GLM 5.3 Flash vs DeepSeek V4 Pro 0813: side-by-side summary

GLM 5.3 Flash and DeepSeek V4 Pro 0813 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GLM 5.3 Flash, from Z.ai, has a 1,048,576-token context window and is priced at $0.075/M tokens input, $0.25/M tokens output on OpenRouter.

DeepSeek V4 Pro 0813, from DeepSeek, has a 1,048,576-token context window and is priced at $0.5808/M tokens input, $1.742/M tokens output on OpenRouter.

Context window

• GLM 5.3 Flash: 1,048,576 tokens
• DeepSeek V4 Pro 0813: 1,048,576 tokens

Price

• GLM 5.3 Flash: $0.075/M tokens input, $0.25/M tokens output
• DeepSeek V4 Pro 0813: $0.5808/M tokens input, $1.742/M tokens output

Provided by

• GLM 5.3 Flash: Z.ai
• DeepSeek V4 Pro 0813: DeepSeek

• GLM 5.3 Flash model details, providers and pricing
• DeepSeek V4 Pro 0813 model details, providers and pricing