Grok 4.20 Beta Reasoning (0309) (xAI) vs Grok 4.6
Both have similar output pricing, while Grok 4.20 Beta Reasoning (0309) (xAI) offers a larger context window. Choose Grok 4.20 Beta Reasoning (0309) (xAI) or Grok 4.6 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Grok 4.20 Beta Reasoning (0309) (xAI) | Grok 4.6 |
|---|---|---|
| Provider | LLM Gateway | SpaceXAI |
| Input / 1M tokens | $2.00 | $2.00 |
| Output / 1M tokens | $6.00 | $6.00 |
| Context window | 2M | 500K |
| Parameters | — | — |
| Open weights | No | — |
| Released | Mar 2026 | — |
| LMArena (Chatbot Arena) Elo score | — | 1428 |
| LMArena WebDev Elo score | — | 1617 |
| LMArena Vision Elo score | — | 1263 |
| GPQA Diamond score | — | 94.0 |
| Epoch Capabilities Index score | — | 156 |
FAQ
Is Grok 4.20 Beta Reasoning (0309) (xAI) or Grok 4.6 cheaper?
Grok 4.20 Beta Reasoning (0309) (xAI) and Grok 4.6 have comparable output pricing.
Which has the larger context window, Grok 4.20 Beta Reasoning (0309) (xAI) or Grok 4.6?
Grok 4.20 Beta Reasoning (0309) (xAI) has the larger context window (2M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.