Claude Sonnet 4.5 vs Morph V3 Fast: side-by-side summary

Claude Sonnet 4.5 and Morph V3 Fast are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Sonnet 4.5, from Anthropic, has a 1,000,000-token context window and is priced at $3/M tokens input, $15/M tokens output on OpenRouter.

Morph V3 Fast, from morph, has a 81,920-token context window and is priced at $0.80/M tokens input, $1.20/M tokens output on OpenRouter.

Context window

• Claude Sonnet 4.5: 1,000,000 tokens
• Morph V3 Fast: 81,920 tokens

Price

• Claude Sonnet 4.5: $3/M tokens input, $15/M tokens output
• Morph V3 Fast: $0.80/M tokens input, $1.20/M tokens output

Provided by

• Claude Sonnet 4.5: Anthropic
• Morph V3 Fast: morph

• Claude Sonnet 4.5 model details, providers and pricing
• Morph V3 Fast model details, providers and pricing