gpt-oss-20b pricing & price history
gpt-oss-20b by OpenAI costs $0.03 per 1M input tokens and $0.13 per 1M output tokens, with a 131K token context window.
Price history
| Date | Input | Output |
|---|---|---|
| 2026-11-01 | $0.018 → $0.03 +67% | $0.09 → $0.13 +44% |
Cost calculator
Cheaper alternatives to gpt-oss-20b
| Model | Input | Output | Context | Intel. | |
|---|---|---|---|---|---|
 GLM 5.3 Flash Z.ai (Zhipu) | $0.0399 | $0.0784 | 1M | 27.8 | compare |
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About gpt-oss-20b
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...
FAQ
How much does gpt-oss-20b cost?
gpt-oss-20b by OpenAI costs $0.03 per 1M input tokens and $0.13 per 1M output tokens, with a 131K token context window. A typical request with 2,000 input and 500 output tokens costs about $0.0001.
What is the context window of gpt-oss-20b?
gpt-oss-20b supports up to 131,072 tokens of context and up to 117,964 output tokens per request.
Has gpt-oss-20b’s price changed?
Yes. ModelBank recorded 1 price change; the latest on 2026-11-01.
Is gpt-oss-20b being deprecated?
No retirement date has been announced for gpt-oss-20b as of 2026-11-12.
What are cheaper alternatives to gpt-oss-20b?
Cheaper options include GLM 5.3 Flash ($0.0399/$0.0784).