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GPT-5 vs o3 Mini

GPT-5 leads o3 Mini on the Artificial Analysis Intelligence Index, 23.0 to 12.5, and o3 Mini costs 2.3x less per output token ($4.40 vs $10.00 per million). Updated October 22, 2026; 68 benchmarks have a result for both.

Replace GPT-5 Replace o3 Mini
GPT-5OpenAI
Coding
38.8
Overall
51.5
Output $/M
$10.00
67
o3 MiniOpenAI
Coding
No data
Overall
38.0
Output $/M
$4.40
1
vs boards won of 68 shared

GPT-5 or o3 Mini: which to pick

Only GPT-5 has a coding score, 38.8 on the Vibe Coding Index; o3 Mini has none, so the two cannot be ranked on coding.

Pick o3 Mini for output tokens 2.3x cheaper ($4.40 vs $10.00 per million) and work measured by SciCode, where it leads.

Model AGPT-5OpenAI38.8/1003 independent benchmarks$0.39 per solved taskModel Bo3 MiniOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
68
GPT-5 only
45
o3 Mini only
3
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
GPT-5 38.8 from 3 benchmarks, o3 Mini not benchmarked.
Widest category
Agentic work, 55.3 points apart on average over 1 shared benchmark.
Widest single gap
τ²-Bench Telecom: GPT-5 86.5% against o3 Mini 31.3%, 55.3 points apart on a 0 to 100 scale.
Output price
GPT-5 $10.00 against o3 Mini $4.40 per million output tokens, 2.3x apart.
Context window
GPT-5 takes 400K 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
CategoryGPT-5Barso3 MiniTies
Coding91
Intelligence20
Agentic work10
Reasoning120
Math90
Knowledge110
General230
All shared boards671
CodingLike-for-likeSix of these boards feed the Vibe Coding Index91
Coding benchmarks for GPT-5 and o3 Mini
BenchmarkGPT-5o3 MiniLeader
Aider polyglot88.0%60.4%GPT-5
SWE-bench Verified74.4%42.4%GPT-5
SWE-bench LiteNot measured32.3%Only o3 Mini measured
LMArena WebDev1418Not measuredOnly GPT-5 measured
AA Coding Index37.8Not measuredOnly GPT-5 measured
LiveCodeBench (Vals AI)85.9%71.5%GPT-5
SWE-bench Verified (Vals AI)69.0%Not measuredOnly GPT-5 measured
Vibe Code Bench (Vals AI)20.1%Not measuredOnly GPT-5 measured
LiveCodeBench (Artificial Analysis run)84.6%73.4%GPT-5
SciCodeNot measured42.8%Only o3 Mini measured
Terminal-Bench Hard (Artificial Analysis run)37.9%6.8%GPT-5
Terminal-Bench49.6%Not measuredOnly GPT-5 measured
GSO-Bench6.9%1.3%GPT-5
WeirdML60.7%43.7%GPT-5
CybenchNot measured22.5%Only o3 Mini measured
ALE-Bench807.6Not measuredOnly GPT-5 measured
LMArena Text: coding14361378GPT-5
LMArena Text: software and IT14201364GPT-5
LMArena WebDev: HTML1427Not measuredOnly GPT-5 measured
SciCode0.0%7.7%o3 Mini
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 GPT-5 and o3 Mini
BenchmarkGPT-5o3 MiniLeader
AA Intelligence Index23.012.5GPT-5
Epoch Capabilities Index150.0140.2GPT-5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for GPT-5 and o3 Mini
BenchmarkGPT-5o3 MiniLeader
τ²-Bench Telecom86.5%31.3%GPT-5
METR time horizons69.6%Not measuredOnly GPT-5 measured
Remote Labor Index1.7%Not measuredOnly GPT-5 measured
GDPval34.8%Not measuredOnly GPT-5 measured
BALROG32.8%Not measuredOnly GPT-5 measured
DeepResearch Bench49.6%Not measuredOnly GPT-5 measured
BrowseComp-Plus80.0%Not measuredOnly GPT-5 measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index120
Reasoning benchmarks for GPT-5 and o3 Mini
BenchmarkGPT-5o3 MiniLeader
GPQA Diamond85.6%75.5%GPT-5
MMMU Pro (Vals AI)81.5%Not measuredOnly GPT-5 measured
GPQA Diamond (Artificial Analysis run)85.4%77.3%GPT-5
Humanity's Last Exam (Artificial Analysis run)28.5%12.0%GPT-5
GPQA Diamond (Epoch AI run)86.2%77.0%GPT-5
ARC-AGI65.7%34.5%GPT-5
ARC-AGI-29.9%3.0%GPT-5
SimpleBench56.7%22.8%GPT-5
Chess puzzles36.0%15.0%GPT-5
Mystery game puzzles23.0%7.0%GPT-5
EBR-bench12.7%Not measuredOnly GPT-5 measured
VPCT66.0%Not measuredOnly GPT-5 measured
LMArena Text: hard prompts14151365GPT-5
LMArena Text: expert14191364GPT-5
LMArena Text: hard prompts in English14191375GPT-5
LMArena Vision: diagrams1252Not measuredOnly GPT-5 measured
LMArena Vision: homework1278Not measuredOnly GPT-5 measured
Kagi LLM Benchmark72.7%Not measuredOnly GPT-5 measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index90
Math benchmarks for GPT-5 and o3 Mini
BenchmarkGPT-5o3 MiniLeader
AIME93.4%86.5%GPT-5
MATH 500 (Vals AI)96.0%91.8%GPT-5
MGSM (Vals AI)92.8%91.3%GPT-5
AA Math Index94.3Not measuredOnly GPT-5 measured
AIME 2025 (Artificial Analysis run)94.3%Not measuredOnly GPT-5 measured
OTIS Mock AIME91.4%76.9%GPT-5
FrontierMath, tiers 1 to 355.4%18.6%GPT-5
FrontierMath, tier 422.0%0.0%GPT-5
ProofBench18.0%Not measuredOnly GPT-5 measured
MATH level 598.1%96.5%GPT-5
LMArena Text: math14071396GPT-5
LMArena Text: mathematical work14051399GPT-5
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index110
Knowledge benchmarks for GPT-5 and o3 Mini
BenchmarkGPT-5o3 MiniLeader
MMLU Pro86.5%78.7%GPT-5
LegalBench (Vals AI)86.0%71.5%GPT-5
CaseLaw (Vals AI)66.5%Not measuredOnly GPT-5 measured
CorpFin (Vals AI)61.1%45.3%GPT-5
TaxEval (Vals AI)73.4%69.4%GPT-5
MortgageTax (Vals AI)65.5%Not measuredOnly GPT-5 measured
MedQA (Vals AI)96.3%94.8%GPT-5
MedCode (Vals AI)49.6%Not measuredOnly GPT-5 measured
MMLU Pro (Artificial Analysis run)87.1%80.2%GPT-5
SimpleQA Verified50.1%15.3%GPT-5
GeoBench81.0%Not measuredOnly GPT-5 measured
LMArena Text: science14161339GPT-5
LMArena Text: medicine and healthcare14131330GPT-5
LMArena Text: legal and government14311328GPT-5
LMArena Text: business and finance14001313GPT-5
FACTS Benchmark Suite56.5%Not measuredOnly GPT-5 measured
Neither model has a result on the other 2 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Web design benchmarks for GPT-5 and o3 Mini
BenchmarkGPT-5o3 MiniLeader
Design Arena: websites1184Not measuredOnly GPT-5 measured
Design Arena: UI components1177Not measuredOnly GPT-5 measured
Design Arena: game dev1185Not measuredOnly GPT-5 measured
Design Arena: data viz1221Not measuredOnly GPT-5 measured
Design Arena: 3D1055Not measuredOnly GPT-5 measured
Design Arena: all code categories1167Not measuredOnly GPT-5 measured
Design Arena: SVG1188Not measuredOnly GPT-5 measured
Design Arena: ASCII art1141Not measuredOnly GPT-5 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index230
General benchmarks for GPT-5 and o3 Mini
BenchmarkGPT-5o3 MiniLeader
SAGE (Vals AI)43.7%Not measuredOnly GPT-5 measured
MedScribe (Vals AI)83.7%Not measuredOnly GPT-5 measured
IFBench73.1%67.1%GPT-5
Long context reasoning (AA-LCR)78.2%43.0%GPT-5
DTBench90.7%68.8%GPT-5
LMCA40.0%19.0%GPT-5
Fiction.LiveBench97.2%50.0%GPT-5
Creative writing (Lech Mazur)86.0%61.7%GPT-5
LMArena Text14061337GPT-5
LMArena Text: instruction following13881337GPT-5
LMArena Text: creative writing13651286GPT-5
LMArena Vision1232Not measuredOnly GPT-5 measured
LMArena Text: English14091351GPT-5
LMArena Text: non-English13971319GPT-5
LMArena Text: Chinese14221379GPT-5
LMArena Text: German14161303GPT-5
LMArena Text: Japanese14091286GPT-5
LMArena Text: Korean13601313GPT-5
LMArena Text: French14091334GPT-5
LMArena Text: Spanish13991321GPT-5
LMArena Text: Russian14071304GPT-5
LMArena Text: Polish14311294GPT-5
LMArena Text: multi-turn14261320GPT-5
LMArena Text: longer queries13991343GPT-5
LMArena Text: writing and language13841313GPT-5
LMArena Text: entertainment and media13791283GPT-5
LMArena Vision: English1231Not measuredOnly GPT-5 measured
LMArena Vision: Chinese1267Not measuredOnly GPT-5 measured
LMArena Vision: reading text1246Not measuredOnly GPT-5 measured
LMArena Vision: humor1219Not measuredOnly GPT-5 measured
LMArena Vision: captioning1212Not measuredOnly GPT-5 measured
LMArena Vision: recognizing things1263Not measuredOnly GPT-5 measured
LMArena Vision: creative writing1210Not measuredOnly GPT-5 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 GPT-5 and o3 Mini
BenchmarkGPT-5o3 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

GPT-5$0.0063Fits in one request
o3 Mini$0.0033Fits in one request

o3 Mini costs less

Repository review

50K input + 3K output tokens

GPT-5$0.092Fits in one request
o3 Mini$0.068Fits in one request

o3 Mini costs less

Agent loop

200K input + 10K output tokens

GPT-5$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 GPT-5 and o3 Mini
SpecificationOpenAI GPT-5OpenAI o3 Mini
MakerOpenAIOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedAugust 7, 2025January 31, 2025
Context window400K200K
Input $/Mtok$1.25$1.10
Output $/Mtok$10.00$4.40
Coding index38.8Not benchmarked
Independent measurements behind it30
Cost per solved task$0.39Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-5 better than o3 Mini for coding?

Only GPT-5 has a coding score, 38.8 on the Vibe Coding Index; o3 Mini has none, so the two cannot be ranked on coding. Pick o3 Mini for output tokens 2.3x cheaper ($4.40 vs $10.00 per million) and work measured by SciCode, where it leads.

Which is cheaper, GPT-5 or o3 Mini?

GPT-5 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 GPT-5 only.

Which has the bigger context window, GPT-5 or o3 Mini?

GPT-5, with 400K tokens against 200K.

How many benchmarks is the GPT-5 vs o3 Mini comparison based on?

68 benchmarks have a result for both models as of October 22, 2026. GPT-5's coding index rests on 3 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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