AI Desk · AI FingerprintingWithdrawn *
Why high: an exact fingerprint shared with 4 models that declare the same family, without a second signal of a different kind yet.
Anthropic: Claude 3 Haiku is Anthropic's model. Its measured tokenizer sits with the Claude group, which is evidence that it builds on the Claude tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against Anthropic's authorship of the model itself.
| We checked | What we found | Where it came from |
|---|---|---|
| How it counts tokens | Counts every one of the 50 test strings exactly like 4 other models | tk_2d06485c |
| How its API is set up | A combination of settings no other listing in the catalogue uses | api_b5cd1a4d |
| How much it can read and write | Reads up to 200,000 tokens at once, writes up to 4,096 | its own listing |
| Who served our requests | Amazon Bedrock | we measured it, 21 August 2026 |
Click a row to open the full comparison.
We sent Anthropic: Claude 3 Haiku fifty short pieces of text and recorded what each one cost it in tokens. The bars below are those costs. Two models built on the same tokenizer produce the same bars; a model built on a different one produces a different set, which is what makes this a fingerprint.
Overhead subtracted: 7 prompt tokens.
Claude 3 Haiku is Anthropic's fastest and most compact model for near-instant responsiveness. Quick and accurate targeted performance. See the launch announcement and benchmark results [here](https://www.anthropic.com/news/claude-3-haiku) #multimodal
* Anthropic: Claude 3 Haiku no longer appears in the OpenRouter catalogue, first absent from the snapshot of 5 October 2026. The record stays because the measurements above were real when they were taken and this address has been published.
