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Model comparison · Updated 2 Nov 2026

Gemma 4 26B A4B vs gpt-oss-20b

gpt-oss-20b is about 1.3× cheaper on input ($0.02 against $0.02 per 1M tokens), though Gemma 4 26B A4B is cheaper on output. Gemma 4 26B A4B has the larger context window (262K against 131K tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $17.37 a month for Gemma 4 26B A4B and $16.20 for gpt-oss-20b.

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ModelsAtlas. “Gemma 4 26B A4B vs gpt-oss-20b”. Retrieved 2 Nov 2026. https://modelsatlas.com/compare/google/gemma-4-26b-a4b-it/vs/openai/gpt-oss-20b

Model A

Gemma 4 26B A4B

by Google · weights not marked open · GRIDB4

Input / 1M
$0.02
observed We measured
Source
Our catalogue
Retrieved
2 Nov 2026
Output / 1M$0.07
Context262K
vs

Model B

gpt-oss-20b

by OpenAI · weights not marked open · GRIDB3

Input / 1M
$0.02
observed We measured
Source
Our catalogue
Retrieved
10 Oct 2026
Output / 1M$0.09
Context131K

Key numbers

Standard tier · highlighted = better

Gemma 4 26B A4B
gpt-oss-20b
Input / 1M tokens
$0.02
$0.02
Output / 1M tokens
$0.07
$0.09
Batch input / output
Not listed
$0.02 / $0.11
Context window
262,144
131,072
Input types
Not disclosed
Not disclosed
Weights
Not marked open
Not marked open
Tiers listed
free, standard
standard, batch
Prices checked
2026-11-02
2026-10-10

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out
$17.37/mo
$16.20/mo
RAG over documents2k queries/day · 12k in, 500 out
$19.47/mo
$15.66/mo
Coding agent300 tasks/day · 60k in, 8k out
$18.22/mo
$16.20/mo

Gemma 4 26B A4B   gpt-oss-20b · Derived from the standard-tier prices above, input and output tokens per request as stated, 30 days. Excludes caching discounts and batch. Try your own numbers.

On the atlas

Price band (A–H) × context band (1–6)

1 square apart. gpt-oss-20b (B3) sits 1 context band smaller than Gemma 4 26B A4B (B4).

Same square as Gemma 4 26B A4B: Nemotron 3 Nano 30B A3B ($0.06), Qwen3 235B A22B Instruct 2507 ($0.09), Qwen3 Next 80B A3B Instruct ($0.09). Same square as gpt-oss-20b: Mistral Nemo ($0.03), Gemma 3 12B ($0.05), Gemma 3 4B ($0.05). Open B4 · Open B3

AFreeB<$0.10C$0.10–0.30D$0.30–1E$1–3F$3–10G$10–30H$30+1<32K232–128K3128–256K4256K–1M51M6>1MINPUT PRICE PER 1M TOKENS →CONTEXT WINDOW ↑ · position within a square follows the real valueNemotron 3 Nano 30B A3B · B4Qwen3 235B A22B Instruct 2507 · B4Qwen3 Next 80B A3B Instruct · B4Mistral Nemo · B3Qwen3.7 Flash · B5Gemma 3 12B · B3Gemma 3 4B · B3Llama 3.1 8B Instruct · B3Llama 3.2 3B Instruct · B3Mistral Small 3.2 24B · B3Gemma 4 26B A4BGemma 4 26B A4Bgpt-oss-20bgpt-oss-20b
Gemma 4 26B A4Bgpt-oss-20bNearest neighboursOpen weights
View the map as a table (3 squares)
SquarePrice bandContext bandModels
GRIDB3<$0.10128–256Kgpt-oss-20b, Mistral Nemo, Gemma 3 12B, Gemma 3 4B, Llama 3.1 8B Instruct, Llama 3.2 3B Instruct, Mistral Small 3.2 24B
GRIDB4<$0.10256K–1MGemma 4 26B A4B, Nemotron 3 Nano 30B A3B, Qwen3 235B A22B Instruct 2507, Qwen3 Next 80B A3B Instruct
GRIDB5<$0.101MQwen3.7 Flash

Capabilities side by side

Only what our records list

Gemma 4 26B A4B
gpt-oss-20b
Vision input
Not disclosed
Not disclosed
Audio input
Not disclosed
Not disclosed
Open weights
Not marked open
Not marked open
Batch tier
Not listed
Supported
Free tier
Supported
Not listed
Thinking tier
Not listed
Not listed

Neither record lists input types, so we do not claim any.

Which should you choose?

Editorial

Choose Gemma 4 26B A4B if…

  • output dominates your bill: $0.07 per 1M output against $0.09
  • your prompts are long: it takes 262,144 tokens against 131,072
  • you want to try it free: it lists a free tier

Choose gpt-oss-20b if…

  • you pay by the token: it costs $0.02 per 1M input against $0.02
  • work can wait: it lists a batch tier and the other does not

Each reason is a fact from the tables above. Picking between them is our judgement, and we do not benchmark quality: price and context are what we can measure, so test both on your own prompts before you commit.

Questions

Is Gemma 4 26B A4B better than gpt-oss-20b?
We do not benchmark quality, so we cannot say. On the recorded numbers: gpt-oss-20b is about 1.3× cheaper on input ($0.02 against $0.02 per 1M tokens), though Gemma 4 26B A4B is cheaper on output. Gemma 4 26B A4B has the larger context window (262K against 131K tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $17.37 a month for Gemma 4 26B A4B and $16.20 for gpt-oss-20b. Which is better for you depends on your task; test both on your own prompts.
Which is cheaper, Gemma 4 26B A4B or gpt-oss-20b?
gpt-oss-20b: $0.02 against $0.02 per 1M input tokens, and $0.09 against $0.07 per 1M output, on standard pricing.
How much does each cost per 1M tokens?
Gemma 4 26B A4B: $0.02 input and $0.07 output. gpt-oss-20b: $0.02 input and $0.09 output. Standard tier, USD.
Which has the larger context window?
Gemma 4 26B A4B, with 262,144 tokens. gpt-oss-20b has 131,072 tokens.
Do both offer batch pricing?
Gemma 4 26B A4B lists no batch tier. gpt-oss-20b lists a batch tier.
Can both read images or audio?
Input types recorded for Gemma 4 26B A4B: none recorded. For gpt-oss-20b: none recorded. Where a record lists none we say so rather than guess; check each vendor's documentation before relying on a capability.
Is either model open-weight?
Gemma 4 26B A4B: not marked open-weight in our records. gpt-oss-20b: not marked open-weight in our records.
Is either model free?
Gemma 4 26B A4B is listed at no per-token charge; gpt-oss-20b is not. Read the provider's limits before relying on a free offer.
What would each cost for a support chatbot?
At 10,000 chats a day, 1,500 input and 300 output tokens each, 30 days, standard tier: about $17.37 a month for Gemma 4 26B A4B and $16.20 for gpt-oss-20b. This is our calculation from the listed prices, not a quote.

About the two models

Gemma 4 26B A4B

By Google. $0.02 input and $0.07 output per 1M tokens, 262K context, atlas square B4. Tiers listed: free, standard.

Full specs & pricing →

gpt-oss-20b

By OpenAI. $0.02 input and $0.09 output per 1M tokens, 131K context, atlas square B3. Tiers listed: standard, batch.

Full specs & pricing →

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