Simon Willison adds Gemini 4 Argon support to llm-gemini 0.35
llm-gemini 0.35
- Who
- Simon Willison
- What
- added support the Gemini 4 Argon model in llm-gemini
- Quote
I added support to llm-gemini for the new Gemini 4 Argon model, made available today via the Gemini API and for customers of their $100/month subscription plan.
What happened
Simon Willison added Gemini 4 Argon support to llm-gemini, following the model’s availability today through the Gemini API and a $100/month subscription plan. He praised its SVG pelican illustrations, with the high illustration costing 17.166 cents. Argon launches at $2/million input and $10/million output, with prices set to double on December 1st; Artificial Analysis reports $2,407 to run its benchmark, which Willison considers a more useful comparison than per-token pricing.
The story so far
Google launched Gemini 4 Argon globally through paid developer services and subscriptions, with access expanding to Antigravity Pro users, Cursor and Perplexity. Sundar Pichai announced availability through the paid Gemini API and Gemini platform, for Pro and Ultra subscribers in the Gemini app and Search, and for Ultra subscribers in Antigravity. Baoyu reported that Antigravity added paid Pro subscribers through its desktop app, CLI and IDE extensions, with a separate weekly quota; that expansion excludes Antigravity IDE, Pro trials, free users and Plus subscribers. Perplexity announced access for Pro and Max subscribers, while CEO Aravind Srinivas said all Perplexity users could access Argon in fast search and Computer agent modes. API pricing is $2 per million input tokens and $10 per million output tokens through November 30, rising to $4 and $20 on December 1. Artificial Analysis found that Argon matched GPT-6 Astra on its Intelligence Index at 60% of Astra’s cost per task under introductory pricing. Epoch AI scored Argon at 165, tied with Fable 5.1 but behind Astra at 166 and Opus 5.5 at 167. The Decoder reported ARC-AGI-3 scores of 97.5% with the Provider Adapter Harness and 49.8% at low reasoning with the Standard Harness, where API problems prevented completion of all games. Google’s Gemini App account also said Argon can use Canvas to turn dense PDFs into interactive, animated web apps.
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