Muse Spark 1.2 vs GLM 5.1: side-by-side summary

Muse Spark 1.2 and GLM 5.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Muse Spark 1.2, from Meta, has a 1,048,576-token context window and is priced at $1.25/M tokens input, $4.25/M tokens output on OpenRouter.

GLM 5.1, from Z.ai, has a 204,800-token context window and is priced at $0.91/M tokens input, $2.86/M tokens output on OpenRouter.

Context window

• Muse Spark 1.2: 1,048,576 tokens
• GLM 5.1: 204,800 tokens

Price

• Muse Spark 1.2: $1.25/M tokens input, $4.25/M tokens output
• GLM 5.1: $0.91/M tokens input, $2.86/M tokens output

Provided by

• Muse Spark 1.2: Meta
• GLM 5.1: Z.ai

• Muse Spark 1.2 model details, providers and pricing
• GLM 5.1 model details, providers and pricing