Explore OpenAI's gpt-oss-20b Model

A versatile text model with MoE architecture for efficient processing.

Input: text Output: text Context: 131,072 tokens Release: 2025-08-05

Discover OpenAI's gpt-oss-20b, released in August 2025. This model features a Mixture-of-Experts architecture with 3.6 billion active parameters per forward pass. It supports a wide context length of 131,072 tokens, making it suitable for extensive text processing tasks. The model accepts text inputs and provides text outputs, offering capabilities like reasoning level configuration, fine-tuning, and agentic functions, including function calling and structured outputs. It's optimized for lower-latency inference, making it deployable on consumer hardware.

Use Cases

Here are a few ways teams apply OpenAI: gpt-oss-20b (free) in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Enhance text processing tasks

Develop agentic applications

Implement efficient function calling

Create structured text outputs

Optimize for consumer hardware deployment

Key Features

A quick look at the capabilities that make this model useful in real projects.

Mixture-of-Experts architecture

3.6B active parameters per pass

Supports reasoning level configuration

Agentic capabilities like function calling

Optimized for lower-latency inference

Wide context length of 131,072 tokens

Specs

Overview

Vendor
openai

Model ID
openai/gpt-oss-20b:free

Release
2025-08-05

Modalities & context

Input
text

Output
text

Context
131,072 tokens

Parameters & defaults

Supported parameters: frequency_penalty, include_reasoning, max_tokens, presence_penalty, reasoning, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_p

Defaults: temperature 0.2, top_p 0.95

Benchmark tests: OpenAI: gpt-oss-20b (free)

We ran this model against a few representative prompts to show its range. Review the outputs below and be the judge.

Text

Prompt:

Write 150 words on how AI might positively upend work, leisure and creativity

Artificial intelligence is poised to transform the modern landscape, reshaping work, leisure, and creativity in ways that amplify human potential. In the workplace, AI can automate repetitive tasks, freeing employees to focus on strategic, empathetic, and innovative endeavors. Collaborative robots and intelligent analytics enable faster decision‑making, personalized learning, and inclusive design, fostering a more dynamic and equitable environment. During leisure, AI curates personalized experiences—music, art, and travel—while virtual assistants manage schedules, allowing people to savor downtime without logistical burdens. Moreover, AI‑powered creative tools democratize expression: writers, musicians, and visual artists can experiment with generative models, exploring new styles and narratives that would otherwise be inaccessible. By lowering technical barriers, AI invites diverse voices into the creative sphere, enriching cultural dialogue. Ultimately, these shifts encourage a more thoughtful, productive, and imaginative society, where technology amplifies human ingenuity rather than replacing it. Together, we can harness AI to build a brighter future.

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up.end

/ˌəpˈend/

verb

To “upend” means to completely disrupt, overturn, or drastically change the established order or structure of something. It implies a significant shift or alteration that can potentially have far-reaching consequences. When something is upended, it is turned upside down or transformed in a way that challenges conventional norms or expectations. The term often carries a sense of innovation, transformation, and sometimes even a hint of upheaval, indicating that the changes are not just minor adjustments but rather a fundamental reimagining of the status quo.

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