name = "Grok 4 Fast"
description = "Fast Grok model for responsive chat, reasoning, and tool-assisted work"
family = "grok"
release_date = "2025-09-19"
last_updated = "2025-09-19"
attachment = true
reasoning = true
reasoning_options = []
temperature = true
tool_call = true
knowledge = "2025-01"
open_weights = false

[cost]
input = 0.2
output = 0.5
cache_read = 0.05
cache_write = 0.2

[limit]
context = 2_000_000
output = 64_000

[modalities]
input = ["text"]
output = ["text"]