Model comparison
Grok 4.5 vs Claude 4 Sonnet
Capability radar, value bars, and side-by-side posture.
Grok 4.5
Not scored
value score
Claude 4 Sonnet
91
value score
Grok 4.5 ctx
—
Claude 4 Sonnet ctx
200K
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- Claude 4 Sonnet91
Attribute tape
| Field | Grok 4.5 | Claude 4 Sonnet |
|---|---|---|
| Developer | Reuters | Anthropic |
| Context | — | 200K |
| Modalities | Text, Code, Image | |
| Openness | — | Proprietary Model |
| Speed | — | Fast |
| Price | — | $3/1M in · $15/1M out |
| Value score | — | 91 |
| Summary | Grok 4.5 is xAI's frontier mixture-of-experts language model optimized for coding, agentic workflows, and knowledge work, jointly developed with Cursor and available via the xAI API. | Balanced Claude model for coding and agents. |