Token Cost Calculator for Opus 4.6 and Opus 4.7

Because of Opus 4.7's new tokenizer, the same input can be counted as more tokens, so you can instantly calculate the difference in request tokens and cost between 4.6 vs 4.7.

If you paste in a conversation, system prompt, or plain text, you can check the difference in token count between the two versions and the cost difference based on current pricing, and it also aggregates anonymous community-submitted data to show real-world usage differences.

Based on 425 aggregated submissions, Opus 4.7 showed a +37.4% increase over Opus 4.6 in both average request tokens and average request cost.

The magnitude of increase ranged from +19.0% ~ +86.2% based on the most recent 50 cases, with cases in the +30% range and +40% range widely spread out.

There are two changes behind this.

• Due to the updated tokenizer, the same input maps to 1.0~1.35x tokens depending on content type
• Higher effort levels, especially in later turns of agentic environments, cause more thinking and thus increased output tokens

This tool is open source, made by Bill Chambers, and is not an official Anthropic product. Input text is not stored; it is parsed in the browser and then passed to a token counting API, with only anonymous token count metrics left in the DB.

Ultimately, this page is a cost comparison tool that shows with actual numbers that 4.7 can be more expensive than 4.6 even for the same prompt.