Claude Sonnet 5.5 now available on AI Gateway
Vercel Blog: Claude Sonnet 5.5 from Anthropic is now available on AI Gateway as anthropic/claude-sonnet-5.5 . Claude Sonnet 5.5 now available on AI Gateway
By Dillip Chowdary โข Sep 30, 2026 โข Source: Vercel Blog
What shipped in Claude Sonnet 5.5 now available on AI Gateway

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Vercel Blog reports: Claude Sonnet 5.5 now available on AI Gateway. Claude Sonnet 5.5 from Anthropic is now available on AI Gateway as anthropic/claude-sonnet-5.5 . Sonnet 5.5 improves on Claude Sonnet 5 for well-scoped everyday work, from building features and fixing bugs to creating documents,
What you gain from Claude Sonnet 5.5 now available on AI Gateway
For primary quotes and complete technical detail, see Vercel Blog's original report linked above.
Developer Action Items
- โ Diff the official changelog for Anthropic / Claude / Sonnet 5.5 before you bump โ APIs, defaults, and removed flags only.
- โ Install through the vendor's documented channel in staging; keep a one-command rollback and time-box the canary.
- โ Grep your repo for old flag names, lockfile pins, and plugin versions that the notes mark as breaking.
- โ Prefer the first patch cut over the day-zero tag unless you have a reason to be on the leading edge.
- โ If Vercel Blog did not name a region, plan, or SKU, screenshot the official availability line before you promise it to users.
Author
Dillip Chowdary
Writes Tech Bytes coverage of AI, engineering, and the tools that actually ship. Editor of Tech Pulse Daily.
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