Claude Opus 4.5 vs Cydonia 24B V4.1: side-by-side summary

Claude Opus 4.5 and Cydonia 24B V4.1 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.

Cydonia 24B V4.1, from Drummer, has a 131,072-token context window and is priced at $0.30/M tokens input, $0.50/M tokens output on OpenRouter.

Context window

• Claude Opus 4.5: 200,000 tokens
• Cydonia 24B V4.1: 131,072 tokens

Price

• Claude Opus 4.5: $5/M tokens input, $25/M tokens output
• Cydonia 24B V4.1: $0.30/M tokens input, $0.50/M tokens output

Provided by

• Claude Opus 4.5: Anthropic
• Cydonia 24B V4.1: Drummer

• Claude Opus 4.5 model details, providers and pricing
• Cydonia 24B V4.1 model details, providers and pricing