GPT OSS 20B
AffordableRun locallyOpenAI's compact open-weights model for efficient inference.
Small 20B model designed for deployability and cost-effectiveness on common tasks.
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GPT OSS 20B is somewhat expensive at $0.02/M tokens input and $0.09/M tokens output. Cached input reads are priced at $0.009/M tokens, making repeated context cheaper. The model supports extended reasoning, a 131K context window.
Benchmarks
Category Rankings
Specifications
Performance
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Run locally
Run GPT OSS 20B on your own computer with the Local AI Engine for free, with no rate limits and no third-party AI provider involved. idapt installs it and routes chat to your hardware automatically.
ollama pull gpt-oss:20b
Misc
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When was GPT OSS 20B released?
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GPT OSS 20B was released on August 5, 2025.
Who created GPT OSS 20B?
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GPT OSS 20B was created by OpenAI.
How much does GPT OSS 20B cost?
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GPT OSS 20B costs $0.02/M input tokens and $0.09/M output tokens.
What is GPT OSS 20B API pricing?
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The GPT OSS 20B API is priced at $0.02 per million input tokens and $0.09 per million output tokens. You can access GPT OSS 20B through idapt.app alongside 200+ other AI models in one workspace.
Is GPT OSS 20B a reasoning model?
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Yes, GPT OSS 20B is a reasoning model. It can think step-by-step through complex problems before providing an answer, often yielding better results on difficult tasks like math, coding, and multi-step logic.
Does GPT OSS 20B support image or vision input?
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No, GPT OSS 20B does not currently support image or vision input. It is a text-only model.
Does GPT OSS 20B support audio?
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No, GPT OSS 20B does not support audio input.
What is the context window of GPT OSS 20B?
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GPT OSS 20B has a context window of 131K tokens, meaning it can process approximately 98,304 words of context at once.
Is GPT OSS 20B open source?
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GPT OSS 20B is a proprietary model developed by OpenAI. The model weights and training data are not publicly available.
Where can I use GPT OSS 20B?
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You can chat with GPT OSS 20B on idapt.app — no separate API key required. idapt is an AI workspace with 200+ models, agents, computers, and tasks. You can also access GPT OSS 20B through OpenAI's own API or platform.