GLM 5.3 vs Gemini 3.6 Flash: side-by-side summary

GLM 5.3 and Gemini 3.6 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GLM 5.3, from Z.ai, has a 1,048,576-token context window and is priced at $1.40/M tokens input, $4.40/M tokens output on OpenRouter.

Gemini 3.6 Flash, from Google, has a 1,048,576-token context window and is priced at $0.75/M tokens input, $3.75/M tokens output on OpenRouter.

Context window

• GLM 5.3: 1,048,576 tokens
• Gemini 3.6 Flash: 1,048,576 tokens

Price

• GLM 5.3: $1.40/M tokens input, $4.40/M tokens output
• Gemini 3.6 Flash: $0.75/M tokens input, $3.75/M tokens output

Provided by

• GLM 5.3: Z.ai
• Gemini 3.6 Flash: Google

• GLM 5.3 model details, providers and pricing
• Gemini 3.6 Flash model details, providers and pricing