OpenAI models in general, yes - `opencode auth login`, select OpenAI, then ChatGPT Pro/Plus. I just checked and 5.3-codex isn't available in opencode yet, but I assume it will be soon.
You can also use via Opencode Zen, Github Copilot, or probably any number of other model providers that Opencode integrates with.
Not sure why everyone stays focused on getting it from Anthropic or OpenAI directly when there are so many places to get access to these models and many others for the same or less money.
I've tried opus 4.5 in opencode via the GitHub Copilot API, mostly to see if it works all. I don't think that broke any terms of service? But also I haven't checked how much more expensive I made it for myself over just calling them directly.
my father in law has a vw caddy (sdi). it has something like 120k in it even though it looks beaten up. i once told him I'm surprised. he told me that's 1.120.000km as the analog dial goes back to 0 after a million
Without persistent data structures (structural sharing) - every change requires copying the entire data structure, memory usage explodes, time complexity suffers, GC pressure increases dramatically.
With persistent data structures - only the changed parts are new; unchanged parts are shared between versions; adding to a list might only create a few new nodes while reusing most of the structure; it's memory efficient, time efficient, multiple versions can coexist cheaply. And you get countless benefits - fearless concurrency, easier reasoning, elimination of whole class of bugs.
I would also block/reject a person like this. I had my fair share of these phishing attemts so I'm not asking questions if someone is trying to touch my infra.
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