GPT-OSS 20B
Chat model by OpenAI.
OpenAI language model featuring a 131,072-token context window. Engineered for dialogue, instruction following, and versatile text generation.
Context window
Maximum input context length.
131.1K
Maker
OpenAI
Specifications
Context window, ranked against other chat models
Proportional scale: 0 to 1.05M tokens. Not ranked, no published context window: qwen-plus-2025-09-11, voxtral-small-24b-2507, qwen3.6-plus-2026-04-02.
131.1K
tokens—
chat
Benchmarks & performance rankings
Empirical intelligence benchmarks and category leaderboard placements for GPT-OSS 20B.
Pricing
Rates are read live
Pricing for openai/gpt-oss-20b is fetched from the live catalogue on load, so it is never served from a cache that could outlive a repricing.
Availability
Not enough data yet
We have not collected enough health probes for this model to publish an uptime or latency figure. A percentage from a handful of samples is fabricated precision, so none is shown until the sample count supports one.
How GPT-OSS 20B is billed
Billed at the provider's list price, with no per-token markup.
- Exact list price
- Tokens settle at the published rate of the model that served your call.
- Cache discounts passed through
- Provider prompt-caching discounts reach your balance with no added fee.
- Cost on every response
- Each response carries the
x-nr-request-costheader, so you can reconcile spend per request.
More from OpenAI
Start building with openai/gpt-oss-20b
One API key, three steps. Choose your tool to begin.
Get a key
Create API keySet your API key
export NROUTER_API_KEY="<YOUR_API_KEY>"Configure Claude Code
Choose a tool, then copy its setup from the panel.
FAQs
What is GPT-OSS 20B?
OpenAI language model featuring a 131,072-token context window. Engineered for dialogue, instruction following, and versatile text generation.
How much does GPT-OSS 20B cost?
GPT-OSS 20B is billed at the provider's list price on nRouter with no per-token markup — tokens settle at the exact upstream rate. Input and output rates are read live, so see the pricing section above for the current figures.
What is the context length of GPT-OSS 20B?
GPT-OSS 20B supports a 131,072-token context window.
Does GPT-OSS 20B support tool calling and structured outputs?
Yes. GPT-OSS 20B supports tool calling (function calling), so it can invoke external tools and APIs during a conversation.
What inputs and outputs does GPT-OSS 20B support?
GPT-OSS 20B takes text as input and returns text as output.
How do I use GPT-OSS 20B via nRouter?
Use any OpenAI-compatible client: point it at https://api.nrouter.ai/v1 with your nRouter API key and set the model to "deepinfra/openai/gpt-oss-20b". The quick-start panel above has a copy-paste curl command for this model.
When was GPT-OSS 20B released?
GPT-OSS 20B was released on October 7, 2026.
Where is the GPT-OSS 20B documentation?
Start at nrouter.ai/docs. The quick-start guide (nrouter.ai/docs/getting-started/quick-start) covers API keys and your first request, and the API reference (nrouter.ai/docs/api-reference) lists every parameter.
What other text models does OpenAI have?
Other OpenAI text models on nRouter include GPT-OSS 120B 1 (nrouter.ai/models/gpt-oss-120b-1), GPT-6.1 Sol (nrouter.ai/models/gpt-6.1-sol), GPT-5.2 Pro (nrouter.ai/models/gpt-5.2-pro-2025-12-11), GPT Audio 1.5 (nrouter.ai/models/gpt-audio-1.5).