Gemini 3.5 Flash vs Grok 4.20
Google vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.20 is cheaper ($1.25 vs $1.50 per 1M input)
- •Grok 4.20 has a larger context window (2M)
| Gemini 3.5 Flash | Grok 4.20 | |
|---|---|---|
| Intelligence index | 92.2 | — |
| Developer | xAI | |
| Type | Multimodal | LLM |
| Access | API only | API only |
| Context window | 1,048,576 tokens | 2,000,000 tokens |
| Input price | $1.50 / 1M | $1.25 / 1M |
| Output price | $9.00 / 1M | $2.50 / 1M |
| Speed | 221 tok/s | — |
| Released | May 19, 2026 | February 17, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | Text, Image |
| Output modalities | Text | Text |