Grok 3 Mini vs Grok-4-Fast-Reasoning
Both have similar output pricing, while Grok-4-Fast-Reasoning offers a larger context window. Choose Grok 3 Mini or Grok-4-Fast-Reasoning based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Grok 3 Mini | Grok-4-Fast-Reasoning |
|---|---|---|
| Provider | Poe | Poe |
| Input / 1M tokens | $0.30 | $0.20 |
| Output / 1M tokens | $0.50 | $0.50 |
| Context window | 131K | 2M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Apr 2025 | Sep 2025 |
FAQ
Is Grok 3 Mini or Grok-4-Fast-Reasoning cheaper?
Grok 3 Mini and Grok-4-Fast-Reasoning have comparable output pricing.
Which has the larger context window, Grok 3 Mini or Grok-4-Fast-Reasoning?
Grok-4-Fast-Reasoning 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.