HASTATAgent stack guide grok
Grok-4.1-Fast-Reasoning
Fast Grok model for responsive chat, reasoning, and tool-assisted work
Fresh · fetched 2026-08-17T02:11:57.739Z · Models.dev(opens in a new tab)
Minimum context2M
Output1M
Providers2
CapabilitiesTool calling, Reasoning, Image input
Provider offers
| Providers | Input / 1M | Output / 1M | Cache read / 1M | Context / output | Updated |
|---|---|---|---|---|---|
 Poexai/grok-4.1-fast-reasoning | Unavailable | Unavailable | Unavailable | 2M | 2025-11-19 |
 Vercel AI Gatewayxai/grok-4.1-fast-reasoning | $0.20 | $0.50 | $0.050 | 1M | 2025-07-09 |
Lowest reported provider price in USD per 1M tokens; unavailable is not free. Provider documentation remains authoritative. Catalogue presence is not an uptime, security, or quality endorsement.
Source metadata and limitations
Capabilities are source-reported. Tool calling does not prove quality in a particular harness. Prices and limits can change.
Modalities: text, image → text