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Free Claude Sonnet 5 for Coding: No API Key, No Signup

This story is from 2026-09-25. It is preserved in the archive; the latest stories are on the live feed.

Claude Sonnet 5 is Anthropic's flagship reasoning model — the one developers reach for when code actually has to work. Extended thinking, strong programming ability, careful reasoning. Normally you'd need an API key or a Pro subscription. On Toolxz AI Chat , it's free in the browser with no signup.…

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  1. 2026-09-25 11:29 · DEV Community — AI
    Free Claude Sonnet 5 for Coding: No API Key, No Signup

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