Model comparison
GPT-OSS 20B (Free) vs o3
Capability radar, value bars, and side-by-side posture.
GPT-OSS 20B (Free)
Not scored
value score
o3
93
value score
GPT-OSS 20B (Free) ctx
—
o3 ctx
200K
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- o393
Attribute tape
| Field | GPT-OSS 20B (Free) | o3 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context | — | 200K |
| Modalities | Text, Code | |
| Openness | — | Proprietary Model |
| Speed | — | — |
| Price | — | $10/1M in · $40/1M out |
| Value score | — | 93 |
| 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 reasoning model focused on hard problems. |