GPT OSS 20B API
About
Build advanced reasoning agents with GPT OSS 20B, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.07/1M input and $0.25/1M output tokens, native tool calling support, open weights architecture. Access GPT OSS 20B via the Vertex API with up to 33K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsOpen
Limits
Context Window
131K
Tokens
Input Limit
131K
Tokens
Max Output
33K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.07
Output
$0.25
Caching (per 1M tokens)
Read
$0.0070
Frequently Asked Questions
GPT OSS 20B by Vertex costs $0.07 per 1M input tokens and $0.25 per 1M output tokens. Cached reads cost $0.0070 per 1M tokens.
Model Details
API Integration
NPM Package
@ai-sdk/google-vertex
Environment Variables
GOOGLE_VERTEX_PROJECT
GOOGLE_VERTEX_LOCATION
GOOGLE_APPLICATION_CREDENTIALS