gpt-oss-120b-fast API
About
Build advanced reasoning agents with gpt-oss-120b-fast, 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 gpt-oss-120b-fast via the Nebius Token Factory API with up to 8K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsOpen
Limits
Context Window
8K
Tokens
Input Limit
7K
Tokens
Max Output
8K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.10
Output
$0.50
Caching (per 1M tokens)
Read
$0.01
Write
$0.13
Frequently Asked Questions
gpt-oss-120b-fast by Nebius Token Factory costs $0.10 per 1M input tokens and $0.50 per 1M output tokens. Cached reads cost $0.01 per 1M tokens. Cache writes cost $0.13 per 1M tokens.
Model Details
ID
openai/gpt-oss-120b-fast
Provider
Nebius Token FactoryFamily
Release Date
Jun 10, 2025
Knowledge Cutoff
Jun 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
NEBIUS_API_KEY
API Base URL
https://api.tokenfactory.nebius.com/v1