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Weights & Biases

gpt-oss-20b API

Weights & Biases
About

Process massive datasets with gpt-oss-20b, featuring an expansive 131K context window for long-document analysis. This model delivers cost-effective pricing at $0.05/1M input and $0.20/1M output tokens, native tool calling support. Access gpt-oss-20b via the Weights & Biases API with up to 131K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
No
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
131K

Tokens

Input Limit
131K

Tokens

Max Output
131K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.05
Output
$0.20
Frequently Asked Questions

gpt-oss-20b by Weights & Biases costs $0.05 per 1M input tokens and $0.20 per 1M output tokens.

Model Details
ID
openai/gpt-oss-20b
Provider
Weights & Biases
Family
gpt-oss
Release Date
Aug 5, 2025
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
WANDB_API_KEY
API Base URL
https://api.inference.wandb.ai/v1
Documentation