Model comparison
Grok 4.5 vs o3
Capability radar, value bars, and side-by-side posture.
Grok 4.5
Not scored
value score
o3
93
value score
Grok 4.5 ctx
—
o3 ctx
200K
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- o393
Attribute tape
| Field | Grok 4.5 | o3 |
|---|---|---|
| Developer | Reuters | OpenAI |
| Context | — | 200K |
| Modalities | Text, Code | |
| Openness | — | Proprietary Model |
| Speed | — | — |
| Price | — | $10/1M in · $40/1M out |
| Value score | — | 93 |
| Summary | Grok 4.5 is xAI's frontier large language model optimized for coding and multi-step agentic tasks, available via the xAI API, Grok Build, and Cursor. | OpenAI reasoning model focused on hard problems. |