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GPT OSS 20B (free)
openai/
OpenAI model · Served by DeepInfra · live on the gateway · :free available
Input / 1M
$0.030
Output / 1M
$0.140
Context
131K tokens
Max output
16K tokens
Input
Text
Released
1y ago
Pricing
Input tokens$0.030 per 1M
Output tokens$0.140 per 1M
Provider list priceExactly what your balance is debited; our fee is charged when you buy credits
About GPT OSS 20B (free)
Open GPT reasoning model for self-hosted agents and controllable deployments
FreeReasoningTools
What it supports
- Tool calling (function calling)
- JSON mode and structured output
- Image input (vision)
- Audio input
- Extended reasoning
- Streaming responses
- OpenAI SDK, Anthropic SDK and any OpenAI-compatible client
Make a request
curl https://rapidrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $RAPIDROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-oss-20b:free",
"messages": [{ "role": "user", "content": "Hello" }]
}'Frequently asked
How do I call GPT OSS 20B (free) through an OpenAI-compatible API?
Point any OpenAI-compatible client at https://rapidrouter.ai/api/v1 with a Rapid Router API key and set the model to openai/gpt-oss-20b:free. The chat completions endpoint is https://rapidrouter.ai/api/v1/chat/completions.
What is the context window of GPT OSS 20B (free)?
GPT OSS 20B (free) has a context window of 131,072 tokens on Rapid Router, and returns up to 16,384 output tokens per reply.
Is there a free version of GPT OSS 20B (free)?
Yes. Call openai/gpt-oss-20b:free:free and the request is paid for from Rapid Router's sponsored daily pool, within the free tier's daily request limit.
What can GPT OSS 20B (free) do?
On Rapid Router, GPT OSS 20B (free) supports tool calling, extended reasoning.