Overview
Claude Opus 5.5 vs Seed 2.1 Turbo: side-by-side summary
Claude Opus 5.5 and Seed 2.1 Turbo are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Opus 5.5, from Anthropic, has a 1,000,000-token context window and is priced at $4/M tokens input, $20/M tokens output on OpenRouter.
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.
- Context window
- Claude Opus 5.5: 1,000,000 tokens
- Seed 2.1 Turbo: 262,144 tokens
- Price
- Claude Opus 5.5: $4/M tokens input, $20/M tokens output
- Seed 2.1 Turbo: $0.50/M tokens input, $2.50/M tokens output
- Provided by
- Claude Opus 5.5: Anthropic
- Seed 2.1 Turbo: bytedance-seed