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Claude Opus 4.1 vs o4 Mini

Updated October 21, 2026. 62 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Opus 4.1 Replace o4 Mini
Claude Opus 4.1Anthropic
Coding
27.2
Overall
22.8
Output $/M
$75.00
48
o4 MiniOpenAI
Coding
68.6
Overall
16.7
Output $/M
$4.40
14
vs boards won of 62 shared

Decision reading

Pick o4 Mini for coding: it scores 68.6 on the Vibe Coding Index against 27.2 for Claude Opus 4.1.

Pick Claude Opus 4.1 when what matters is LMArena Text: coding or LMArena Text: software and IT, where it leads.

Model AClaude Opus 4.1Anthropic27.2/1001 independent benchmarkNo cost per solved taskModel Bo4 MiniOpenAI68.6/1002 independent benchmarksNo cost per solved task
Shared results
62
Claude Opus 4.1 only
9
o4 Mini only
32
Like-for-like categories
8 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
Claude Opus 4.1 27.2 from 1 benchmark, o4 Mini 68.6 from 2 benchmarks.
Widest category
Web design, 25.2 points apart on average over 6 shared benchmarks.
Widest single gap
Design Arena: 3D: Claude Opus 4.1 1153 against o4 Mini 854, 37.4 points apart on a 0 to 100 scale.
Output price
Claude Opus 4.1 $75.00 against o4 Mini $4.40 per million output tokens, 17.0x apart.
Context window
Both take 200K tokens.

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
CategoryClaude Opus 4.1Barso4 MiniTies
Coding22
Intelligence11
Agentic work10
Reasoning63
Math44
Knowledge73
Web design60
General211
All shared boards4814
CodingLike-for-likeFour of these boards feed the Vibe Coding Index22
Coding benchmarks for Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 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
LMArena WebDev1390Not measuredOnly Claude Opus 4.1 measured
LiveCodeBench (Vals AI)66.5%82.2%o4 Mini
LiveCodeBench (Artificial Analysis run)Not measured85.9%Only o4 Mini measured
Terminal-Bench Hard (Artificial Analysis run)Not measured15.2%Only o4 Mini measured
Terminal-Bench38.0%Not measuredOnly Claude Opus 4.1 measured
GSO-BenchNot measured3.6%Only o4 Mini measured
WeirdML45.9%52.6%o4 Mini
Cybench42.0%Not measuredOnly Claude Opus 4.1 measured
LMArena Text: coding14791368Claude Opus 4.1
LMArena Text: software and IT14561367Claude Opus 4.1
LMArena WebDev: HTML1399Not measuredOnly Claude Opus 4.1 measured
Neither model has a result on the other 24 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index11
Intelligence benchmarks for Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 MiniLeader
AA Intelligence Index22.816.7Claude Opus 4.1
Epoch Capabilities Index144.1145.5o4 Mini
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 MiniLeader
τ²-Bench TelecomNot measured55.6%Only o4 Mini measured
METR time horizons66.8%63.9%Claude Opus 4.1
GDPval43.6%Not measuredOnly Claude Opus 4.1 measured
DeepResearch Bench48.3%Not measuredOnly Claude Opus 4.1 measured
Neither model has a result on the other 35 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index63
Reasoning benchmarks for Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 MiniLeader
GPQA Diamond76.3%74.5%Claude Opus 4.1
MMMU Pro (Vals AI)77.5%79.7%o4 Mini
GPQA Diamond (Artificial Analysis run)Not measured78.4%Only o4 Mini measured
Humanity's Last Exam (Artificial Analysis run)Not measured16.5%Only o4 Mini measured
GPQA Diamond (Epoch AI run)77.3%79.6%o4 Mini
ARC-AGINot measured58.7%Only o4 Mini measured
ARC-AGI-2Not measured6.1%Only o4 Mini measured
SimpleBench60.0%38.7%Claude Opus 4.1
Chess puzzlesNot measured22.0%Only o4 Mini measured
Mystery game puzzles21.0%5.0%Claude Opus 4.1
EBR-bench7.9%Not measuredOnly Claude Opus 4.1 measured
VPCT35.0%57.5%o4 Mini
LMArena Text: hard prompts14421351Claude Opus 4.1
LMArena Text: expert14381343Claude Opus 4.1
LMArena Text: hard prompts in English14511366Claude Opus 4.1
LMArena Vision: diagramsNot measured1197Only o4 Mini measured
LMArena Vision: homeworkNot measured1234Only o4 Mini measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index44
Math benchmarks for Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 MiniLeader
AIME78.2%83.7%o4 Mini
MATH 500 (Vals AI)95.4%94.2%Claude Opus 4.1
MGSM (Vals AI)94.4%93.4%Claude Opus 4.1
AA Math IndexNot measured90.7Only o4 Mini measured
AIME 2025 (Artificial Analysis run)Not measured90.7%Only o4 Mini measured
OTIS Mock AIME68.9%81.7%o4 Mini
FrontierMath, tiers 1 to 312.6%36.1%o4 Mini
FrontierMath, tier 42.4%4.9%o4 Mini
MATH level 5Not measured97.8%Only o4 Mini measured
LMArena Text: math14311389Claude Opus 4.1
LMArena Text: mathematical work14341379Claude Opus 4.1
Neither model has a result on the other 2 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index73
Knowledge benchmarks for Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 MiniLeader
MMLU Pro87.9%80.6%Claude Opus 4.1
LegalBench (Vals AI)83.5%79.2%Claude Opus 4.1
CorpFin (Vals AI)Not measured59.0%Only o4 Mini measured
TaxEval (Vals AI)73.7%74.8%o4 Mini
MortgageTax (Vals AI)61.1%64.8%o4 Mini
MedQA (Vals AI)93.6%96.0%o4 Mini
MedCode (Vals AI)47.2%33.8%Claude Opus 4.1
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: science14221354Claude Opus 4.1
LMArena Text: medicine and healthcare14161361Claude Opus 4.1
LMArena Text: legal and government14211350Claude Opus 4.1
LMArena Text: business and finance14061325Claude Opus 4.1
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 MiniLeader
Design Arena: websites1177985Claude Opus 4.1
Design Arena: UI components1164983Claude Opus 4.1
Design Arena: game dev11721004Claude Opus 4.1
Design Arena: data viz1166990Claude Opus 4.1
Design Arena: 3D1153854Claude Opus 4.1
Design Arena: all code categories1171977Claude Opus 4.1
Design Arena: SVG1152Not measuredOnly Claude Opus 4.1 measured
Design Arena: ASCII art1167Not measuredOnly Claude Opus 4.1 measured
Neither model has a result on the other 1 board here
GeneralLike-for-likePublic boards, shown as published, kept out of the index211
General benchmarks for Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 MiniLeader
SAGE (Vals AI)31.4%41.1%o4 Mini
MedScribe (Vals AI)73.9%69.1%Claude Opus 4.1
IFBenchNot measured68.7%Only o4 Mini measured
Long context reasoning (AA-LCR)Not measured61.0%Only o4 Mini measured
DTBench80.0%77.6%Claude Opus 4.1
LMCA37.1%26.5%Claude Opus 4.1
Fiction.LiveBenchNot measured77.8%Only o4 Mini measured
Creative writing (Lech Mazur)84.7%75.0%Claude Opus 4.1
LMArena Text14191353Claude Opus 4.1
LMArena Text: instruction following14351320Claude Opus 4.1
LMArena Text: creative writing14121294Claude Opus 4.1
LMArena VisionNot measured1194Only o4 Mini measured
LMArena Text: English14331367Claude Opus 4.1
LMArena Text: non-English14051337Claude Opus 4.1
LMArena Text: Chinese14271354Claude Opus 4.1
LMArena Text: German14131336Claude Opus 4.1
LMArena Text: Japanese13771308Claude Opus 4.1
LMArena Text: Korean13811312Claude Opus 4.1
LMArena Text: French14331364Claude Opus 4.1
LMArena Text: Spanish14481346Claude Opus 4.1
LMArena Text: Russian14221334Claude Opus 4.1
LMArena Text: Polish14131358Claude Opus 4.1
LMArena Text: multi-turn14441350Claude Opus 4.1
LMArena Text: longer queries14551315Claude Opus 4.1
LMArena Text: writing and language14181316Claude Opus 4.1
LMArena Text: entertainment and media13981308Claude Opus 4.1
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 Claude Opus 4.1 and o4 Mini
BenchmarkClaude Opus 4.1o4 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

Claude Opus 4.1$0.052Fits in one request
o4 Mini$0.0033Fits in one request

o4 Mini costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.1$0.975Fits in one request
o4 Mini$0.068Fits in one request

o4 Mini costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.1$3.75Exceeds the context window
o4 Mini$0.264Exceeds the context window

o4 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 Claude Opus 4.1 and o4 Mini
SpecificationAnthropic Claude Opus 4.1OpenAI o4 Mini
MakerAnthropicOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedAugust 5, 2025April 16, 2025
Context window200K200K
Input $/Mtok$15.00$1.10
Output $/Mtok$75.00$4.40
Coding index27.268.6
Independent measurements behind it12
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 4.1 better than o4 Mini for coding?

Pick o4 Mini for coding: it scores 68.6 on the Vibe Coding Index against 27.2 for Claude Opus 4.1. Pick Claude Opus 4.1 when what matters is LMArena Text: coding or LMArena Text: software and IT, where it leads.

Which is cheaper, Claude Opus 4.1 or o4 Mini?

Claude Opus 4.1 costs $15.00 per million input tokens and $75.00 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, Claude Opus 4.1 or o4 Mini?

Neither: both take 200K tokens.

How many benchmarks is the Claude Opus 4.1 vs o4 Mini comparison based on?

62 benchmarks have a result for both models as of October 21, 2026. Claude Opus 4.1's coding index rests on 1 independent benchmark and o4 Mini's on 2. Where only one model has a result, the page says so instead of naming a winner.

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