GLM 5.3 Flash vs Seed-2.0-Code: side-by-side summary

GLM 5.3 Flash and Seed-2.0-Code are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

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.

Seed-2.0-Code, from bytedance-seed, has a 262,144-token context window and is priced at $0.50/M tokens input, $3/M tokens output on OpenRouter.

Context window

• GLM 5.3 Flash: 1,048,576 tokens
• Seed-2.0-Code: 262,144 tokens

Price

• GLM 5.3 Flash: $0.075/M tokens input, $0.25/M tokens output
• Seed-2.0-Code: $0.50/M tokens input, $3/M tokens output

Provided by

• GLM 5.3 Flash: Z.ai
• Seed-2.0-Code: bytedance-seed

• GLM 5.3 Flash model details, providers and pricing
• Seed-2.0-Code model details, providers and pricing