onomeoonomeoBeta
Feedback

gpt-oss-20b

By OpenAI

Text only: this model does not read images.

Model name for the APIgpt-oss-20b
Uptime, last 3 days
99%
115 calls counted
Price per reply
Free
Limited by number of calls

Your chats and training

Used to train and improve the provider’s models.

The company that answers for this model states it may use prompts and replies to improve or train its models. Do not send anything private to it.

Which company answers for a model is not published here, so this says what the policy is, not whose it is. Checked against their terms on Sep 28, 2026.

Model facts

Context length
128K tokens
Longest reply
32K tokens
Calls tools
Yes
Knowledge cutoff
Jun 2024
Released
5 Aug 2025
Open weights
Yes

Context, reply length, tool calling, knowledge cutoff, release date and open weights come from the models.dev open dataset, read once a day.

Use in chatAPI docs

Call it through the API

Any OpenAI-compatible client works: use the address in the sample and this model name.

import requests

response = requests.post(
    "https://onomeo.com/v1/chat/completions",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"model": "gpt-oss-20b", "messages": [
        {"role": "user", "content": "Hello!"}
    ]}
)
print(response.json())

More from OpenAI

  1. gpt-6-luna$0.0037 / callToo few calls yet
  2. gpt-6.1-sol$0.0023 / call100% up, last 3 days
  3. gpt-6-astra$0.076 / callToo few calls yet

Other free models

  1. glm-5.3-flashFree79% up, last 3 days
  2. hy4-previewFree97% up, last 3 days
  3. glm-5.2Free98% up, last 3 days
  4. minimax-m2.7Free64% up, last 3 days
  5. glm-4.7-flashFree55% up, last 3 days
  6. ministral-14b-latestFree100% up, last 3 days

gpt-oss-20b against other models

Figures come from real calls made through this site. Models are served by third-party providers and may slow down or be withdrawn; this page follows those changes.