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I've seen a lot of heads turn in the months since Opus 4.5 and GPT 5.1 were released. A lot of software developers going from "I use LLMs occassionaly" to "these models are good enough to use all the time."

As Simon Willison pointed out, this feels like a major inflection point in both the capabilities and adoption of LLMs:

November 2025 felt like an inflection point for coding agents, with Opus 4.5 and GPT 5.1 (and GPT-5.1 Codex) increasing the utility of those agents in a very noticeable way.