Seed 2.1 Turbo vs GLM 5.1: side-by-side summary

Seed 2.1 Turbo and GLM 5.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Seed 2.1 Turbo, from bytedance-seed, has a 262,144-token context window and is priced at $0.50/M tokens input, $2.50/M tokens output on OpenRouter.

GLM 5.1, from Z.ai, has a 204,800-token context window and is priced at $0.966/M tokens input, $3.036/M tokens output on OpenRouter.

Context window

• Seed 2.1 Turbo: 262,144 tokens
• GLM 5.1: 204,800 tokens

Price

• Seed 2.1 Turbo: $0.50/M tokens input, $2.50/M tokens output
• GLM 5.1: $0.966/M tokens input, $3.036/M tokens output

Provided by

• Seed 2.1 Turbo: bytedance-seed
• GLM 5.1: Z.ai

• Seed 2.1 Turbo model details, providers and pricing
• GLM 5.1 model details, providers and pricing