GLM 5.3 vs Aion-3.0: side-by-side summary

GLM 5.3 and Aion-3.0 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GLM 5.3, from Z.ai, has a 1,048,576-token context window and is priced at $1.40/M tokens input, $4.40/M tokens output on OpenRouter.

Aion-3.0, from Aion Labs, has a 131,072-token context window and is priced at $3/M tokens input, $6/M tokens output on OpenRouter.

Context window

• GLM 5.3: 1,048,576 tokens
• Aion-3.0: 131,072 tokens

Price

• GLM 5.3: $1.40/M tokens input, $4.40/M tokens output
• Aion-3.0: $3/M tokens input, $6/M tokens output

Provided by

• GLM 5.3: Z.ai
• Aion-3.0: Aion Labs

• GLM 5.3 model details, providers and pricing
• Aion-3.0 model details, providers and pricing