Muse Spark 1.2 Contributor vs GLM 5.3 Flash: side-by-side summary

Muse Spark 1.2 Contributor and GLM 5.3 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Muse Spark 1.2 Contributor, from Meta, has a 1,048,576-token context window and is priced at $0.10/M tokens input, $0.20/M tokens output on OpenRouter.

GLM 5.3 Flash, from Z.ai, has a 1,048,576-token context window and is priced at $0.075/M tokens input, $0.25/M tokens output on OpenRouter.

Context window

• Muse Spark 1.2 Contributor: 1,048,576 tokens
• GLM 5.3 Flash: 1,048,576 tokens

Price

• Muse Spark 1.2 Contributor: $0.10/M tokens input, $0.20/M tokens output
• GLM 5.3 Flash: $0.075/M tokens input, $0.25/M tokens output

Provided by

• Muse Spark 1.2 Contributor: Meta
• GLM 5.3 Flash: Z.ai

• Muse Spark 1.2 Contributor model details, providers and pricing
• GLM 5.3 Flash model details, providers and pricing