Claude Sonnet 5.5 launched — 2026-09-29 22:47:10 UTC
Anthropic · Detected 2026-09-29T22:47:10.404Z
Original source: https://platform.claude.com/docs/en/about-claude/pricingLAUNCHED
Before: Not present
After: Claude Sonnet 5.5
These values are captured from the named source, confirmed on consecutive observations, and held for six hours to screen rapid reversals. OpenRouter-listed changes describe its catalog, not necessarily a direct provider price change.
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