Model comparison
GPT-5.5 vs o3
Capability radar, value bars, and side-by-side posture.
GPT-5.5
Not scored
value score
o3
93
value score
GPT-5.5 ctx
—
o3 ctx
200K
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- o393
Attribute tape
| Field | GPT-5.5 | 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-5.5 is OpenAI's frontier general-purpose model designed for complex, tool-heavy knowledge work and agentic workflows, including code writing and debugging, multi-step research, and computer-use tasks. OpenAI positions it as its 'smartest and most intuitive' model, optimized for execution quality and production agentic use over raw benchmark performance. | OpenAI reasoning model focused on hard problems. |