Claude: ‘Introducing Claude Haiku 5.5’, about 75% cheaper to run than Haiku 4.5
Claude @claudeaiXImportance: major (4 of 5)
Why it matters
Official launch post for Claude Haiku 5.5; about 6.24M views on Oct 9 (fxtwitter), far more than any other post on the launch.
Summary
Anthropic’s product account announces Claude Haiku 5.5 (18:01 UTC, Oct 7): “Introducing Claude Haiku 5.5: the cheapest, fastest, and most capable small model we’ve ever released. On average, it costs around 75% less to run than Claude Haiku 4.5.” Read via api.fxtwitter.com on 2026-10-09: about 6.24M views and 44.7k likes.
Archived text
Introducing Claude Haiku 5.5: the cheapest, fastest, and most capable small model we’ve ever released.
On average, it costs around 75% less to run than Claude Haiku 4.5.