GLM 5.3 vs Phi 4: side-by-side summary

GLM 5.3 and Phi 4 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.

Phi 4, from Microsoft, has a 16,384-token context window and is priced at $0.07/M tokens input, $0.14/M tokens output on OpenRouter.

Context window

• GLM 5.3: 1,048,576 tokens
• Phi 4: 16,384 tokens

Price

• GLM 5.3: $1.40/M tokens input, $4.40/M tokens output
• Phi 4: $0.07/M tokens input, $0.14/M tokens output

Provided by

• GLM 5.3: Z.ai
• Phi 4: Microsoft

• GLM 5.3 model details, providers and pricing
• Phi 4 model details, providers and pricing