GLM-5.3-Flash

GLM-5.3-Flash is a native multimodal GLM model from Z.ai (Zhipu, GLM) designed for efficient coding and long-horizon agent tasks. It sits in the glm-flash line, released on 2026-08-26, following the previous version GLM-4.7-FlashX.

Against GLM-4.7-FlashX: window 200K to 1M, input $0.06 to $0.03, output $0.40 to $0.025, cached input $0.01 to $0.006.

Range across the hosts that serve it: up to $0.45 per 1M input tokens.

• ·1,000,000 token context window
• ·131,072 token max output
• ·Accepts image, pdf, text, and video
• ·Supports reasoning mode and tool calling
• ·Open weights with 59 hosting options

• Reach for it for long-horizon agent tasks
• Reach for it for efficient coding workflows
• Reach for it for multimodal input processing
• Reach for it for low-cost high-volume inference

59 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 and output limit?

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

Does it support tool calling and reasoning?

Yes, it supports both reasoning mode and tool calling.

What is the price per token?

Input costs from $0.03 per million tokens, output from $0.025 per million, and cached input from $0.006 per million.