Solar Pro 4 vs GLM 5.3 Flash: side-by-side summary

Solar Pro 4 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.

Solar Pro 4, from upstage, has a 524,288-token context window and is priced at $0.03/M tokens input, $0.12/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

• Solar Pro 4: 524,288 tokens
• GLM 5.3 Flash: 1,048,576 tokens

Price

• Solar Pro 4: $0.03/M tokens input, $0.12/M tokens output
• GLM 5.3 Flash: $0.075/M tokens input, $0.25/M tokens output

Provided by

• Solar Pro 4: upstage
• GLM 5.3 Flash: Z.ai

• Solar Pro 4 model details, providers and pricing
• GLM 5.3 Flash model details, providers and pricing