The article measures the cost of Anthropic's new tokenizer in Claude 4.7, finding it uses 1.47x more tokens than the previous version, which can lead to increased costs for users. The author also tests whether the new tokenizer improves instruction following, finding a small but real improvement. The increased token usage can lead to higher costs, especially for users who hit rate limits. The article concludes that the increased cost may be worth it for some users, depending on their specific use case.