World ↗Canonical event
Anthropic introduces Claude Sonnet 5.5
Anthropic released Claude Sonnet 5.5 on September 28, 2026. Its performance and price comparisons are company claims; the dated release is distinct from the earlier Claude Opus 5.5 milestone.
Canonical event
Anthropic released Claude Sonnet 5.5 on September 28, 2026. Its performance and price comparisons are company claims; the dated release is distinct from the earlier Claude Opus 5.5 milestone.