gpt-oss-20b
OpenAI/Open weights/2 providers
GPT-OSS-20B is OpenAI's lightweight open-weight model with 21.5 billion total parameters (3.6 billion active, Mixture-of-Experts). Optimized for lower latency and local or specialized use cases including agentic tasks, chain-of-thought reasoning, and web browsing. Released under Apache 2.0 license.MoreLess
Which id to call
fireworks/gpt-oss-20bThis model has no managed policy yet, so call the provider endpoint directly. Every id in the endpoints table works the same way.
From /1M input
$0.07
Fireworks AI
Context
131K
66K output
Endpoints
2
1 region
Price spread
1.4x
2 endpoints
Capabilities 4/8
2 endpoints / 1 region
Providers serving gpt-oss-20b
Provider prices, per 1M tokens. Pay as you go adds 5%, or 0% on your own keys.
| Rank | Privacy | ||||||
|---|---|---|---|---|---|---|---|
| 1 |  Fireworks AI | Global | 131K | $0.07 | $0.30 | $0.04 | zdr |
| 2 |  Groq Inc. | Global | 131K | $0.10 | $0.50 | $0.10 | zdr |
A column is blank where no qualifying sample exists, and every row links to that provider's endpoint page.
model=
Which id to call
One base url, https://router.requesty.ai/v1, and one key for every id here.
fireworks/gpt-oss-20bThis model has no managed policy yet, so call the provider endpoint directly. Every id in the endpoints table works the same way.
OpenAI compatible
Call it in three lines
Change the base url, use your Requesty key, set the model to any id on the left. Existing OpenAI SDK code needs no other edit.
123456789101112131415from openai import OpenAI client = OpenAI( api_key="YOUR_REQUESTY_API_KEY", base_url="https://router.requesty.ai/v1", ) response = client.chat.completions.create( model="fireworks/gpt-oss-20b", messages=[ {"role": "user", "content": "Explain quantum computing in one paragraph."}, ], ) print(response.choices[0].message.content)
Artificial Analysis
Benchmark scores
Graduate-level physics, chemistry & biology questions designed to resist Googling.
Artificial Analysis Intelligence Index: a composite of multiple evaluations measuring overall model capability.
Scores from artificialanalysis.ai. They measure the model, not the provider, so they are the same on every endpoint above.
6
More from OpenAI
Reference
gpt-oss-20b questions
Which providers serve gpt-oss-20b?
gpt-oss-20b is available from 2 providers through Requesty: Fireworks AI, Groq Inc.. All endpoints share one OpenAI-compatible API and one key, and Requesty fails over between them automatically.
How much does gpt-oss-20b cost?
Pricing starts at $0.07 per million input tokens and $0.30 per million output tokens on Fireworks AI, the cheapest endpoint. Prices vary by provider and region; the table above shows every endpoint. Those are the upstream provider rates: pay as you go adds 5% on top, or 0% if you bring your own provider keys.
Is gpt-oss-20b open weights?
Yes. gpt-oss-20b is an open-weights model from OpenAI, which is why multiple inference providers can host it. Provider choice affects price, latency, and data-privacy terms, all compared above.
What is the context window of gpt-oss-20b?
gpt-oss-20b supports up to 131K tokens of context, with up to 66K output tokens per response. Some providers expose a smaller window; check the per-endpoint context column above.
How do I use gpt-oss-20b with the OpenAI SDK?
Install the OpenAI SDK, set base_url to "https://router.requesty.ai/v1", set your API key to your Requesty key, and set the model to "fireworks/gpt-oss-20b" or any endpoint id from the table above. The quickstart section shows Python, JavaScript and cURL snippets.
Route gpt-oss-20b through one endpoint
One key for 2 providers on this model and 600+ others. No markup on provider prices, automatic failover, caching built in.