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Claude Opus 4.1 vs Gemma 4 31B

Claude Opus 4.1 leads Gemma 4 31B on the Artificial Analysis Intelligence Index, 22.8 to 14.7, and Gemma 4 31B costs 187.5x less per output token ($0.40 vs $75.00 per million). Updated October 22, 2026; 38 benchmarks have a result for both.

Replace Claude Opus 4.1 Replace Gemma 4 31B
Claude Opus 4.1Anthropic
Coding
No data
Overall
50.2
Output $/M
$75.00
9
Gemma 4 31BGoogle
Coding
39.0
Overall
42.1
Output $/M
$0.40
29
vs boards won of 38 shared

Claude Opus 4.1 or Gemma 4 31B: which to pick

Only Gemma 4 31B has a coding score, 39.0 on the Vibe Coding Index; Claude Opus 4.1 has none, so the two cannot be ranked on coding.

Pick Claude Opus 4.1 for work measured by LMArena WebDev or LMArena Text: coding, where it leads.

Model AClaude Opus 4.1AnthropicNot benchmarked1 independent benchmarkNo cost per solved taskModel BGemma 4 31BGoogle39.0/1002 independent benchmarksNo cost per solved task
Shared results
38
Claude Opus 4.1 only
35
Gemma 4 31B only
33
Like-for-like categories
6 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
Claude Opus 4.1 not benchmarked, Gemma 4 31B 39.0 from 2 benchmarks.
Widest category
Math, 5.0 points apart on average over 3 shared benchmarks.
Widest single gap
SAGE (Vals AI): Claude Opus 4.1 31.4% against Gemma 4 31B 55.0%, 23.7 points apart on a 0 to 100 scale.
Output price
Claude Opus 4.1 $75.00 against Gemma 4 31B $0.40 per million output tokens, 187.5x apart.
Context window
Claude Opus 4.1 takes 200K tokens, Gemma 4 31B 262K.

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 4.1BarsGemma 4 31BTies
Coding33
Intelligence20
Reasoning13
Math03
Knowledge06
General314
All shared boards929
CodingLike-for-likeSix of these boards feed the Vibe Coding Index33
Coding benchmarks for Claude Opus 4.1 and Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
LiveBench codingNot measured49.0%Only Gemma 4 31B measured
LMArena WebDev13901367Claude Opus 4.1
AA Coding IndexNot measured43.4Only Gemma 4 31B measured
LiveCodeBench (Vals AI)66.5%Not measuredOnly Claude Opus 4.1 measured
SciCodeNot measured45.5%Only Gemma 4 31B measured
Terminal-Bench Hard (Artificial Analysis run)Not measured36.4%Only Gemma 4 31B measured
Terminal-Bench38.0%Not measuredOnly Claude Opus 4.1 measured
WeirdML45.9%52.3%Gemma 4 31B
Cybench42.0%Not measuredOnly Claude Opus 4.1 measured
ALE-BenchNot measured925.5Only Gemma 4 31B measured
LMArena Text: coding14791459Claude Opus 4.1
LMArena Text: software and IT14561463Gemma 4 31B
LMArena WebDev: ReactNot measured1359Only Gemma 4 31B measured
LMArena WebDev: HTML13991380Claude Opus 4.1
SciCode4.6%8.9%Gemma 4 31B
Neither model has a result on the other 24 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Opus 4.1 and Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
AA Intelligence Index22.814.7Claude Opus 4.1
Epoch Capabilities Index144.1143.0Claude Opus 4.1
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
Agentic work benchmarks for Claude Opus 4.1 and Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
AA Agentic IndexNot measured4.2Only Gemma 4 31B measured
LiveBench researchNot measured44.4%Only Gemma 4 31B measured
LiveBench browserNot measured4.0%Only Gemma 4 31B measured
LiveBench long agenticNot measured13.3%Only Gemma 4 31B measured
τ²-Bench TelecomNot measured65.5%Only Gemma 4 31B measured
METR time horizons66.8%Not measuredOnly Claude Opus 4.1 measured
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 33 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index13
Reasoning benchmarks for Claude Opus 4.1 and Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
GPQA Diamond76.3%Not measuredOnly Claude Opus 4.1 measured
LiveBench reasoningNot measured68.3%Only Gemma 4 31B measured
MMMU Pro (Vals AI)77.5%Not measuredOnly Claude Opus 4.1 measured
GPQA Diamond (Artificial Analysis run)Not measured85.7%Only Gemma 4 31B measured
Humanity's Last Exam (Artificial Analysis run)Not measured23.6%Only Gemma 4 31B measured
GPQA Diamond (Epoch AI run)77.3%75.8%Claude Opus 4.1
SimpleBench60.0%Not measuredOnly Claude Opus 4.1 measured
Mystery game puzzles21.0%Not measuredOnly Claude Opus 4.1 measured
EBR-bench7.9%Not measuredOnly Claude Opus 4.1 measured
VPCT35.0%Not measuredOnly Claude Opus 4.1 measured
LMArena Text: hard prompts14421448Gemma 4 31B
LMArena Text: expert14381464Gemma 4 31B
LMArena Text: hard prompts in English14511456Gemma 4 31B
LMArena Vision: diagramsNot measured1283Only Gemma 4 31B measured
LMArena Vision: homeworkNot measured1310Only Gemma 4 31B measured
Kagi LLM BenchmarkNot measured63.5%Only Gemma 4 31B measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index03
Math benchmarks for Claude Opus 4.1 and Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
AIME78.2%Not measuredOnly Claude Opus 4.1 measured
MATH 500 (Vals AI)95.4%Not measuredOnly Claude Opus 4.1 measured
MGSM (Vals AI)94.4%Not measuredOnly Claude Opus 4.1 measured
OTIS Mock AIME68.9%73.3%Gemma 4 31B
FrontierMath, tiers 1 to 312.6%Not measuredOnly Claude Opus 4.1 measured
FrontierMath, tier 42.4%Not measuredOnly Claude Opus 4.1 measured
LMArena Text: math14311463Gemma 4 31B
LMArena Text: mathematical work14341465Gemma 4 31B
Neither model has a result on the other 5 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index06
Knowledge benchmarks for Claude Opus 4.1 and Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
MMLU Pro87.9%Not measuredOnly Claude Opus 4.1 measured
LegalBench (Vals AI)83.5%Not measuredOnly Claude Opus 4.1 measured
CaseLaw (Vals AI)Not measured52.6%Only Gemma 4 31B measured
TaxEval (Vals AI)73.7%Not measuredOnly Claude Opus 4.1 measured
MortgageTax (Vals AI)61.1%61.4%Gemma 4 31B
MedQA (Vals AI)93.6%Not measuredOnly Claude Opus 4.1 measured
MedCode (Vals AI)47.2%Not measuredOnly Claude Opus 4.1 measured
SimpleQA VerifiedNot measured10.4%Only Gemma 4 31B measured
LMArena Text: science14221457Gemma 4 31B
LMArena Text: medicine and healthcare14161451Gemma 4 31B
LMArena Text: legal and government14211438Gemma 4 31B
LMArena Text: business and finance14061430Gemma 4 31B
FACTS Benchmark Suite40.4%45.3%Gemma 4 31B
Neither model has a result on the other 5 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Web design benchmarks for Claude Opus 4.1 and Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
Design Arena: websites1176Not measuredOnly Claude Opus 4.1 measured
Design Arena: UI components1162Not measuredOnly Claude Opus 4.1 measured
Design Arena: game dev1171Not measuredOnly Claude Opus 4.1 measured
Design Arena: data viz1166Not measuredOnly Claude Opus 4.1 measured
Design Arena: 3D1152Not measuredOnly Claude Opus 4.1 measured
Design Arena: all code categories1170Not measuredOnly Claude Opus 4.1 measured
Design Arena: SVG1152Not measuredOnly Claude Opus 4.1 measured
Design Arena: ASCII art1167Not measuredOnly Claude Opus 4.1 measured
LiveBench designNot measured58.4%Only Gemma 4 31B measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index314
General benchmarks for Claude Opus 4.1 and Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
LiveBench data analysisNot measured53.3%Only Gemma 4 31B measured
SAGE (Vals AI)31.4%55.0%Gemma 4 31B
MedScribe (Vals AI)73.9%Not measuredOnly Claude Opus 4.1 measured
IFBenchNot measured75.6%Only Gemma 4 31B measured
Long context reasoning (AA-LCR)Not measured69.7%Only Gemma 4 31B measured
DTBench80.0%82.7%Gemma 4 31B
LMCA37.1%39.3%Gemma 4 31B
Creative writing (Lech Mazur)84.7%Not measuredOnly Claude Opus 4.1 measured
Surface Evolver BenchNot measured30.6%Only Gemma 4 31B measured
LMArena Text14191443Gemma 4 31B
LMArena Text: instruction following14351433Claude Opus 4.1
LMArena Text: creative writing14121417Gemma 4 31B
LMArena VisionNot measured1276Only Gemma 4 31B measured
LMArena Text: English14331451Gemma 4 31B
LMArena Text: non-English14051430Gemma 4 31B
LMArena Text: Chinese14271475Gemma 4 31B
LMArena Text: German1413Not measuredOnly Claude Opus 4.1 measured
LMArena Text: Japanese1377Not measuredOnly Claude Opus 4.1 measured
LMArena Text: Korean1381Not measuredOnly Claude Opus 4.1 measured
LMArena Text: French14331436Gemma 4 31B
LMArena Text: Spanish14481442Claude Opus 4.1
LMArena Text: Russian14221460Gemma 4 31B
LMArena Text: Polish14131433Gemma 4 31B
LMArena Text: multi-turn14441452Gemma 4 31B
LMArena Text: longer queries14551446Claude Opus 4.1
LMArena Text: writing and language14181432Gemma 4 31B
LMArena Text: entertainment and media13981405Gemma 4 31B
LMArena Vision: EnglishNot measured1271Only Gemma 4 31B measured
LMArena Vision: ChineseNot measured1326Only Gemma 4 31B measured
LMArena Vision: reading textNot measured1282Only Gemma 4 31B measured
LMArena Vision: humorNot measured1280Only Gemma 4 31B measured
LMArena Vision: captioningNot measured1218Only Gemma 4 31B measured
LMArena Vision: recognizing thingsNot measured1226Only Gemma 4 31B measured
LMArena Vision: creative writingNot measured1285Only Gemma 4 31B measured
LMArena DocumentNot measured1425Only Gemma 4 31B measured
Neither model has a result on the other 11 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 Gemma 4 31B
BenchmarkClaude Opus 4.1Gemma 4 31BLeader
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
Gemma 4 31B$0.0003Fits in one request

Gemma 4 31B costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.1$0.975Fits in one request
Gemma 4 31B$0.0082Fits in one request

Gemma 4 31B costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.1$3.75Exceeds the context window
Gemma 4 31B$0.032Fits in one request

Gemma 4 31B 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 Gemma 4 31B
SpecificationAnthropic Claude Opus 4.1Google Gemma 4 31B
MakerAnthropicGoogle
WeightsNo public weights listedOpen weights
ReleasedAugust 5, 2025April 2, 2026
Context window200K262K
Input $/Mtok$15.00$0.14
Output $/Mtok$75.00$0.40
Coding indexNot benchmarked39.0
Independent measurements behind it12
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Opus 4.1 better than Gemma 4 31B for coding?

Only Gemma 4 31B has a coding score, 39.0 on the Vibe Coding Index; Claude Opus 4.1 has none, so the two cannot be ranked on coding. Pick Claude Opus 4.1 for work measured by LMArena WebDev or LMArena Text: coding, where it leads.

Which is cheaper, Claude Opus 4.1 or Gemma 4 31B?

Claude Opus 4.1 costs $15.00 per million input tokens and $75.00 per million output tokens; Gemma 4 31B costs $0.14 and $0.40. Cost per solved task is known for neither of them.

Which has the bigger context window, Claude Opus 4.1 or Gemma 4 31B?

Gemma 4 31B, with 262K tokens against 200K.

How many benchmarks is the Claude Opus 4.1 vs Gemma 4 31B comparison based on?

38 benchmarks have a result for both models as of October 22, 2026. Claude Opus 4.1's coding index rests on 1 independent benchmark and Gemma 4 31B's on 2. Where only one model has a result, the page says so instead of naming a winner.

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