Title: gpt-oss-20b | LLM EU
Canonical: https://llmeu.com/cs/models/gpt-oss-20b/
Markdown mirror: https://llmeu.com/cs/models/gpt-oss-20b.md
Machine-readable: https://llmeu.com/llms.txt (index) - https://llmeu.com/llms-full.txt (full catalogue) - https://llmeu.com/llms-catalogue.json
Provider: OpenAI
Licence: apache-2.0
Hosting: catalogue only %E2%80%94 not hosted on LLM EU yet
Sources: https://huggingface.co/openai/gpt-oss-20b

# gpt-oss-20b

[OpenAI](/cs/providers/openai/)

Naposledy zkontrolov%C3%A1no: 14. 10. 2026

## Suverenita a hosting

Tento model je uveden v katalogu pro referenci. Zat%C3%ADm nen%C3%AD hostov%C3%A1n na LLM EU a %C5%BE%C3%A1dn%C3%BD endpoint prvn%C3%AD strany zde neposkytuje jeho slu%C5%BEby. Po%C5%BEadavky na n%C4%9Bj sm%C4%9B%C5%99uj%C3%AD p%C5%99%C3%ADmo k poskytovateli, podle jeho vlastn%C3%ADch podm%C3%ADnek.

## Shrnut%C3%AD

gpt-oss-20b je men%C5%A1%C3%AD ze dvou model%C5%AF pro uva%C5%BEov%C3%A1n%C3%AD s otev%C5%99en%C3%BDmi v%C3%A1hami od OpenAI: celkem 21 miliard parametr%C5%AF, 3,6 miliard aktivn%C3%ADch, licencovan%C3%BD pod Apache-2.0 a dostate%C4%8Dn%C4%9B mal%C3%BD, aby b%C4%9B%C5%BEel v p%C5%99ibli%C5%BEn%C4%9B 16 GB pam%C4%9Bti. Jeho konfigurace deklaruje stejn%C3%A9 kontextov%C3%A9 okno 131 072 token%C5%AF jako model 120B. Zam%C4%9B%C5%99uje se sp%C3%AD%C5%A1e na lok%C3%A1ln%C3%AD nasazen%C3%AD a nasazen%C3%AD citliv%C3%A1 na latenci ne%C5%BE na %C5%A1pi%C4%8Dkovou kvalitu.

## Specifikace

- Poskytovatel
  OpenAI (US)
- Kontextov%C3%A9 okno
  131k
- Parametry
  20.91B
- Modality
  text
- Licence
  apache-2.0 %C2%B7 [licence](https://www.apache.org/licenses/LICENSE-2.0)
- Otev%C5%99en%C3%A9 v%C3%A1hy
  yes
- Datum vyd%C3%A1n%C3%AD
  05. 8. 2025
- %C3%9Alohy
  [Uva%C5%BEov%C3%A1n%C3%AD](/cs/tasks/reasoning/), [N%C3%ADzk%C3%A9 n%C3%A1klady](/cs/tasks/cheap/), [K%C3%B3dov%C3%A1n%C3%AD](/cs/tasks/coding/), [Vyhled%C3%A1v%C3%A1n%C3%AD (RAG)](/cs/tasks/rag/)

## Jazyky

**Siln%C3%A1:** en

**Dostate%C4%8Dn%C3%A1:** de, fr, es, it, pt, ja, zh

#### Siln%C3%A1

- en

#### Dostate%C4%8Dn%C3%A1

- de
- fr
- es
- it
- pt
- ja
- zh

Neov%C4%9B%C5%99eno: poskytovatel toto tvrzen%C3%AD nedokumentoval. %E2%80%94 a language is listed as strong only where a source claims it; the card links the evidence where one exists.

## Kdy pou%C5%BE%C3%ADt

#### Siln%C3%A9 str%C3%A1nky

- runs in about 16GB of memory
- same 131,072-token window as the larger sibling
- Apache-2.0 licence
- reasoning-effort control

#### Omezen%C3%AD

- quality clearly below the 120B model
- harmony response format required
- no evaluation has been run by LLM EU

## %C4%8Casto kladen%C3%A9 ot%C3%A1zky

### Is gpt-oss-20b served on LLM EU?

It has no endpoint in the catalogue, so it is catalogue only %E2%80%94 not hosted on LLM EU yet, with no region and no retention to report. A card whose status is "listed" is a catalogue entry, not a running deployment.

### Under what licence is gpt-oss-20b released?

gpt-oss-20b is recorded under apache-2.0. The recorded licence text is https://www.apache.org/licenses/LICENSE-2.0. The weights are downloadable (open_weights is true). LLM EU republishes the licence id and the link and gives no legal advice; the licence text governs.

### How large is gpt-oss-20b, and what context window does it have?

gpt-oss-20b is recorded at 21B total, 3.6B active (safetensors total 20,914,757,184) (source: https://huggingface.co/openai/gpt-oss-20b), with a context window of 131072 tokens (source: https://huggingface.co/openai/gpt-oss-20b/blob/main/config.json).

### Ceny

Tento model je uveden v katalogu pro referenci. Zat%C3%ADm nen%C3%AD hostov%C3%A1n na LLM EU a %C5%BE%C3%A1dn%C3%BD endpoint prvn%C3%AD strany zde neposkytuje jeho slu%C5%BEby. Po%C5%BEadavky na n%C4%9Bj sm%C4%9B%C5%99uj%C3%AD p%C5%99%C3%ADmo k poskytovateli, podle jeho vlastn%C3%ADch podm%C3%ADnek.

### Stav ov%C4%9B%C5%99en%C3%AD

Pokud pole nem%C3%A1 zdroj, karta jej zobraz%C3%AD jako neov%C4%9B%C5%99en%C3%A9, m%C3%ADsto aby jej vyplnila. Pr%C3%A1zdn%C3%A9 pole je informace.

LLM EU Verified znamen%C3%A1 zdokumentov%C3%A1no, nikoli pr%C3%A1vn%C4%9B certifikov%C3%A1no. Nejde o posouzen%C3%AD shody podle AI Act a LLM EU nen%C3%AD org%C3%A1nem EU.

### Verze a varianty

- catalogue %C2%B7 Pouze katalog %C2%B7 [weights](https://huggingface.co/openai/gpt-oss-20b)

### P%C5%99%C3%ADklad po%C5%BEadavku

```
curl https://api.llmeu.com/v1/chat/completions \
  -H "Authorization: Bearer $LLMEU_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-oss-20b","messages":[{"role":"user","content":"Hello"}]}'
```

Pro tento model nen%C3%AD nasazen %C5%BE%C3%A1dn%C3%BD playground: %C5%BE%C3%A1dn%C3%BD koncov%C3%BD bod jej neobsluhuje, tak%C5%BEe po%C5%BEadavek by nem%C4%9Bl kam j%C3%ADt.

### Benchmarky

%C5%BD%C3%A1dn%C3%A9 zve%C5%99ejn%C4%9Bn%C3%A9 hodnocen%C3%AD. Toto je mezera, nikoli skryt%C3%BD v%C3%BDsledek.

### Zdroje

- [huggingface.co](https://huggingface.co/openai/gpt-oss-20b)

### Historie zm%C4%9Bn karty

- 05. 8. 2025 %E2%80%94 Datum vyd%C3%A1n%C3%AD
- 14. 10. 2026 %E2%80%94 Naposledy zkontrolov%C3%A1no

Naposledy zkontrolov%C3%A1no: 14. 10. 2026