Gemini 4 Argon

Gemini 4 Argon is Google's top model in our list, released 2026-10-13. OpenRouter shows $2 per million input tokens and $10 output, a 1,048,576-token context, and audio, PDF, image, text and video input with text output. Our Google AI provider page notes that Argon is priced at that rate only until 30 November 2026, so we treat the price as promotional and recheck it. It is closed, with no weights to download. We would suggest it for work that mixes long documents with audio or video, since few models take all those inputs in one call. The limit is the price date: a budget built on the current rate may change after the promotion ends, and Flash models cost far less for simpler jobs. Prices and specifications come from the OpenRouter listing we checked on 31 October 2026, and we have not tested the model ourselves.