Google describes it as strong at math and science, and it has a top smartness rating (5 of 5). Our editorial pick; we have not tested how well it tutors.
Made by Google, the company behind Gemini. Smartness: ★★★★★ (5 of 5) Reads at once: about 1,570 pages 1,000-word essay: $0.01 (about 1 cent) 50-page PDF summary: $0.07 (about 7 cents)
Gemini app with the lightest model, image generation and editing, Deep Research, Gemini Live, 15 GB storage.
Standard usage; no numbers published. Checked 2026-10-16; free plans can change. See every app's free plan.
What a 100-message chat costs with each pick
The best pick costs $2.62; the budget pick costs $0.19 (about 19 cents). These are developer prices, so they show relative cost, not your monthly bill.
Bar scale
DeepSeek V4.1 Flash (budget pick)$0.19
Gemini 4 Argon (best pick)$2.62
Show the data as a table
Model
Cost of a 100-message chat
DeepSeek V4.1 Flash (budget pick)
$0.19 (about 19 cents)
Gemini 4 Argon (best pick)
$2.62
Bars use a straight scale: a bar twice as long means twice the cost. Only the two picks above. Source: OpenRouter list prices and the assumptions on How we work.