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Release: llm-gemini 0.35 Simon Willison’s Weblog Newsletter 13th October 2026 Release llm-gemini 0.35 — LLM plugin to access Google's Gemini family of models 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. Here are the low, medium and high pelicans. As expected, they are all excellent: Gemini has a track record of producing great SVGs, and are the only lab where I know their staff have invested in SVG specifically (and who have boasted about their pelicans before.) Here's the "high" illustration, which cost me 17.166 cents: The pricing is interesting. At launch, Argon is $2/million input and $10/million output - the same price as GPT-6 Sol, half the price of Claude Opus 5.5 and 1/5th the price of Claude Fable 5.1 and GPT-6 Astra. But on December 1st Argon is set to double in price - so it will be the same price as Opus 5.5. Prices like this aren't really comparable these days since what really matters is how many tokens a model takes to achieve a goal within an agentic harness. One useful clue for that comes from Artificial Analysis, who publish the total cost to run their benchmark using each model. Argon is looking very good there - costing $2,407 to run the benchmark, putting it close to GLM-5.3 and significantly cheaper than OpenAI, Anthropic, and Meta's latest models. When the price doubles it will still be a little cheaper than GPT-6 Astra. (I used ChatGPT to edit that chart! The data is all correct, I checked - I needed to get that Gemini 4 Argon info box to display without overlapping the other numbers.) Recent articles Hello Python 3.15, goodbye 3.10, and now I can use 3.11 - 12th October 2026 A new feature for my blog, built using my voice - 9th October 2026 Claude Haiku 5.5 - 7th October 2026 We're going to need default hard budget caps on pretty much everything - 3rd October 2026 This is a beat by Simon Willison, posted on 13th October 2026. google 418 ai 2,279 generative-ai 2,021 llms 1,987 llm 639 gemini 199 llm-pricing 93 pelican-riding-a-bicycle 150 llm-release 237 Monthly briefing Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments. Pay me to send you less! Sponsor & subscribe Disclosures Colophon © 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026