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Claude Opus 4.5 vs Seed 1.6 Flash: side-by-side summary

Claude Opus 4.5 and Seed 1.6 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Opus 4.5, from Anthropic, has a 200,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.

Seed 1.6 Flash, from bytedance-seed, has a 262,144-token context window and is priced at $0.075/M tokens input, $0.30/M tokens output on OpenRouter.

Context window
  • Claude Opus 4.5: 200,000 tokens
  • Seed 1.6 Flash: 262,144 tokens
Price
  • Claude Opus 4.5: $5/M tokens input, $25/M tokens output
  • Seed 1.6 Flash: $0.075/M tokens input, $0.30/M tokens output
Provided by
  • Claude Opus 4.5: Anthropic
  • Seed 1.6 Flash: bytedance-seed
  • Claude Opus 4.5 model details, providers and pricing
  • Seed 1.6 Flash model details, providers and pricing