Mercury 2.5 Preview vs GLM 5.3 Flash: side-by-side summary

Mercury 2.5 Preview 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.

Mercury 2.5 Preview, from inception, has a 260,000-token context window and is priced at $0.04/M tokens input, $0.15/M tokens output on OpenRouter.

GLM 5.3 Flash, from Z.ai, has a 1,310,720-token context window and is priced at $0.075/M tokens input, $0.25/M tokens output on OpenRouter.

Context window

• Mercury 2.5 Preview: 260,000 tokens
• GLM 5.3 Flash: 1,310,720 tokens

Price

• Mercury 2.5 Preview: $0.04/M tokens input, $0.15/M tokens output
• GLM 5.3 Flash: $0.075/M tokens input, $0.25/M tokens output

Provided by

• Mercury 2.5 Preview: inception
• GLM 5.3 Flash: Z.ai

• Mercury 2.5 Preview model details, providers and pricing
• GLM 5.3 Flash model details, providers and pricing