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.
Each bar is this model's score in that area. The white tick marks the best score any model Epoch has tested reaches there.
The index combines many benchmarks into one general-capability score; the range is how sure Epoch is of the number. Each area score is this site's average of the model's Epoch results in that area, where 0 is what guessing would score and 100 is perfect. Compare every model, and value for money →
Source: Epoch AI, Capabilities & benchmarking (licensed CC BY 4.0). Data refreshed 2 November 2026. These are Epoch's own tests; other benchmark sites can rank models differently.
Models within 5 points of gpt-oss-20b on Epoch's Capabilities Index that cost less, comparing a typical chat mix (three parts input to one part output). A few points of index is a small difference and says nothing about your task: a place to start testing, not a verdict. Capability against price for every model.
- 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 8 of the 340 models on the price list.
- Input $0.018 → $0.030 · Output $0.090 → $0.13
Want an email when this model's price changes? Tell us →
- GPT-5 Nano$0.050 in · $0.40 out
- gpt-oss-safeguard-20b$0.075 in · $0.30 out
- GPT-6 Luna Pro$0.10 in · $0.50 out
- GPT-6 Luna$0.10 in · $0.50 out
- GPT-4.1 Nano$0.10 in · $0.40 out
- gpt-oss-120b$0.15 in · $0.60 out
- GPT-4o-mini$0.15 in · $0.60 out
- GPT-4o-mini (2024-07-18)$0.15 in · $0.60 out
Prices and specifications come from OpenRouter’s catalogue, last read 2 Nov 2026. A provider’s own price may differ; how this is collected.