GPT-6 Astra vs GLM-5.3

OpenAI's GPT-6 Astra and Zhipu AI's GLM-5.3 compared on specs, pricing, and capabilities — as configured in AI Crucible ensembles.

GLM-5.3 input tokens are 7.1x cheaper than GPT-6 Astra ($1.68 vs $12.00 per 1M tokens).
GLM-5.3 output tokens are 11.4x cheaper than GPT-6 Astra ($5.28 vs $60.00 per 1M tokens).
GPT-6 Astra offers the larger context window: 1.05M tokens vs 1M tokens for GLM-5.3.
GPT-6 Astra accepts image inputs; GLM-5.3 is text-only in AI Crucible.

Specification	GPT-6 Astra	GLM-5.3
Provider	OpenAI	Zhipu AI
API model ID	gpt-6-astra	zai-org/GLM-5.3
Description	OpenAI's most capable model, built for the hardest end-to-end work, with 1M context.	Z.AI's frontier open-weight model for coding and agentic work, with always-on reasoning and 1M context.
Context window	1.05M tokens	1M tokens
Max output tokens	128,000	131,072
Input cost ($/1M tokens)	$12.00	$1.68
Output cost ($/1M tokens)	$60.00	$5.28
Cache read cost ($/1M tokens)	$1.20	$0.31
Latency	high	medium
Reasoning model	Yes	Yes
Vision (image input)	Yes	No
Tool use	Yes	Yes