Is Gemini 3.5 Flash or Grok 4 cheaper?

Gemini 3.5 Flash is cheaper on output tokens ($9.00 vs $15.00 per 1M).

Which has the larger context window, Gemini 3.5 Flash or Grok 4?

Gemini 3.5 Flash has the larger context window (1M tokens).

Gemini 3.5 Flash vs Grok 4

Gemini 3.5 Flash is cheaper on output tokens, while Gemini 3.5 Flash offers a larger context window. Choose Gemini 3.5 Flash or Grok 4 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Gemini 3.5 Flash	Grok 4
Provider	FastRouter	FastRouter
Input / 1M tokens	$1.50	$3.00
Output / 1M tokens	$9.00	$15.00
Context window	1M	256K
Parameters	—	3T
Open weights	No	No
Released	May 2026	Jul 2025

Gemini 3.5 Flash details →Grok 4 details →

FAQ

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