GLM-5.3-FlashX

GLM-5.3-FlashX is a high-speed serving option from Z.ai for coding and agent workflows. It is part of the glm-flash line, released after GLM-5.3-Flash on 2026-09-18. It has a 1,000,000 token context window and a 131,072 token output limit. Weights are open. It supports reasoning mode and tool calling. It accepts image, pdf, text, and video, and returns text. Price starts at $0.15 per million input tokens and $0.50 per million output tokens, with cached input at $0.03 per million tokens.

Against GLM-5.3-Flash: input $0.03 to $0.15, output $0.025 to $0.50, cached input $0.006 to $0.03.

Range across the hosts that serve it: up to $0.375 per 1M input tokens.

• ·1M token context window
• ·131K token max output
• ·Open weights
• ·Supports reasoning and tool calling
• ·Accepts image, pdf, text, video

• Reach for it for coding and agent workflows
• Reach for it for long-context tasks
• Reach for it for multimodal input processing

8 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.

What is the context window size?

The context window is 1,000,000 tokens.

Is GLM-5.3-FlashX open weights?

Yes, the weights are open.

What is the pricing?

From $0.15 per million input tokens and $0.50 per million output tokens. Cached input is $0.03 per million tokens.