Overview
Claude Opus 5 (Fast) vs Muse Spark 1.2: side-by-side summary
Claude Opus 5 (Fast) and Muse Spark 1.2 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Opus 5 (Fast), from Anthropic, has a 1,000,000-token context window and is priced by the provider serving it on OpenRouter.
Muse Spark 1.2, from Meta, has a 1,048,576-token context window and is priced at $1.25/M tokens input, $4.25/M tokens output on OpenRouter.
- Context window
- Claude Opus 5 (Fast): 1,000,000 tokens
- Muse Spark 1.2: 1,048,576 tokens
- Price
- Claude Opus 5 (Fast): Pricing varies by provider
- Muse Spark 1.2: $1.25/M tokens input, $4.25/M tokens output
- Provided by
- Claude Opus 5 (Fast): Anthropic
- Muse Spark 1.2: Meta