llm-gemini 0.35 adds Gemini 4 Argon with launch pricing

What the research found

Simon Willison released llm-gemini 0.35 adding Gemini 4 Argon support; launch price is 2 dollars input and 10 dollars output per million tokens, with a scheduled doubling on December 1 that conflicts with a Nov 30 date in #1015 and needs checking.

Claims and how well the evidence supports them

1. llm-gemini 0.35 adds support for Gemini 4 Argon 99%
2. Gemini 4 Argon launch price is 2 dollars per million input and 10 dollars per million output 99%
3. Argon price doubles on December 1 99%

Evidence

• simonwillison.net https://simonwillison.net/2026/Oct/13/llm-gemini

Actionability rated high.