OpenAI Parameter Count (117B)
OpenAI's largest listed model is gpt-oss-120b at 117B parameters.
Data sourced from OpenRouter API and manual data collection | Last updated: Nov 3, 2026, 8:01 AM UTC
Mixture-of-experts models
| Model Name | Total | Active | Size Score | |
|---|---|---|---|---|
| 21B | 3.6B | 33 |
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Dense models
| Model Name | Total | Active | Size Score | |
|---|---|---|---|---|
| 117B | Undisclosed | 52 | ||
| 21B | Undisclosed | 33 |
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Frequently asked questions
How many parameters do OpenAI models have?
OpenAI's largest listed model is gpt-oss-120b at 117B parameters.