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Merge Gateway

GPT-OSS 120B API

Merge Gateway
About

Build advanced reasoning agents with GPT-OSS 120B, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.09/1M input and $0.36/1M output tokens, open weights architecture. Access GPT-OSS 120B via the Merge Gateway API with up to 33K output tokens.

Capabilities

Input Modalities

text

Output Modalities

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

Tokens

Input Limit
131K

Tokens

Max Output
33K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.09
Output
$0.36
Frequently Asked Questions

GPT-OSS 120B by Merge Gateway costs $0.09 per 1M input tokens and $0.36 per 1M output tokens.

Model Details
ID
openai/gpt-oss-120b
Provider
Merge Gateway
Family
gpt-oss
Release Date
Aug 5, 2025
Knowledge Cutoff
N/A
API Integration
NPM Package
merge-gateway-ai-sdk-provider
Environment Variables
MERGE_GATEWAY_API_KEY
API Base URL
https://api-gateway.merge.dev/v1/ai-sdk
Documentation