Gemini 3.5 Flash Lite vs Grok 4.20 (Reasoning)
Both have similar output pricing, while Gemini 3.5 Flash Lite offers a larger context window. Choose Gemini 3.5 Flash Lite or Grok 4.20 (Reasoning) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Gemini 3.5 Flash Lite | Grok 4.20 (Reasoning) |
|---|---|---|
| Provider | xAI | |
| Input / 1M tokens | $0.30 | $1.25 |
| Output / 1M tokens | $2.50 | $2.50 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Mar 2026 |
| LMArena (Chatbot Arena) Elo score | 1435 | — |
| LMArena WebDev Elo score | 1440 | — |
| LMArena Vision Elo score | 1268 | — |
| GPQA Diamond score | 83.3 | — |
| Epoch Capabilities Index score | 145 | — |
| LiveBench score | — | 69.0 |
FAQ
Is Gemini 3.5 Flash Lite or Grok 4.20 (Reasoning) cheaper?
Gemini 3.5 Flash Lite and Grok 4.20 (Reasoning) have comparable output pricing.
Which has the larger context window, Gemini 3.5 Flash Lite or Grok 4.20 (Reasoning)?
Gemini 3.5 Flash Lite has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.