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Gemma 4 26B A4B IT vs GPT OSS 20B

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Free to try, no account needed. You see each answer’s cost and speed.

At a glance

Longer bar means the bigger number.

Open or closed · can you download the model and run it yourself?

Gemma 4 26B A4B ITOpen weights · download it, run it on your own hardware or any host
GPT OSS 20BOpen weights · download it, run it on your own hardware or any host

Blended price · per 1M tokens, lower is better

Gemma 4 26B A4B IT$0.26
GPT OSS 20B$0.06

Intelligence Index · Artificial Analysis, higher is better

Gemma 4 26B A4B IT16.7
GPT OSS 20B10

Context window · tokens it can read at once

Gemma 4 26B A4B IT262K
GPT OSS 20B131K

Where they sit among all 44 models

Gemma 4 26B A4B IT ranks 34th of the 43 models with an Intelligence Index, GPT OSS 20B 41st. Up and to the left is smarter for less money. Hover or tap a dot for its numbers, then click it to compare that model with Gemma 4 26B A4B IT.

Show
Rank by
Intelligence: the Artificial Analysis Intelligence Index. Price: blended per 1M tokens, 3 parts input to 1 part output, on a log scale.

Which one to pick

Pick Gemma 4 26B A4B IT if

  • you want the higher overall score (16.7 vs 10)
  • you care about AA-LCR (long documents): 65.7 vs 31
  • you care about GPQA Diamond (science): 79.2 vs 61.1
  • you need a longer context window (262K vs 131K tokens)

Pick GPT OSS 20B if

  • you want the lower bill ($0.06 vs $0.26 per 1M tokens blended)

See how they answer your prompt

Same prompt, both models

We send the same short tests to every model several times. These are the ones where Gemma 4 26B A4B IT and GPT OSS 20B answered differently, from our run on October 25, 2026. Long answers are cut short.

Best AI model

“Which AI model is the best right now? Reply with one model name only.”

Gemma 4 26B A4B IT

“gpt-4o” 2 of 3 times

GPT-4o

under $0.0001 · 0.5s

GPT OSS 20B

“gpt-4” 2 of 3 times

GPT-4

under $0.0001 · 2.1s

Name a smart-umbrella startup

“Invent a name for a startup that sells smart umbrellas. Reply with the name only.”

Gemma 4 26B A4B IT

“skyguard” 5 of 5 times

SkyGuard

under $0.0001 · 0.4s

GPT OSS 20B

5 different answers in 5 tries

UmbrellaSense

under $0.0001 · 4.3s

Run your own test on both

Asked to draw the same picture

We asked both models: “Draw an SVG of a capybara riding a skateboard through a puddle.” They had to answer with SVG code alone, with no image tools.

Gemma 4 26B A4B IT's SVG drawing of a capybara riding a skateboard through a puddle

Gemma 4 26B A4B IT

GPT OSS 20B's SVG drawing of a capybara riding a skateboard through a puddle

GPT OSS 20B

Each model’s first drawing, exactly as it wrote the SVG. Nothing was picked or retouched.

Ask both for your own drawing

How smart is each one?

Of the 6 scores both models have, Gemma 4 26B A4B IT is ahead on every one.

Every intelligence score we have

Out of 100, higher is better. Gemma 4 26B A4B IT GPT OSS 20B

Overall

  • Intelligence Index

By area

  • Coding

    GPT OSS 20B: not scored yet

  • Math

    Gemma 4 26B A4B IT: not scored yet

  • Agentic work

    GPT OSS 20B: not scored yet

By field of work

  • Economics

    GPT OSS 20B: not scored yet

Benchmarks

  • Hard reasoning · Humanity's Last Exam

  • Science · GPQA Diamond

  • Knowledge · MMLU-Pro

    Gemma 4 26B A4B IT: not scored yet

  • Competitive coding · LiveCodeBench

    Gemma 4 26B A4B IT: not scored yet

  • Scientific coding · SciCode

    GPT OSS 20B: not scored yet

  • Tool use · τ-Bench Banking

    GPT OSS 20B: not scored yet

  • Instruction following · IFBench

  • Long documents · AA-LCR

  • Competition math · AIME 2025

    Gemma 4 26B A4B IT: not scored yet

  • Uncensored · UGI

Test them on your own question

The specs

Spec Gemma 4 26B A4B IT GPT OSS 20B
Input price$0.15 per 1M$0.03 per 1M
Output price$0.60 per 1M$0.14 per 1M
Cost per test taskNot testedNot tested
Context window262K131K
Max output131K8K
AcceptsText, Image, PDFText
Open weightsYesYes
LabGoogleOpenAI
ReleasedApr 2026Aug 2025
Knowledge cutoffNot publishedJun 2024

Blended price weighs 3 parts input to 1 part output. List prices from models.dev.

Questions

Is Gemma 4 26B A4B IT or GPT OSS 20B cheaper?

GPT OSS 20B is cheaper. It charges $0.03 per 1M input tokens and $0.14 per 1M output tokens, against $0.15 and $0.60 for Gemma 4 26B A4B IT. Blended 3 parts input to 1 part output, that is $0.06 against $0.26 per 1M tokens.

Are Gemma 4 26B A4B IT and GPT OSS 20B open source?

Both are open-weights models: Google and OpenAI publish the weights, so you can download them and run them on your own hardware, or call them through any host's API. Check each model's license before you ship it.

Which is smarter, Gemma 4 26B A4B IT or GPT OSS 20B?

Gemma 4 26B A4B IT scores higher on the Artificial Analysis Intelligence Index, 16.7 against 10 for GPT OSS 20B. The biggest differences are on AA-LCR (65.7 vs 31) and GPQA Diamond (79.2 vs 61.1).

Which has the longer context window?

Gemma 4 26B A4B IT accepts 262K tokens, against 131K for GPT OSS 20B.

Can I compare Gemma 4 26B A4B IT and GPT OSS 20B on my own prompt?

Yes. ModelCompare sends one prompt to both models at once and shows each answer side by side with what it cost. You can try it free without an account.

Still deciding? Send one prompt to both and read the answers side by side, with what each one cost. Compare Gemma 4 26B A4B IT and GPT OSS 20B →

Where the numbers come from

Intelligence Index and benchmark scores are from Artificial Analysis, at each model’s highest effort, except SimpleQA, which is from Epoch AI, and the Uncensored score, which is from the UGI Leaderboard. The hallucination test is ours: questions with one exact answer, fake evidence pushed against right answers and requests that tempt a model to name packages that don’t exist. Prices are list prices from models.dev. Example answers come from our own test runs. Updated October 26, 2026.