alt Hacker NewsThere's also a tokenizer efficiency difference: modern Claude's 100K tokens are about ~60-65K modern GPT tokens, so in reality the Luna cutoff is much further away than the Haiku one.
You can test with Anthropic's count_tokens endpoint or with https://crates.io/crates/tokwc
> ...this tokenizer, the same input text produces approximately 30% more tokens on Claude Haiku 5.5 than on Claude Haiku 4.5.
So, it is might be even worse.