Gemini is Google's AI product line; alternatives are computed against Google's current flagship model; The closest alternative to Gemini is Muse Spark 1.1 — comparable intelligence (50.6 vs 50.2); for a cheaper option, GPT-5.6 Luna runs $1.00/M vs $1.50/M; and the best open-weight substitute is GLM 5.2.
Muse Spark 1.1 is the closest alternative to Gemini, with an Intelligence Index of 50.6 (Gemini scores 50.2) at $1.25 per million input tokens.
Yes — GPT-5.6 Luna costs $1.00 per million input tokens versus $1.50 for Gemini, while staying within ~8 points of its Intelligence Index.
GLM 5.2 is the strongest open-weight alternative to Gemini — downloadable from Hugging Face and self-hostable, scoring 51.1 on intelligence.