GLM 5.2 vs Gemini 3.5 Flash: side-by-side summary

GLM 5.2 and Gemini 3.5 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GLM 5.2, from Z.ai, has a 1,048,576-token context window and is priced at $0.49/M tokens input, $1.54/M tokens output on OpenRouter.

Gemini 3.5 Flash, from Google, has a 1,048,576-token context window and is priced at $1.50/M tokens input, $9/M tokens output on OpenRouter.

Context window

• GLM 5.2: 1,048,576 tokens
• Gemini 3.5 Flash: 1,048,576 tokens

Price

• GLM 5.2: $0.49/M tokens input, $1.54/M tokens output
• Gemini 3.5 Flash: $1.50/M tokens input, $9/M tokens output

Provided by

• GLM 5.2: Z.ai
• Gemini 3.5 Flash: Google

• GLM 5.2 model details, providers and pricing
• Gemini 3.5 Flash model details, providers and pricing