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Gemma 4 26B A4B vs GPT-5

GPT-5 leads Gemma 4 26B A4B on the Artificial Analysis Intelligence Index, 23.0 to 16.7, and Gemma 4 26B A4B costs 16.7x less per output token ($0.60 vs $10.00 per million). Updated October 22, 2026; 52 benchmarks have a result for both.

Replace Gemma 4 26B A4B Replace GPT-5
Gemma 4 26B A4BGoogle
Coding
No data
Overall
54.7
Output $/M
$0.60
35
GPT-5OpenAI
Coding
38.8
Overall
51.5
Output $/M
$10.00
17
vs boards won of 52 shared

Gemma 4 26B A4B or GPT-5: which to pick

Only GPT-5 has a coding score, 38.8 on the Vibe Coding Index; Gemma 4 26B A4B has none, so the two cannot be ranked on coding.

Pick Gemma 4 26B A4B for output tokens 16.7x cheaper ($0.60 vs $10.00 per million) and work measured by AA Coding Index or ALE-Bench, where it leads.

Model AGemma 4 26B A4BGoogleNot benchmarked1 independent benchmarkNo cost per solved taskModel BGPT-5OpenAI38.8/1003 independent benchmarks$0.39 per solved task
Shared results
52
Gemma 4 26B A4B only
3
GPT-5 only
61
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
Gemma 4 26B A4B not benchmarked, GPT-5 38.8 from 3 benchmarks.
Widest category
Agentic work, 43.0 points apart on average over 1 shared benchmark.
Widest single gap
τ²-Bench Telecom: Gemma 4 26B A4B 43.6% against GPT-5 86.5%, 43.0 points apart on a 0 to 100 scale.
Output price
Gemma 4 26B A4B $0.60 against GPT-5 $10.00 per million output tokens, 16.7x apart.
Context window
Gemma 4 26B A4B takes 262K tokens, GPT-5 400K.

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
CategoryGemma 4 26B A4BBarsGPT-5Ties
Coding44
Intelligence02
Agentic work01
Reasoning53
Math21
Knowledge41
General205
All shared boards3517
CodingLike-for-likeSix of these boards feed the Vibe Coding Index44
Coding benchmarks for Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
Aider polyglotNot measured88.0%Only GPT-5 measured
SWE-bench VerifiedNot measured74.4%Only GPT-5 measured
LMArena WebDev13601418GPT-5
AA Coding Index39.337.8Gemma 4 26B A4B
LiveCodeBench (Vals AI)Not measured85.9%Only GPT-5 measured
SWE-bench Verified (Vals AI)Not measured69.0%Only GPT-5 measured
Vibe Code Bench (Vals AI)Not measured20.1%Only GPT-5 measured
LiveCodeBench (Artificial Analysis run)Not measured84.6%Only GPT-5 measured
SciCode40.0%Not measuredOnly Gemma 4 26B A4B measured
Terminal-Bench Hard (Artificial Analysis run)25.0%37.9%GPT-5
Terminal-BenchNot measured49.6%Only GPT-5 measured
GSO-BenchNot measured6.9%Only GPT-5 measured
WeirdML35.2%60.7%GPT-5
ALE-Bench927.2807.6Gemma 4 26B A4B
LMArena Text: coding14461436Gemma 4 26B A4B
LMArena Text: software and IT14541420Gemma 4 26B A4B
LMArena WebDev: React1351Not measuredOnly Gemma 4 26B A4B measured
LMArena WebDev: HTML13621427GPT-5
SciCodeNot measured0.0%Only GPT-5 measured
Neither model has a result on the other 20 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
AA Intelligence Index16.723.0GPT-5
Epoch Capabilities Index141.9150.0GPT-5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
AA Agentic Index2.9Not measuredOnly Gemma 4 26B A4B measured
τ²-Bench Telecom43.6%86.5%GPT-5
METR time horizonsNot measured69.6%Only GPT-5 measured
Remote Labor IndexNot measured1.7%Only GPT-5 measured
GDPvalNot measured34.8%Only GPT-5 measured
BALROGNot measured32.8%Only GPT-5 measured
DeepResearch BenchNot measured49.6%Only GPT-5 measured
BrowseComp-PlusNot measured80.0%Only GPT-5 measured
Neither model has a result on the other 33 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index53
Reasoning benchmarks for Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
GPQA DiamondNot measured85.6%Only GPT-5 measured
MMMU Pro (Vals AI)Not measured81.5%Only GPT-5 measured
GPQA Diamond (Artificial Analysis run)79.2%85.4%GPT-5
Humanity's Last Exam (Artificial Analysis run)19.3%28.5%GPT-5
GPQA Diamond (Epoch AI run)73.2%86.2%GPT-5
ARC-AGINot measured65.7%Only GPT-5 measured
ARC-AGI-2Not measured9.9%Only GPT-5 measured
SimpleBenchNot measured56.7%Only GPT-5 measured
Chess puzzlesNot measured36.0%Only GPT-5 measured
Mystery game puzzlesNot measured23.0%Only GPT-5 measured
EBR-benchNot measured12.7%Only GPT-5 measured
VPCTNot measured66.0%Only GPT-5 measured
LMArena Text: hard prompts14381415Gemma 4 26B A4B
LMArena Text: expert14471419Gemma 4 26B A4B
LMArena Text: hard prompts in English14481419Gemma 4 26B A4B
LMArena Vision: diagrams12641252Gemma 4 26B A4B
LMArena Vision: homework12931278Gemma 4 26B A4B
Kagi LLM BenchmarkNot measured72.7%Only 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 index21
Math benchmarks for Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
AIMENot measured93.4%Only GPT-5 measured
MATH 500 (Vals AI)Not measured96.0%Only GPT-5 measured
MGSM (Vals AI)Not measured92.8%Only GPT-5 measured
AA Math IndexNot measured94.3Only GPT-5 measured
AIME 2025 (Artificial Analysis run)Not measured94.3%Only GPT-5 measured
OTIS Mock AIME82.2%91.4%GPT-5
FrontierMath, tiers 1 to 3Not measured55.4%Only GPT-5 measured
FrontierMath, tier 4Not measured22.0%Only GPT-5 measured
ProofBenchNot measured18.0%Only GPT-5 measured
MATH level 5Not measured98.1%Only GPT-5 measured
LMArena Text: math14701407Gemma 4 26B A4B
LMArena Text: mathematical work14751405Gemma 4 26B A4B
Neither model has a result on the other 1 board here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index41
Knowledge benchmarks for Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
MMLU ProNot measured86.5%Only GPT-5 measured
LegalBench (Vals AI)Not measured86.0%Only GPT-5 measured
CaseLaw (Vals AI)Not measured66.5%Only GPT-5 measured
CorpFin (Vals AI)Not measured61.1%Only GPT-5 measured
TaxEval (Vals AI)Not measured73.4%Only GPT-5 measured
MortgageTax (Vals AI)Not measured65.5%Only GPT-5 measured
MedQA (Vals AI)Not measured96.3%Only GPT-5 measured
MedCode (Vals AI)Not measured49.6%Only GPT-5 measured
MMLU Pro (Artificial Analysis run)Not measured87.1%Only GPT-5 measured
SimpleQA VerifiedNot measured50.1%Only GPT-5 measured
GeoBenchNot measured81.0%Only GPT-5 measured
LMArena Text: science14461416Gemma 4 26B A4B
LMArena Text: medicine and healthcare14281413Gemma 4 26B A4B
LMArena Text: legal and government14571431Gemma 4 26B A4B
LMArena Text: business and finance14291400Gemma 4 26B A4B
FACTS Benchmark Suite42.7%56.5%GPT-5
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 Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
Design Arena: websitesNot measured1184Only GPT-5 measured
Design Arena: UI componentsNot measured1177Only GPT-5 measured
Design Arena: game devNot measured1185Only GPT-5 measured
Design Arena: data vizNot measured1221Only GPT-5 measured
Design Arena: 3DNot measured1055Only GPT-5 measured
Design Arena: all code categoriesNot measured1167Only GPT-5 measured
Design Arena: SVGNot measured1188Only GPT-5 measured
Design Arena: ASCII artNot measured1141Only 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 index205
General benchmarks for Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
SAGE (Vals AI)Not measured43.7%Only GPT-5 measured
MedScribe (Vals AI)Not measured83.7%Only GPT-5 measured
IFBench72.4%73.1%GPT-5
Long context reasoning (AA-LCR)65.7%78.2%GPT-5
DTBench74.9%90.7%GPT-5
LMCA29.7%40.0%GPT-5
Fiction.LiveBenchNot measured97.2%Only GPT-5 measured
Creative writing (Lech Mazur)Not measured86.0%Only GPT-5 measured
LMArena Text14341406Gemma 4 26B A4B
LMArena Text: instruction following14201388Gemma 4 26B A4B
LMArena Text: creative writing14001365Gemma 4 26B A4B
LMArena Vision12601232Gemma 4 26B A4B
LMArena Text: English14441409Gemma 4 26B A4B
LMArena Text: non-English14211397Gemma 4 26B A4B
LMArena Text: Chinese14951422Gemma 4 26B A4B
LMArena Text: GermanNot measured1416Only GPT-5 measured
LMArena Text: JapaneseNot measured1409Only GPT-5 measured
LMArena Text: KoreanNot measured1360Only GPT-5 measured
LMArena Text: French14601409Gemma 4 26B A4B
LMArena Text: Spanish14151399Gemma 4 26B A4B
LMArena Text: Russian14341407Gemma 4 26B A4B
LMArena Text: PolishNot measured1431Only GPT-5 measured
LMArena Text: multi-turn14411426Gemma 4 26B A4B
LMArena Text: longer queries14271399Gemma 4 26B A4B
LMArena Text: writing and language14051384Gemma 4 26B A4B
LMArena Text: entertainment and media14031379Gemma 4 26B A4B
LMArena Vision: English12561231Gemma 4 26B A4B
LMArena Vision: Chinese13121267Gemma 4 26B A4B
LMArena Vision: reading text12681246Gemma 4 26B A4B
LMArena Vision: humor12721219Gemma 4 26B A4B
LMArena Vision: captioning12971212Gemma 4 26B A4B
LMArena Vision: recognizing things11911263GPT-5
LMArena Vision: creative writing12561210Gemma 4 26B A4B
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 Gemma 4 26B A4B and GPT-5
BenchmarkGemma 4 26B A4BGPT-5Leader
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

Gemma 4 26B A4B$0.0004Fits in one request
GPT-5$0.0063Fits in one request

Gemma 4 26B A4B costs less

Repository review

50K input + 3K output tokens

Gemma 4 26B A4B$0.0093Fits in one request
GPT-5$0.092Fits in one request

Gemma 4 26B A4B costs less

Agent loop

200K input + 10K output tokens

Gemma 4 26B A4B$0.036Fits in one request
GPT-5$0.350Fits 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 Gemma 4 26B A4B and GPT-5
SpecificationGoogle Gemma 4 26B A4BOpenAI GPT-5
MakerGoogleOpenAI
WeightsOpen weightsNo public weights listed
ReleasedApril 3, 2026August 7, 2025
Context window262K400K
Input $/Mtok$0.15$1.25
Output $/Mtok$0.60$10.00
Coding indexNot benchmarked38.8
Independent measurements behind it13
Cost per solved taskNot computable$0.39
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemma 4 26B A4B better than GPT-5 for coding?

Only GPT-5 has a coding score, 38.8 on the Vibe Coding Index; Gemma 4 26B A4B has none, so the two cannot be ranked on coding. Pick Gemma 4 26B A4B for output tokens 16.7x cheaper ($0.60 vs $10.00 per million) and work measured by AA Coding Index or ALE-Bench, where it leads.

Which is cheaper, Gemma 4 26B A4B or GPT-5?

Gemma 4 26B A4B costs $0.15 per million input tokens and $0.60 per million output tokens; GPT-5 costs $1.25 and $10.00. Cost per solved task is known for GPT-5 only.

Which has the bigger context window, Gemma 4 26B A4B or GPT-5?

GPT-5, with 400K tokens against 262K.

How many benchmarks is the Gemma 4 26B A4B vs GPT-5 comparison based on?

52 benchmarks have a result for both models as of October 22, 2026. Gemma 4 26B A4B's coding index rests on 1 independent benchmark and GPT-5's on 3. Where only one model has a result, the page says so instead of naming a winner.

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