Which is cheaper, ChatGPT or Z.AI GLM?

ChatGPT is 2.3x cheaper than Z.AI GLM. ChatGPT starts at $0/mo, Z.AI GLM starts at $18/mo.

Does ChatGPT have a free tier?

Yes, ChatGPT offers a free tier with .

ChatGPT has drop-in switching cost. Z.AI GLM has drop-in switching cost. Both have similar switching complexity.

Ai Coding

ChatGPT

← More affordable

OpenAI's AI assistant with coding agent, canvas editor, and frontier model access for software development

Switching Cost: drop-in

Z.AI GLM

Zhipu AI's GLM models with tiered coding subscriptions for AI-assisted development and code generation

Switching Cost: drop-in

The cost difference is substantial — Z.AI GLM runs about 2.3x what ChatGPT charges.

Startups take note: ChatGPT provides a free tier, while Z.AI GLM requires payment from day one.

If budget is your primary constraint, ChatGPT is the clear winner with its more wallet-friendly pricing structure.

If budget is your primary constraint, ChatGPT is the clear winner with its more wallet-friendly pricing structure.

Price Difference

2.3x

ChatGPT is cheaper by $10/mo

Free Tier

ChatGPT

Has a free tier option