Claude

Haiku 5.5 Is 10x Cheaper Until Its Tokenizer Catches Up

Claude Haiku 5.5 launched on 7 October at $0.10/$0.50 per million tokens, a tenth of Haiku 4.5, but past 100,000 prompt tokens every rate is five times higher and applies to the whole request, cached tokens included. The newer tokenizer counts about 30% more tokens, so a 77,000-token Haiku 4.5 prompt lands over the line unchanged. It is the only Claude model priced by length; OpenAI's line is at 272K at 2x, Gemini 3.8 Flash has none. Gateways mispriced it, Haiku 4.5's retirement floor ends 15 October, and temperature, prefill and budget_tokens now return 400.