Model comparison
GPT-OSS 20B (Free) vs GPT-5
Capability radar, value bars, and side-by-side posture.
GPT-OSS 20B (Free)
Not scored
value score
GPT-5
94
value score
GPT-OSS 20B (Free) ctx
—
GPT-5 ctx
400K
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- GPT-594
Attribute tape
| Field | GPT-OSS 20B (Free) | GPT-5 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context | — | 400K |
| Modalities | Text, Code, Image, Audio | |
| Openness | — | Proprietary Model |
| Speed | — | Fast |
| Price | — | Mid-High |
| Value score | — | 94 |
| Summary | GPT-OSS 20B is OpenAI's open-weight reasoning model released under Apache 2.0, featuring 21B total parameters with 3.6B active per forward pass via a Mixture-of-Experts architecture. It is designed for local or consumer-grade hardware deployment and supports tool use, function calling, structured outputs, and configurable reasoning effort. | OpenAI frontier multimodal model. |