Grok 4.3 vs Grok 4.20 (Reasoning)
Both have similar output pricing. Choose Grok 4.3 or Grok 4.20 (Reasoning) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Grok 4.3 | Grok 4.20 (Reasoning) |
|---|---|---|
| Provider | SpaceXAI | xAI |
| Input / 1M tokens | $1.25 | $1.25 |
| Output / 1M tokens | $2.50 | $2.50 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Mar 2026 |
| LiveBench score | 67.4 | 69.0 |
| GPQA Diamond score | 88.8 | — |
| LMArena (Chatbot Arena) Elo score | 1397 | — |
| LMArena WebDev Elo score | 1357 | — |
| LMArena Vision Elo score | 1229 | — |
FAQ
Is Grok 4.3 or Grok 4.20 (Reasoning) cheaper?
Grok 4.3 and Grok 4.20 (Reasoning) have comparable output pricing.
Which has the larger context window, Grok 4.3 or Grok 4.20 (Reasoning)?
Both models offer a similar context window.
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.