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AgentVet Weekly — September 28, 2026
September 28, 2026
From the founderMeta's Muse launched last week and became the most downloaded app almost overnight. That tells me something important: there's real demand here, because it brings genuine value to people's daily lives, finally having something handle the annoying, repetitive tasks for them. But Muse is just the beginning. Many more personal agents are coming soon, from the big players like Google, Grok and other LLM providers. The ones that will win, though, won't be the biggest or the flashiest. They'll be the ones people trust most.
Simon Willison
Release: llm 0.36 New OpenAI models: gpt-6-sol for GPT-6 Sol and gpt-6-luna for GPT-6 Luna . #1702 Model plugins can now declare supports_conversation = False for models that only accept single-turn prompts. LLM raises llm.ConversationNotSupported when these models receive assist
Simon Willison
Yesterday was Grok 4.7 ( pelicans ) and MiMo v2.6 Flash/Pro ( more pelicans ). Today Anthropic released Claude Opus 5.5 , and around an hour later OpenAI released GPT-6 Sol and GPT-6 Luna . It's going to take a while to get a good read on all of these new models, but here are my
Simon Willison
Release: llm-anthropic 0.29 Adds support for Claude Opus 5.5 : llm -m claude-opus-5.5 "prompt goes here" Tags: llm , anthropic
Latent Space
overshadowing more efficient GPT6 models from OpenAI
OpenAI Blog
Using GPT-5.6, Ringg powers multilingual agents across voice, chat, WhatsApp, and web for 90% less cost vs. GPT-4.1.
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