OpenAI GPT 120B API
About
Build advanced reasoning agents with OpenAI GPT 120B, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.10/1M input and $0.50/1M output tokens, native tool calling support, open weights architecture. Access OpenAI GPT 120B via the Baseten API with up to 128K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsOpen
Limits
Context Window
128K
Tokens
Input Limit
128K
Tokens
Max Output
128K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.10
Output
$0.50
Frequently Asked Questions
OpenAI GPT 120B by Baseten costs $0.10 per 1M input tokens and $0.50 per 1M output tokens.
Model Details
ID
openai/gpt-oss-120b
Provider
BasetenFamily
gpt-oss
Release Date
Aug 5, 2025
Knowledge Cutoff
Aug 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
BASETEN_API_KEY
API Base URL
https://inference.baseten.co/v1