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openai/gpt-oss-20b

gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for lower-latency...

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131.1K max output
Input $0.03/M · Output $0.14/M
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API details and access

Model Details

ProviderOpenAI
TypeLlm
Model IDopenai/gpt-oss-20b

Capabilities

InputText
OutputText
Context-
Max Output131,072
VisionNot supported
Function CallingSupported

Access details

Responses API
Base URLhttps://api.sandbase.ai
API Endpoint/v1/responses
{
  "model": "openai/gpt-oss-20b",
  "instructions": "You are a helpful assistant.",
  "input": "Hello",
  "max_output_tokens": 512
}

Pricing

Input$0.03 / 1M tokens
Output$0.14 / 1M tokens

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