Claude Opus 4.1 vs Gemma 4 26B A4B

Updated October 21, 2026. 33 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 Gemma 4 26B A4B

Claude Opus 4.1Anthropic

Coding: 27.2
Overall: 22.8
Output $/M: $75.00

Gemma 4 26B A4BGoogle

Coding: 22.8
Overall: 16.7
Output $/M: $0.255

vs boards won of 33 shared

Decision reading

Pick Claude Opus 4.1 for coding: it scores 27.2 on the Vibe Coding Index against 22.8 for Gemma 4 26B A4B.

Pick Gemma 4 26B A4B when output tokens cost 294.1x less, or when the context window is larger, 262K against 200K tokens.

Model AClaude Opus 4.1Anthropic27.2/1001 independent benchmarkNo cost per solved task Model BGemma 4 26B A4BGoogle22.8/1001 independent benchmarkNo cost per solved task

333821

Shared results: 33
Claude Opus 4.1 only: 38
Gemma 4 26B A4B only: 21
Like-for-like categories: 6 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.

Coding
Vibe Coding Index, four public coding benchmarks
Claude Opus 4.1
Claude Opus 4.1 scores 27.2 against 22.8.
One benchmark behind each score
Intelligence
AA Intelligence Index
Claude Opus 4.1
Claude Opus 4.1 leads, 22.8 against 16.7.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Gemma 4 26B A4B has a AA Agentic Index result, 2.9.
Directional only
Reasoning
GPQA Diamond
No call
Only Claude Opus 4.1 has a GPQA Diamond result, 76.3%.
Directional only
Math
AIME
No call
Only Claude Opus 4.1 has a AIME result, 78.2%.
Directional only
Knowledge
MMLU Pro
No call
Only Claude Opus 4.1 has a MMLU Pro result, 87.9%.
Directional only
Web design
Design Arena: websites
No call
Only Claude Opus 4.1 has a Design Arena: websites result, 1177.
Directional only
Long documents
Listed context window
Gemma 4 26B A4B
Gemma 4 26B A4B takes 262K tokens against 200K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Gemma 4 26B A4B
Claude Opus 4.1 $0.052, Gemma 4 26B A4B $0.0002 per turn.
List prices

At a glance

Coding index: Claude Opus 4.1 27.2 from 1 benchmark, Gemma 4 26B A4B 22.8 from 1 benchmark.
Widest category: Math, 8.9 points apart on average over 3 shared benchmarks.
Widest single gap: OTIS Mock AIME: Claude Opus 4.1 68.9% against Gemma 4 26B A4B 82.2%, 13.3 points apart on a 0 to 100 scale.
Output price: Claude Opus 4.1 $75.00 against Gemma 4 26B A4B $0.255 per million output tokens, 294.1x apart.
Context window: Claude Opus 4.1 takes 200K tokens, Gemma 4 26B A4B 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
Category	Claude Opus 4.1	Gemma 4 26B A4B
Coding	5	0
Intelligence	2	0
Reasoning	3	1
Math	0	3
Knowledge	0	4
General	8	7
All shared boards	18	15

CodingLike-for-likeFour of these boards feed the Vibe Coding Index50

Coding benchmarks for Claude Opus 4.1 and Gemma 4 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
LMArena WebDev	1390	1360	Claude Opus 4.1
AA Coding Index	Not measured	39.3	Only Gemma 4 26B A4B measured
LiveCodeBench (Vals AI)	66.5%	Not measured	Only Claude Opus 4.1 measured
SciCode	Not measured	40.0%	Only Gemma 4 26B A4B measured
Terminal-Bench Hard (Artificial Analysis run)	Not measured	25.0%	Only Gemma 4 26B A4B measured
Terminal-Bench	38.0%	Not measured	Only Claude Opus 4.1 measured
WeirdML	45.9%	35.2%	Claude Opus 4.1
Cybench	42.0%	Not measured	Only Claude Opus 4.1 measured
ALE-Bench	Not measured	927.2	Only Gemma 4 26B A4B measured
LMArena Text: coding	1479	1446	Claude Opus 4.1
LMArena Text: software and IT	1456	1454	Claude Opus 4.1
LMArena WebDev: React	Not measured	1351	Only Gemma 4 26B A4B measured
LMArena WebDev: HTML	1399	1362	Claude Opus 4.1
Neither model has a result on the other 25 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20

Intelligence benchmarks for Claude Opus 4.1 and Gemma 4 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
AA Intelligence Index	22.8	16.7	Claude Opus 4.1
Epoch Capabilities Index	144.1	141.9	Claude Opus 4.1

Agentic workDirectional onlyPublic boards, shown as published, kept out of the index5 boards, none shared

Agentic work benchmarks for Claude Opus 4.1 and Gemma 4 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
AA Agentic Index	Not measured	2.9	Only Gemma 4 26B A4B measured
τ²-Bench Telecom	Not measured	43.6%	Only Gemma 4 26B A4B measured
METR time horizons	66.8%	Not measured	Only Claude Opus 4.1 measured
GDPval	43.6%	Not measured	Only Claude Opus 4.1 measured
DeepResearch Bench	48.3%	Not measured	Only Claude Opus 4.1 measured
Neither model has a result on the other 34 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index31

Reasoning benchmarks for Claude Opus 4.1 and Gemma 4 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
GPQA Diamond	76.3%	Not measured	Only Claude Opus 4.1 measured
MMMU Pro (Vals AI)	77.5%	Not measured	Only Claude Opus 4.1 measured
GPQA Diamond (Artificial Analysis run)	Not measured	79.2%	Only Gemma 4 26B A4B measured
Humanity's Last Exam (Artificial Analysis run)	Not measured	19.3%	Only Gemma 4 26B A4B measured
GPQA Diamond (Epoch AI run)	77.3%	73.2%	Claude Opus 4.1
SimpleBench	60.0%	Not measured	Only Claude Opus 4.1 measured
Mystery game puzzles	21.0%	Not measured	Only Claude Opus 4.1 measured
EBR-bench	7.9%	Not measured	Only Claude Opus 4.1 measured
VPCT	35.0%	Not measured	Only Claude Opus 4.1 measured
LMArena Text: hard prompts	1442	1438	Claude Opus 4.1
LMArena Text: expert	1438	1447	Gemma 4 26B A4B
LMArena Text: hard prompts in English	1451	1448	Claude Opus 4.1
LMArena Vision: diagrams	Not measured	1264	Only Gemma 4 26B A4B measured
LMArena Vision: homework	Not measured	1293	Only Gemma 4 26B A4B measured
Neither model has a result on the other 7 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index03

Math benchmarks for Claude Opus 4.1 and Gemma 4 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
AIME	78.2%	Not measured	Only Claude Opus 4.1 measured
MATH 500 (Vals AI)	95.4%	Not measured	Only Claude Opus 4.1 measured
MGSM (Vals AI)	94.4%	Not measured	Only Claude Opus 4.1 measured
OTIS Mock AIME	68.9%	82.2%	Gemma 4 26B A4B
FrontierMath, tiers 1 to 3	12.6%	Not measured	Only Claude Opus 4.1 measured
FrontierMath, tier 4	2.4%	Not measured	Only Claude Opus 4.1 measured
LMArena Text: math	1431	1470	Gemma 4 26B A4B
LMArena Text: mathematical work	1434	1475	Gemma 4 26B A4B
Neither model has a result on the other 5 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04

Knowledge benchmarks for Claude Opus 4.1 and Gemma 4 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
MMLU Pro	87.9%	Not measured	Only Claude Opus 4.1 measured
LegalBench (Vals AI)	83.5%	Not measured	Only Claude Opus 4.1 measured
TaxEval (Vals AI)	73.7%	Not measured	Only Claude Opus 4.1 measured
MortgageTax (Vals AI)	61.1%	Not measured	Only Claude Opus 4.1 measured
MedQA (Vals AI)	93.6%	Not measured	Only Claude Opus 4.1 measured
MedCode (Vals AI)	47.2%	Not measured	Only Claude Opus 4.1 measured
LMArena Text: science	1422	1446	Gemma 4 26B A4B
LMArena Text: medicine and healthcare	1416	1428	Gemma 4 26B A4B
LMArena Text: legal and government	1421	1457	Gemma 4 26B A4B
LMArena Text: business and finance	1406	1429	Gemma 4 26B A4B
Neither model has a result on the other 7 boards here

Web designDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared

Web design benchmarks for Claude Opus 4.1 and Gemma 4 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
Design Arena: websites	1177	Not measured	Only Claude Opus 4.1 measured
Design Arena: UI components	1164	Not measured	Only Claude Opus 4.1 measured
Design Arena: game dev	1172	Not measured	Only Claude Opus 4.1 measured
Design Arena: data viz	1166	Not measured	Only Claude Opus 4.1 measured
Design Arena: 3D	1153	Not measured	Only Claude Opus 4.1 measured
Design Arena: all code categories	1171	Not measured	Only Claude Opus 4.1 measured
Design Arena: SVG	1152	Not measured	Only Claude Opus 4.1 measured
Design Arena: ASCII art	1167	Not measured	Only 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 index87

General benchmarks for Claude Opus 4.1 and Gemma 4 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
SAGE (Vals AI)	31.4%	Not measured	Only Claude Opus 4.1 measured
MedScribe (Vals AI)	73.9%	Not measured	Only Claude Opus 4.1 measured
IFBench	Not measured	72.4%	Only Gemma 4 26B A4B measured
Long context reasoning (AA-LCR)	Not measured	65.7%	Only Gemma 4 26B A4B measured
DTBench	80.0%	74.9%	Claude Opus 4.1
LMCA	37.1%	29.7%	Claude Opus 4.1
Creative writing (Lech Mazur)	84.7%	Not measured	Only Claude Opus 4.1 measured
LMArena Text	1419	1434	Gemma 4 26B A4B
LMArena Text: instruction following	1435	1420	Claude Opus 4.1
LMArena Text: creative writing	1412	1400	Claude Opus 4.1
LMArena Vision	Not measured	1260	Only Gemma 4 26B A4B measured
LMArena Text: English	1433	1444	Gemma 4 26B A4B
LMArena Text: non-English	1405	1421	Gemma 4 26B A4B
LMArena Text: Chinese	1427	1495	Gemma 4 26B A4B
LMArena Text: German	1413	Not measured	Only Claude Opus 4.1 measured
LMArena Text: Japanese	1377	Not measured	Only Claude Opus 4.1 measured
LMArena Text: Korean	1381	Not measured	Only Claude Opus 4.1 measured
LMArena Text: French	1433	1460	Gemma 4 26B A4B
LMArena Text: Spanish	1448	1415	Claude Opus 4.1
LMArena Text: Russian	1422	1434	Gemma 4 26B A4B
LMArena Text: Polish	1413	Not measured	Only Claude Opus 4.1 measured
LMArena Text: multi-turn	1444	1441	Claude Opus 4.1
LMArena Text: longer queries	1455	1427	Claude Opus 4.1
LMArena Text: writing and language	1418	1405	Claude Opus 4.1
LMArena Text: entertainment and media	1398	1403	Gemma 4 26B A4B
LMArena Vision: English	Not measured	1256	Only Gemma 4 26B A4B measured
LMArena Vision: Chinese	Not measured	1312	Only Gemma 4 26B A4B measured
LMArena Vision: reading text	Not measured	1268	Only Gemma 4 26B A4B measured
LMArena Vision: humor	Not measured	1272	Only Gemma 4 26B A4B measured
LMArena Vision: captioning	Not measured	1297	Only Gemma 4 26B A4B measured
LMArena Vision: recognizing things	Not measured	1191	Only Gemma 4 26B A4B measured
LMArena Vision: creative writing	Not measured	1256	Only Gemma 4 26B A4B measured
Neither model has a result on the other 14 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 26B A4B
Benchmark	Claude Opus 4.1	Gemma 4 26B A4B	Leader
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 26B A4B$0.0002Fits in one request

Gemma 4 26B A4B costs less

Repository review

50K input + 3K output tokens

Claude Opus 4.1$0.975Fits in one request

Gemma 4 26B A4B$0.0046Fits in one request

Gemma 4 26B A4B costs less

Agent loop

200K input + 10K output tokens

Claude Opus 4.1$3.75Exceeds the context window

Gemma 4 26B A4B$0.018Fits in one request

Gemma 4 26B A4B 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 26B A4B
Specification	Anthropic Claude Opus 4.1	Google Gemma 4 26B A4B
Maker	Anthropic	Google
Weights	No public weights listed	Open weights
Released	August 5, 2025	April 3, 2026
Context window	200K	262K
Input $/Mtok	$15.00	$0.0765
Output $/Mtok	$75.00	$0.255
Coding index	27.2	22.8
Independent measurements behind it	1	1
Cost per solved task	Not computable	Not computable
Source	OpenRouter listing	OpenRouter listing

Questions

Is Claude Opus 4.1 better than Gemma 4 26B A4B for coding?

Pick Claude Opus 4.1 for coding: it scores 27.2 on the Vibe Coding Index against 22.8 for Gemma 4 26B A4B. Pick Gemma 4 26B A4B when output tokens cost 294.1x less, or when the context window is larger, 262K against 200K tokens.

Which is cheaper, Claude Opus 4.1 or Gemma 4 26B A4B?

Claude Opus 4.1 costs $15.00 per million input tokens and $75.00 per million output tokens; Gemma 4 26B A4B costs $0.0765 and $0.255. Cost per solved task is known for neither of them.

Which has the bigger context window, Claude Opus 4.1 or Gemma 4 26B A4B?

Gemma 4 26B A4B, with 262K tokens against 200K.

How many benchmarks is the Claude Opus 4.1 vs Gemma 4 26B A4B comparison based on?

33 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 Gemma 4 26B A4B's on 1. Where only one model has a result, the page says so instead of naming a winner.

Decision reading

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Math

Knowledge

Web design

Long documents

Everyday cost

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

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