Models / LLM and chat
OpenAI · openai/gpt-oss-20b
GPT-OSS 20B
Compact open-weight reasoning
A compact 20B open-weight model suited to efficient reasoning, coding, structured generation, and controllable deployments.
20B
parameters
Open weight
model
Reasoning
focused
OpenAI
maker
Live playground
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imageat playground — GPT-OSS 20B
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Output
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Reason with context
Use the model for analysis, planning, and multi-step knowledge work.
Build and code
Apply it to software development, structured output, and agent workflows.
Generate text
Create clear answers, summaries, drafts, and conversational experiences.
Model overview
What GPT-OSS 20B is built for
A compact 20B open-weight model suited to efficient reasoning, coding, structured generation, and controllable deployments.
- Compact open-weight architecture
- Reasoning and coding tasks
- Structured text generation
- Efficient inference footprint