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OpenAI: gpt-oss-20b API Pricing
gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...
How much does OpenAI: gpt-oss-20b cost for a real workload?
At 10M input + 2M output tokens per month, OpenAI: gpt-oss-20b costs about $0.36 ($0.18 input + $0.18 output). Try your own volumes in the cost calculator.
What are cheaper alternatives to OpenAI: gpt-oss-20b?
- Google: Gemma 3 4B — $0.04 in / $0.05 out per 1M
- Sao10K: Llama 3 8B Lunaris — $0.04 in / $0.05 out per 1M
- inclusionAI: Ling 3.0 Flash — $0.021 in / $0.063 out per 1M
- Mistral: Mistral Nemo — $0.029 in / $0.03 out per 1M
- ScaleDown: Summarize — $0.04 in / Free out per 1M
- ScaleDown: Extract — $0.04 in / Free out per 1M
Compare OpenAI: gpt-oss-20b with other models
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Frequently asked questions
How much does OpenAI: gpt-oss-20b cost?
OpenAI: gpt-oss-20b costs $0.018 per 1M input tokens and $0.09 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $0.36.
What is the context window of OpenAI: gpt-oss-20b?
OpenAI: gpt-oss-20b has a context window of 131,072 tokens and can return up to 32,768 output tokens per response.
What are cheaper alternatives to OpenAI: gpt-oss-20b?
Cheaper models include Google: Gemma 3 4B ($0.04 in / $0.05 out), Sao10K: Llama 3 8B Lunaris ($0.04 in / $0.05 out), inclusionAI: Ling 3.0 Flash ($0.021 in / $0.063 out). See the full list on this page.
Is OpenAI: gpt-oss-20b free to use?
No. OpenAI: gpt-oss-20b is a paid model at $0.018 input / $0.09 output per 1M tokens. 20 free models are listed on the free models page.
Provider: openai · Model ID: openai/gpt-oss-20b · Modality: text->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices