GLM-5.3

GLM-5.3 is the flagship model in the GLM line from Z.ai (Zhipu). It is designed for long-horizon coding, agents, and complex project delivery. It has a context window of 1,000,000 tokens and a maximum output of 131,072 tokens. It accepts and returns text. It supports reasoning mode and tool calling. The weights are open. Pricing starts at $0.40 per million input tokens and $1.40 per million output tokens, with cached input at $0.06 per million tokens.

Against GLM-5.2: input $0.30 to $0.40, output $1.05 to $1.40, cached input $0.05 to $0.06.

Range across the hosts that serve it: up to $2.80 per 1M input tokens.

• ·1,000,000 token context window
• ·131,072 token max output
• ·Supports reasoning mode and tool calling
• ·Open weights for self-hosting
• ·Built for long-horizon coding and agents

• Reach for it for long-horizon coding projects
• Reach for it for building autonomous agents
• Reach for it for complex project delivery
• Reach for it for tasks needing a million-token context

57 hosts serve this model at the price above · the maker's documentation

The registry keeps the six most recent versions of a line. Older ones stay in the file and can be surfaced without a rebuild.

How large is the context window?

The context window is 1,000,000 tokens, and the maximum output is 131,072 tokens.

Is the model open weights?

Yes, the weights are open.

What is the pricing?

Input from $0.40 per million tokens, output from $1.40 per million tokens, cached input from $0.06 per million tokens.