AsOf

product

Claude Sonnet 5.5

Second Claude 5.5 model, faster lower-cost complement to Opus 5.5. 2 claims on record, 2 currently valid, 0 superseded, plus 1 post. Last change 2026-09-28.

See the record on another date

State as of 2026-11-04

2 asserted claims
factvalue
predecessorClaude Sonnet 5
2026-09-28 · conf 0.95primary, 1 source for predecessor
price$2 per million input tokens
2026-09-28 · conf 0.95primary, 1 source for price

Latest

1 dated event · full timeline →
2026-09-28 · model release
Claude Sonnet 5.51 src
valid

State changes since 2026-05-08

2 changes · superseded claims stay visible
2026-09-28 · price
$2 per million input tokens

clm_513F0F179518 · Anthropic (news)

valid
2026-09-28 · predecessor
Claude Sonnet 5

clm_BEF063B946C7 · Anthropic (news)

valid