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About Svelte, on the svelte subreddit it was reported that GPT 5.2 is better at Svelte, perhaps because it has a more recent knowledge cutoff

But anyway you should set up the Svelte MCP

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I take these early reports (less than a week or two after a major model release) with a grain of salt. It takes time to get to know a model, and maybe there's some selection bias in who's posting within 1-2 days of getting access.

(Although in this particular case, the very different knowledge cutoff makes it a lot easier to believe)

Just for reference I was referring to this

https://old.reddit.com/r/sveltejs/comments/1pkzwqd/gpt52_hug... https://github.com/khromov/svelte-bench https://khromov.github.io/svelte-bench/benchmark-results-mer...

But OpenAI was caught before cheating on benchmarks so indeed it may not mean much

Also the Svelte MCP is https://svelte.dev/docs/mcp/overview IMO it's a must. Besides giving access to up to date documentation, there's a tool that the LLM can call that lints and fixes issues (svelte-autofixer)

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