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Wrote up some thoughts on Anthropic's Project Glassing, where their latest Opus-beating model is available to partnered security research organizations only. Given the recent alarm bells raised by credible security voices I think this is a justified decision. simonwillison.net/2026/Apr/7/p...

It's a bit wild to me how much Anthropic has gone from being a force for open that could call out OpenAI as not benefitting humanity to such a closed insular Neuromancer cyberpunk top down control company. I have sympathies here but its very scary pattern of dark behavior from a once bright crew. 🕯️

They are definitely fucking with us, adjusting knobs on how much context window we get. But yes, this is easily the best thing I've ever bought, without compare. I do note there are now weekly limits, which aren't a part of my grandfathered sub. But I don't think I'd hit them 80%+ of weeks.