Claude Opus 4.5 vs LFM2.5-1.2B-Instruct: side-by-side summary

Claude Opus 4.5 and LFM2.5-1.2B-Instruct 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.

LFM2.5-1.2B-Instruct, from Liquid, has a 32,768-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Claude Opus 4.5: 200,000 tokens
• LFM2.5-1.2B-Instruct: 32,768 tokens

Price

• Claude Opus 4.5: $5/M tokens input, $25/M tokens output
• LFM2.5-1.2B-Instruct: Pricing varies by provider

Provided by

• Claude Opus 4.5: Anthropic
• LFM2.5-1.2B-Instruct: Liquid

• Claude Opus 4.5 model details, providers and pricing
• LFM2.5-1.2B-Instruct model details, providers and pricing