GLM 5.1 vs Gemma 4 31B: side-by-side summary

GLM 5.1 and Gemma 4 31B are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GLM 5.1, from Z.ai, has a 204,800-token context window and is priced at $0.966/M tokens input, $3.036/M tokens output on OpenRouter.

Gemma 4 31B, from Google, has a 262,144-token context window and is priced at $0.09/M tokens input, $0.34/M tokens output on OpenRouter.

Context window

• GLM 5.1: 204,800 tokens
• Gemma 4 31B: 262,144 tokens

Price

• GLM 5.1: $0.966/M tokens input, $3.036/M tokens output
• Gemma 4 31B: $0.09/M tokens input, $0.34/M tokens output

Provided by

• GLM 5.1: Z.ai
• Gemma 4 31B: Google

• GLM 5.1 model details, providers and pricing
• Gemma 4 31B model details, providers and pricing