result on the other 25 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 MiniLeader
AA Intelligence Index3.820.6GPT-5 Mini
Epoch Capabilities Index123.5145.3GPT-5 Mini
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 MiniLeader
AA Agentic Index0.1Not measuredOnly Gemma 3 12B measured
τ²-Bench Telecom10.8%71.1%GPT-5 Mini
Vending-Bench 2Not measured-$31Only GPT-5 Mini measured
Neither model has a result on the other 36 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index06
Reasoning benchmarks for Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 MiniLeader
GPQA DiamondNot measured80.3%Only GPT-5 Mini measured
MMMU Pro (Vals AI)Not measured78.9%Only GPT-5 Mini measured
GPQA Diamond (Artificial Analysis run)34.9%82.8%GPT-5 Mini
Humanity's Last Exam (Artificial Analysis run)4.2%21.5%GPT-5 Mini
GPQA Diamond (Epoch AI run)39.5%75.0%GPT-5 Mini
ARC-AGINot measured54.3%Only GPT-5 Mini measured
ARC-AGI-2Not measured4.4%Only GPT-5 Mini measured
Chess puzzlesNot measured24.0%Only GPT-5 Mini measured
Mystery game puzzlesNot measured10.0%Only GPT-5 Mini measured
VPCTNot measured40.2%Only GPT-5 Mini measured
LMArena Text: hard prompts13091380GPT-5 Mini
LMArena Text: expert12481379GPT-5 Mini
LMArena Text: hard prompts in English13181383GPT-5 Mini
LMArena Vision: diagramsNot measured1202Only GPT-5 Mini measured
LMArena Vision: homeworkNot measured1210Only GPT-5 Mini measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index05
Math benchmarks for Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 MiniLeader
AIMENot measured91.5%Only GPT-5 Mini measured
MATH 500 (Vals AI)Not measured94.8%Only GPT-5 Mini measured
MGSM (Vals AI)Not measured92.6%Only GPT-5 Mini measured
AA Math Index18.390.7GPT-5 Mini
AIME 2025 (Artificial Analysis run)18.3%90.7%GPT-5 Mini
OTIS Mock AIME16.7%86.7%GPT-5 Mini
FrontierMath, tiers 1 to 3Not measured46.7%Only GPT-5 Mini measured
FrontierMath, tier 4Not measured12.2%Only GPT-5 Mini measured
ProofBenchNot measured9.0%Only GPT-5 Mini measured
MATH level 5Not measured97.8%Only GPT-5 Mini measured
LMArena Text: math13071378GPT-5 Mini
LMArena Text: mathematical work13361380GPT-5 Mini
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index23
Knowledge benchmarks for Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 MiniLeader
MMLU ProNot measured82.2%Only GPT-5 Mini measured
LegalBench (Vals AI)Not measured81.8%Only GPT-5 Mini measured
CaseLaw (Vals AI)Not measured68.5%Only GPT-5 Mini measured
CorpFin (Vals AI)Not measured60.2%Only GPT-5 Mini measured
TaxEval (Vals AI)Not measured75.2%Only GPT-5 Mini measured
MortgageTax (Vals AI)Not measured66.9%Only GPT-5 Mini measured
MedQA (Vals AI)Not measured96.1%Only GPT-5 Mini measured
MedCode (Vals AI)Not measured43.0%Only GPT-5 Mini measured
MMLU Pro (Artificial Analysis run)59.5%83.7%GPT-5 Mini
SimpleQA VerifiedNot measured21.6%Only GPT-5 Mini measured
LMArena Text: science13661371GPT-5 Mini
LMArena Text: medicine and healthcare13341380GPT-5 Mini
LMArena Text: legal and government13811375Gemma 3 12B
LMArena Text: business and finance13761358Gemma 3 12B
Neither model has a result on the other 3 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 MiniLeader
Design Arena: websitesNot measured1125Only GPT-5 Mini measured
Design Arena: UI componentsNot measured1106Only GPT-5 Mini measured
Design Arena: game devNot measured1130Only GPT-5 Mini measured
Design Arena: data vizNot measured1130Only GPT-5 Mini measured
Design Arena: 3DNot measured1037Only GPT-5 Mini measured
Design Arena: all code categoriesNot measured1115Only GPT-5 Mini measured
Design Arena: SVGNot measured1091Only GPT-5 Mini measured
Design Arena: ASCII artNot measured1125Only GPT-5 Mini measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index213
General benchmarks for Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 MiniLeader
SAGE (Vals AI)Not measured43.0%Only GPT-5 Mini measured
MedScribe (Vals AI)Not measured80.6%Only GPT-5 Mini measured
IFBench36.7%75.4%GPT-5 Mini
Long context reasoning (AA-LCR)8.3%72.3%GPT-5 Mini
DTBench48.8%80.5%GPT-5 Mini
LMCA4.5%34.2%GPT-5 Mini
Fiction.LiveBenchNot measured69.4%Only GPT-5 Mini measured
Creative writing (Lech Mazur)Not measured83.1%Only GPT-5 Mini measured
LMArena Text13341373GPT-5 Mini
LMArena Text: instruction following12991357GPT-5 Mini
LMArena Text: creative writing13311325Gemma 3 12B
LMArena VisionNot measured1202Only GPT-5 Mini measured
LMArena Text: English13491379GPT-5 Mini
LMArena Text: non-English13181363GPT-5 Mini
LMArena Text: ChineseNot measured1386Only GPT-5 Mini measured
LMArena Text: German13701366Gemma 3 12B
LMArena Text: JapaneseNot measured1341Only GPT-5 Mini measured
LMArena Text: KoreanNot measured1308Only GPT-5 Mini measured
LMArena Text: FrenchNot measured1386Only GPT-5 Mini measured
LMArena Text: SpanishNot measured1354Only GPT-5 Mini measured
LMArena Text: Russian13351362GPT-5 Mini
LMArena Text: PolishNot measured1378Only GPT-5 Mini measured
LMArena Text: multi-turn13341363GPT-5 Mini
LMArena Text: longer queries13171355GPT-5 Mini
LMArena Text: writing and language13071344GPT-5 Mini
LMArena Text: entertainment and media12971340GPT-5 Mini
LMArena Vision: EnglishNot measured1216Only GPT-5 Mini measured
LMArena Vision: ChineseNot measured1214Only GPT-5 Mini measured
LMArena Vision: reading textNot measured1199Only GPT-5 Mini measured
LMArena Vision: humorNot measured1205Only GPT-5 Mini measured
LMArena Vision: captioningNot measured1217Only GPT-5 Mini measured
LMArena Vision: recognizing thingsNot measured1226Only GPT-5 Mini measured
LMArena Vision: creative writingNot measured1181Only GPT-5 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 Gemma 3 12B and GPT-5 Mini
BenchmarkGemma 3 12BGPT-5 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

Gemma 3 12B$0.0002Fits in one request
GPT-5 Mini$0.0013Fits in one request

Gemma 3 12B costs less

Repository review

50K input + 3K output tokens

Gemma 3 12B$0.0042Fits in one request
GPT-5 Mini$0.018Fits in one request

Gemma 3 12B costs less

Agent loop

200K input + 10K output tokens

Gemma 3 12B$0.017Exceeds the context window
GPT-5 Mini$0.070Fits in one request

Gemma 3 12B 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 Gemma 3 12B and GPT-5 Mini
SpecificationGoogle Gemma 3 12BOpenAI GPT-5 Mini
MakerGoogleOpenAI
WeightsOpen weightsNo public weights listed
ReleasedMarch 13, 2025August 7, 2025
Context window131K400K
Input $/Mtok$0.075$0.25
Output $/Mtok$0.1625$2.00
Coding indexNot benchmarked34.2
Independent measurements behind it02
Cost per solved taskNot computable$0.08
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemma 3 12B better than GPT-5 Mini for coding?

Only GPT-5 Mini has a coding score, 34.2 on the Vibe Coding Index; Gemma 3 12B has none, so the two cannot be ranked on coding. Pick Gemma 3 12B for output tokens 12.3x cheaper ($0.1625 vs $2.00 per million) and work measured by LMArena Text: legal and government or LMArena Text: business and finance, where it leads.

Which is cheaper, Gemma 3 12B or GPT-5 Mini?

Gemma 3 12B costs $0.075 per million input tokens and $0.1625 per million output tokens; GPT-5 Mini costs $0.25 and $2.00. Cost per solved task is known for GPT-5 Mini only.

Which has the bigger context window, Gemma 3 12B or GPT-5 Mini?

GPT-5 Mini, with 400K tokens against 131K.

How many benchmarks is the Gemma 3 12B vs GPT-5 Mini comparison based on?

39 benchmarks have a result for both models as of October 21, 2026. Gemma 3 12B's coding index rests on 0 independent benchmarks and GPT-5 Mini's on 2. Where only one model has a result, the page says so instead of naming a winner.

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