FLUX.2 Klein 4B vs LFM2.5-1.2B-Thinking: side-by-side summary

FLUX.2 Klein 4B and LFM2.5-1.2B-Thinking are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

FLUX.2 Klein 4B, from black-forest-labs, has a 40,960-token context window and is priced at $0.014/megapixel on OpenRouter.

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

Context window

• FLUX.2 Klein 4B: 40,960 tokens
• LFM2.5-1.2B-Thinking: 32,768 tokens

Price

• FLUX.2 Klein 4B: $0.014/megapixel
• LFM2.5-1.2B-Thinking: Pricing varies by provider

Provided by

• FLUX.2 Klein 4B: black-forest-labs
• LFM2.5-1.2B-Thinking: Liquid

• FLUX.2 Klein 4B model details, providers and pricing
• LFM2.5-1.2B-Thinking model details, providers and pricing