llm-gemini 0.37

Google launched Gemini 4 Hydrogen, the lowest-cost member of the Gemini 4 family, priced at $1.50/M input, $0.075/M cached input and $7.50/M output, compared with Carbon and Argon at $2.00/$0.10/$10.00 through Nov 30, 2026, doubling from Dec 1, 2026. The post notes Carbon and Argon share the same price, that Hydrogen is only a 25% discount until December 1st (then 75%), and that it remains far more expensive than Claude Haiku 5.5 and GPT-6 Luna at $0.10/$0.50. Hydrogen is described as the new free tier model and the model powering AI features in Google Search.