Anthropic Claude Opus 4.7 uses 33% more tokens than Opus 4.6

Fri, 17 Apr 2026 00:00:00 +0000

Even though the cost of Claude Opus 4.6 & Claude Opus 4.7 is same ($5/M input tokens and $25/M output tokens).

However, Claude Opus 4.7 uses different tokenizer which might use up to 33% more token usage for the same input if you compare it with Opus 4.6 or other models.

They’ve explictly called that out in their website.

Opus 4.7 uses a new tokenizer compared to previous models, contributing to its improved performance on a wide range of tasks. This new tokenizer may use up to 35% more tokens for the same fixed text.

Claude-Opus-4-7 on AI Engineer Guide

Anthropic Claude Opus 4.7 uses 33% more tokens than Opus 4.6