Is GPT-6 Astra or Grok 4.1 Fast cheaper?

Grok 4.1 Fast is cheaper on output tokens ($0.50 vs $50.00 per 1M).

Which has the larger context window, GPT-6 Astra or Grok 4.1 Fast?

Grok 4.1 Fast has the larger context window (2M tokens).

GPT-6 Astra vs Grok 4.1 Fast

Grok 4.1 Fast is cheaper on output tokens, while Grok 4.1 Fast offers a larger context window. Choose GPT-6 Astra or Grok 4.1 Fast based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-6 Astra	Grok 4.1 Fast
Provider	ZenMux	ZenMux
Input / 1M tokens	$10.00	$0.20
Output / 1M tokens	$50.00	$0.50
Context window	1.1M	2M
Parameters	—	—
Open weights	No	No
Released	Sep 2026	Nov 2025

GPT-6 Astra details →Grok 4.1 Fast details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.