Grok-4-Fast-Reasoning vs Grok-4.20-Multi-Agent
Grok-4-Fast-Reasoning is cheaper on output tokens, while Grok-4-Fast-Reasoning offers a larger context window. Choose Grok-4-Fast-Reasoning or Grok-4.20-Multi-Agent based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Grok-4-Fast-Reasoning | Grok-4.20-Multi-Agent |
|---|---|---|
| Provider | Poe | Poe |
| Input / 1M tokens | $0.20 | $2.00 |
| Output / 1M tokens | $0.50 | $6.00 |
| Context window | 2M | 128K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Sep 2025 | Mar 2026 |
FAQ
Is Grok-4-Fast-Reasoning or Grok-4.20-Multi-Agent cheaper?
Grok-4-Fast-Reasoning is cheaper on output tokens ($0.50 vs $6.00 per 1M).
Which has the larger context window, Grok-4-Fast-Reasoning or Grok-4.20-Multi-Agent?
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.