- models
- api
Claude Haiku 5.5
Anthropic's Claude Haiku 5.5 is on the gateway as haiku-5.5 (canonical id claude-haiku-5-5), at our provider's published rate: $0.10 / $0.50 per 1M tokens, $0.125 cache writes and $0.01 cached input — ten times cheaper than Claude Haiku 4.5 on every class. It is a 1M-context model with tool calling, prompt caching and adaptive thinking on by default, with effort levels from low to max.
It works in Claude Code natively (ANTHROPIC_MODEL=haiku-5.5, or pick claude-haiku-5-5 from the /model list), in Cursor as a custom model named haiku-5.5 through the same lane that carries the other Claude models, and in the hosted chat. The bare haiku alias still means Claude Haiku 4.5. Priced far below the premium threshold, so on subscription plans it draws from the standard windows.