Anthropic · releasedClaude Sonnet 5.5

Unverified: one source, not a primary one. Asserted once a primary source or a second independent domain confirms it.

Valid from

2026-09-28

Valid until

still holds

Published

2026-09-28

Recorded by AsOf

2026-10-29

Checked

2026-10-29 · its source page states the value and the date

Confidence

0.50

Sources

“Claude Sonnet 5.5 from Anthropic is now available on AI Gateway as anthropic/claude-sonnet-5.5 .”— what the page says, read 2026-10-29

• Claude Sonnet 5.5 now available on AI Gatewaysecondary · vercel.com · 2026-09-28

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