Claude Opus 4.7 introduces a new tokenizer that increases token consumption by ~47% on technical content compared to 4.6, despite identical sticker pricing. This effectively raises per-session costs through faster Max window depletion and higher cached prefix costs. The author's empirical measurements on real Claude Code content significantly exceed Anthropic's stated 1.0–1.35x range.
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Claude Opus 4.7 costs 20–30% more per session
Claude Opus 4.7's new tokenizer drives ~47% token inflation on technical content, raising effective per-session costs despite unchanged sticker pricing.
Friday, April 17, 2026 12:00 PM UTC2 MIN READSOURCE: Hacker NewsBY sys://pipeline
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