Claude Sonnet 4.5 vs LFM2-8B-A1B: side-by-side summary

Claude Sonnet 4.5 and LFM2-8B-A1B 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.

LFM2-8B-A1B, from Liquid, has a 8,192-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Claude Sonnet 4.5: 1,000,000 tokens
• LFM2-8B-A1B: 8,192 tokens

Price

• Claude Sonnet 4.5: $3/M tokens input, $15/M tokens output
• LFM2-8B-A1B: Pricing varies by provider

Provided by

• Claude Sonnet 4.5: Anthropic
• LFM2-8B-A1B: Liquid

• Claude Sonnet 4.5 model details, providers and pricing
• LFM2-8B-A1B model details, providers and pricing