OpenAI
gpt-oss-20b API pricing
gpt-oss-20b is OpenAI’s model on the API market, released 5 Aug 2025. Prices are per million tokens in USD, as last read from the price list.
$0.030Input / 1M
$0.13Output / 1M
131KContext
118KMax output
Specification
USD per million tokens- Provider
- OpenAI
- Model id
openai/gpt-oss-20b- Input
- $0.030
- Output
- $0.13
- Cached input
- $0.030
- Context window
- 131K tokens
- Maximum output
- 118K tokens
- Takes
- text
- Returns
- text
- Tool use
- Yes
- Reasoning
- Yes
- Released
- 5 Aug 2025
- First tracked
- 17 Sept 2026
At $0.030 per million input tokens, gpt-oss-20b is dearer than 6 of the 326 models on the price list.
Price changes
Tracked since 17 Sept 2026No price change has been recorded since tracking began on 17 Sept 2026. Prices are checked every six hours, and any change is listed here and on model changes.
More from OpenAI
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- gpt-oss-safeguard-20b$0.075 in · $0.30 out
- GPT-4.1 Nano$0.10 in · $0.40 out
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- GPT-5.6 Luna Pro$0.20 in · $1.20 out
- GPT-5.6 Luna$0.20 in · $1.20 out
Prices and specifications come from OpenRouter’s catalogue, last read 17 Sept 2026. A provider’s own price may differ; how this is collected.