Gemini 3.5 Flash vs Grok 4.5

Google's Gemini 3.5 Flash and xAI's Grok 4.5 compared on specs, pricing, and capabilities — as configured in AI Crucible ensembles.

Gemini 3.5 Flash input tokens are 1.3x cheaper than Grok 4.5 ($1.80 vs $2.40 per 1M tokens).
Grok 4.5 output tokens are 1.5x cheaper than Gemini 3.5 Flash ($7.20 vs $10.80 per 1M tokens).
Gemini 3.5 Flash offers the larger context window: 1M tokens vs 500K tokens for Grok 4.5.

Specification	Gemini 3.5 Flash	Grok 4.5
Provider	Google	xAI
API model ID	gemini-3.5-flash	grok-4.5
Description	Google's latest Flash model, frontier reasoning and multimodal quality at high speed with 1M context.	xAI's most intelligent and fastest Grok model, built for coding and agentic work.
Context window	1M tokens	500K tokens
Max output tokens	65,536	32,768
Input cost ($/1M tokens)	$1.80	$2.40
Output cost ($/1M tokens)	$10.80	$7.20
Cache read cost ($/1M tokens)	$0.18	$0.60
Latency	low	medium
Reasoning model	Yes	Yes
Vision (image input)	Yes	Yes
Tool use	Yes	Yes