Authentication changedauthentication
Nearest release: v2.1.293, published under an hour before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Upstream edited this page at 7 Oct 2026 17:28 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 7 Oct 2026 17:37 UTC.
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77## Log in to Claude Code
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9After [installing Claude Code](/docs/en/setup#install-claude-code), run `claude` in your terminal. On first launch, Claude Code opens a browser window for you to log in. If you've set the `ANTHROPIC_API_KEY` environment variable, Claude Code skips the login prompt and asks you to approve the key instead.
9After [installing Claude Code](/docs/en/setup#install-claude-code), run `claude` in your terminal. On first launch, Claude Code opens a browser window for you to log in. If you've set the `ANTHROPIC_API_KEY` environment variable and you approve the key when Claude Code asks whether to use it, Claude Code skips the login prompt.
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1111If the browser doesn't open automatically, press `c` to copy the login URL to your clipboard, then paste it into your browser.
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