Grok 4.3 vs GLM-5.1

xAI's Grok 4.3 and Zhipu AI's GLM-5.1 compared on specs, pricing, and capabilities — as configured in AI Crucible ensembles.

Grok 4.3 input tokens are 1.1x cheaper than GLM-5.1 ($1.50 vs $1.68 per 1M tokens).
Grok 4.3 output tokens are 1.8x cheaper than GLM-5.1 ($3.00 vs $5.28 per 1M tokens).
Grok 4.3 offers the larger context window: 1M tokens vs 203K tokens for GLM-5.1.
Grok 4.3 accepts image inputs; GLM-5.1 is text-only in AI Crucible.

Specification	Grok 4.3	GLM-5.1
Provider	xAI	Zhipu AI
API model ID	grok-4.3	zai-org/GLM-5.1
Description	xAI's flagship Grok model with 1M context, supporting both reasoning and fast non-reasoning modes.	Z.AI's most advanced GLM model, optimized for long-horizon agentic tasks with interleaved reasoning.
Context window	1M tokens	203K tokens
Max output tokens	32,768	65,536
Input cost ($/1M tokens)	$1.50	$1.68
Output cost ($/1M tokens)	$3.00	$5.28
Cache read cost ($/1M tokens)	$0.24	-
Latency	medium	medium
Reasoning model	Yes	Yes
Vision (image input)	Yes	No
Tool use	Yes	Yes