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Gemini 2.5 Pro vs o3 Mini

Updated October 21, 2026. 52 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Gemini 2.5 Pro Replace o3 Mini
Gemini 2.5 ProGoogle
Coding
37.0
Overall
16.1
Output $/M
$10.00
50
o3 MiniOpenAI
Coding
52.1
Overall
12.5
Output $/M
$4.40
1
vs boards won of 52 shared, 1 tied

Decision reading

Pick o3 Mini for coding: it scores 52.1 on the Vibe Coding Index against 37.0 for Gemini 2.5 Pro.

Pick Gemini 2.5 Pro when the context window is larger, 1.05M against 200K tokens, or when what matters is SWE-bench Verified or LiveCodeBench (Artificial Analysis run), where it leads.

Model AGemini 2.5 ProGoogle37.0/1002 independent benchmarks$0.64 per solved taskModel Bo3 MiniOpenAI52.1/1002 independent benchmarksNo cost per solved task
Shared results
52
Gemini 2.5 Pro only
35
o3 Mini only
18
Like-for-like categories
7 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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
Gemini 2.5 Pro 37.0 from 2 benchmarks, o3 Mini 52.1 from 2 benchmarks.
Widest category
Agentic work, 22.8 points apart on average over 1 shared benchmark.
Widest single gap
LMArena Text: Polish: Gemini 2.5 Pro 1479 against o3 Mini 1294, 30.8 points apart on a 0 to 100 scale.
Output price
Gemini 2.5 Pro $10.00 against o3 Mini $4.40 per million output tokens, 2.3x apart.
Context window
Gemini 2.5 Pro takes 1.05M 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
CategoryGemini 2.5 ProBarso3 MiniTies
Coding80
Intelligence20
Agentic work10
Reasoning80
Math401 tie
Knowledge60
General211
All shared boards5011 tie
CodingLike-for-likeFour of these boards feed the Vibe Coding Index80
Coding benchmarks for Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 MiniLeader
Aider polyglotNot measured60.4%Only o3 Mini measured
SWE-bench Verified53.6%42.4%Gemini 2.5 Pro
SWE-bench LiteNot measured32.3%Only o3 Mini measured
LMArena WebDev1226Not measuredOnly Gemini 2.5 Pro measured
AA Coding Index33.3Not measuredOnly Gemini 2.5 Pro measured
LiveCodeBench (Vals AI)Not measured71.5%Only o3 Mini measured
SWE-bench Verified (Vals AI)54.4%Not measuredOnly Gemini 2.5 Pro measured
Vibe Code Bench (Vals AI)0.4%Not measuredOnly Gemini 2.5 Pro measured
LiveCodeBench (Artificial Analysis run)80.1%73.4%Gemini 2.5 Pro
SciCode46.3%42.8%Gemini 2.5 Pro
Terminal-Bench Hard (Artificial Analysis run)26.5%6.8%Gemini 2.5 Pro
Terminal-Bench32.6%Not measuredOnly Gemini 2.5 Pro measured
GSO-Bench3.9%1.3%Gemini 2.5 Pro
WeirdML54.0%43.7%Gemini 2.5 Pro
CybenchNot measured22.5%Only o3 Mini measured
LMArena Text: coding14521378Gemini 2.5 Pro
LMArena Text: software and IT14591364Gemini 2.5 Pro
LMArena WebDev: HTML1235Not measuredOnly Gemini 2.5 Pro measured
LMArena WebDev: from an image1285Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 19 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 MiniLeader
AA Intelligence Index16.112.5Gemini 2.5 Pro
Epoch Capabilities Index145.1140.2Gemini 2.5 Pro
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 MiniLeader
AA Agentic Index1.6Not measuredOnly Gemini 2.5 Pro measured
τ²-Bench Telecom54.1%31.3%Gemini 2.5 Pro
GDPval23.3%Not measuredOnly Gemini 2.5 Pro measured
DeepResearch Bench41.5%Not measuredOnly Gemini 2.5 Pro measured
Vending-Bench 2$574Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index80
Reasoning benchmarks for Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 MiniLeader
GPQA DiamondNot measured75.5%Only o3 Mini measured
GPQA Diamond (Artificial Analysis run)84.4%77.3%Gemini 2.5 Pro
Humanity's Last Exam (Artificial Analysis run)22.5%12.0%Gemini 2.5 Pro
GPQA Diamond (Epoch AI run)85.3%77.0%Gemini 2.5 Pro
ARC-AGI41.0%34.5%Gemini 2.5 Pro
ARC-AGI-24.9%3.0%Gemini 2.5 Pro
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 prompts14551365Gemini 2.5 Pro
LMArena Text: expert14521364Gemini 2.5 Pro
LMArena Text: hard prompts in English14531375Gemini 2.5 Pro
LMArena Vision: diagrams1274Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: homework1281Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 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
AA Math Index87.7Not measuredOnly Gemini 2.5 Pro measured
AIME 2025 (Artificial Analysis run)87.7%Not measuredOnly Gemini 2.5 Pro measured
OTIS Mock AIME84.7%76.9%Gemini 2.5 Pro
FrontierMath, tiers 1 to 324.6%18.6%Gemini 2.5 Pro
FrontierMath, tier 40.0%0.0%Tie
MATH level 5Not measured96.5%Only o3 Mini measured
LMArena Text: math14501396Gemini 2.5 Pro
LMArena Text: mathematical work14541399Gemini 2.5 Pro
Neither model has a result on the other 2 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index60
Knowledge benchmarks for Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 MiniLeader
MMLU ProNot measured78.7%Only o3 Mini measured
LegalBench (Vals AI)Not measured71.5%Only o3 Mini measured
CaseLaw (Vals AI)63.9%Not measuredOnly Gemini 2.5 Pro measured
CorpFin (Vals AI)60.8%45.3%Gemini 2.5 Pro
TaxEval (Vals AI)Not measured69.4%Only o3 Mini measured
MortgageTax (Vals AI)68.9%Not measuredOnly Gemini 2.5 Pro measured
MedQA (Vals AI)Not measured94.8%Only o3 Mini measured
MedCode (Vals AI)50.6%Not measuredOnly Gemini 2.5 Pro measured
MMLU Pro (Artificial Analysis run)86.2%80.2%Gemini 2.5 Pro
SimpleQA VerifiedNot measured15.3%Only o3 Mini measured
LMArena Text: science14801339Gemini 2.5 Pro
LMArena Text: medicine and healthcare14761330Gemini 2.5 Pro
LMArena Text: legal and government14801328Gemini 2.5 Pro
LMArena Text: business and finance14391313Gemini 2.5 Pro
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 Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 MiniLeader
Design Arena: websites1167Not measuredOnly Gemini 2.5 Pro measured
Design Arena: UI components1139Not measuredOnly Gemini 2.5 Pro measured
Design Arena: game dev1112Not measuredOnly Gemini 2.5 Pro measured
Design Arena: data viz1222Not measuredOnly Gemini 2.5 Pro measured
Design Arena: 3D1080Not measuredOnly Gemini 2.5 Pro measured
Design Arena: all code categories1152Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index211
General benchmarks for Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 MiniLeader
SAGE (Vals AI)41.9%Not measuredOnly Gemini 2.5 Pro measured
MedScribe (Vals AI)73.5%Not measuredOnly Gemini 2.5 Pro measured
IFBench48.7%67.1%o3 Mini
Long context reasoning (AA-LCR)69.0%43.0%Gemini 2.5 Pro
DTBench82.4%68.8%Gemini 2.5 Pro
LMCA34.8%19.0%Gemini 2.5 Pro
Fiction.LiveBenchNot measured50.0%Only o3 Mini measured
Creative writing (Lech Mazur)83.8%61.7%Gemini 2.5 Pro
LMArena Text14581337Gemini 2.5 Pro
LMArena Text: instruction following14371337Gemini 2.5 Pro
LMArena Text: creative writing14541286Gemini 2.5 Pro
LMArena Vision1263Not measuredOnly Gemini 2.5 Pro measured
LMArena Text: English14581351Gemini 2.5 Pro
LMArena Text: non-English14521319Gemini 2.5 Pro
LMArena Text: Chinese15071379Gemini 2.5 Pro
LMArena Text: German14871303Gemini 2.5 Pro
LMArena Text: Japanese14611286Gemini 2.5 Pro
LMArena Text: Korean14341313Gemini 2.5 Pro
LMArena Text: French14731334Gemini 2.5 Pro
LMArena Text: Spanish14741321Gemini 2.5 Pro
LMArena Text: Russian14611304Gemini 2.5 Pro
LMArena Text: Polish14791294Gemini 2.5 Pro
LMArena Text: multi-turn14531320Gemini 2.5 Pro
LMArena Text: longer queries14491343Gemini 2.5 Pro
LMArena Text: writing and language14541313Gemini 2.5 Pro
LMArena Text: entertainment and media14411283Gemini 2.5 Pro
LMArena Vision: English1261Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: Chinese1300Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: reading text1270Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: humor1262Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: captioning1304Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: recognizing things1283Not measuredOnly Gemini 2.5 Pro measured
LMArena Vision: creative writing1265Not measuredOnly Gemini 2.5 Pro measured
LMArena Document1421Not measuredOnly Gemini 2.5 Pro measured
Neither model has a result on the other 12 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Gemini 2.5 Pro and o3 Mini
BenchmarkGemini 2.5 Proo3 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

Gemini 2.5 Pro$0.0063Fits in one request
o3 Mini$0.0033Fits in one request

o3 Mini costs less

Repository review

50K input + 3K output tokens

Gemini 2.5 Pro$0.092Fits in one request
o3 Mini$0.068Fits in one request

o3 Mini costs less

Agent loop

200K input + 10K output tokens

Gemini 2.5 Pro$0.350Fits in one request
o3 Mini$0.264Exceeds the context window

o3 Mini 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 2.5 Pro and o3 Mini
SpecificationGoogle Gemini 2.5 ProOpenAI o3 Mini
MakerGoogleOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedJune 17, 2025January 31, 2025
Context window1.05M200K
Input $/Mtok$1.25$1.10
Output $/Mtok$10.00$4.40
Coding index37.052.1
Independent measurements behind it22
Cost per solved task$0.64Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 2.5 Pro better than o3 Mini for coding?

Pick o3 Mini for coding: it scores 52.1 on the Vibe Coding Index against 37.0 for Gemini 2.5 Pro. Pick Gemini 2.5 Pro when the context window is larger, 1.05M against 200K tokens, or when what matters is SWE-bench Verified or LiveCodeBench (Artificial Analysis run), where it leads.

Which is cheaper, Gemini 2.5 Pro or o3 Mini?

Gemini 2.5 Pro costs $1.25 per million input tokens and $10.00 per million output tokens; o3 Mini costs $1.10 and $4.40. Cost per solved task is known for Gemini 2.5 Pro only.

Which has the bigger context window, Gemini 2.5 Pro or o3 Mini?

Gemini 2.5 Pro, with 1.05M tokens against 200K.

How many benchmarks is the Gemini 2.5 Pro vs o3 Mini comparison based on?

52 benchmarks have a result for both models as of October 21, 2026. Gemini 2.5 Pro's coding index rests on 2 independent benchmarks and o3 Mini's on 2. Where only one model has a result, the page says so instead of naming a winner.

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