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GPT OSS 20B High

OpenAI

GPT OSS 20B High is OpenAI's compact open-source model with 20 billion parameters in high mode with extended reasoning. 131K token context window.

Key Specifications

Parameters
20.0B
Context
131.1K
Release Date
October 1, 2025
Average Score
-

Timeline

Key dates in the model's history
Announcement
October 1, 2025
Last Update
February 12, 2026
Today
March 25, 2026

Technical Specifications

Parameters
20.0B
Training Tokens
-
Knowledge Cutoff
-
Family
-
Capabilities
MultimodalZeroEval

Pricing & Availability

Input (per 1M tokens)
$0.10
Output (per 1M tokens)
$0.50
Max Input Tokens
131.1K
Max Output Tokens
65.5K
Supported Features
Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning

Benchmark Results

Model performance metrics across various tests and benchmarks

License & Metadata

License
apache-2.0
Announcement Date
October 1, 2025
Last Updated
February 12, 2026

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