Seed 2.1 Turbo vs Claude Opus 5: side-by-side summary

Seed 2.1 Turbo and Claude Opus 5 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.

Claude Opus 5, from Anthropic, has a 1,000,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.

Context window

• Seed 2.1 Turbo: 262,144 tokens
• Claude Opus 5: 1,000,000 tokens

Price

• Seed 2.1 Turbo: $0.50/M tokens input, $2.50/M tokens output
• Claude Opus 5: $5/M tokens input, $25/M tokens output

Provided by

• Seed 2.1 Turbo: bytedance-seed
• Claude Opus 5: Anthropic

• Seed 2.1 Turbo model details, providers and pricing
• Claude Opus 5 model details, providers and pricing