Grok 4.6 vs GLM 5.1: side-by-side summary

Grok 4.6 and GLM 5.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Grok 4.6, from SpaceXAI, has a 500,000-token context window and is priced at $2/M tokens input, $6/M tokens output on OpenRouter.

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.

Context window

• Grok 4.6: 500,000 tokens
• GLM 5.1: 204,800 tokens

Price

• Grok 4.6: $2/M tokens input, $6/M tokens output
• GLM 5.1: $0.966/M tokens input, $3.036/M tokens output

Provided by

• Grok 4.6: SpaceXAI
• GLM 5.1: Z.ai

• Grok 4.6 model details, providers and pricing
• GLM 5.1 model details, providers and pricing