Effective AI Consumer Price-per-Task: An Exploratory Computation (Claude Pro, ChatGPT Plus, ChatGPT Pro), Jan vs Jun 2026

An exploratory computation of effective AI consumer price per task across three major subscription plans (Claude Pro, ChatGPT Plus, ChatGPT Pro), comparing Jan 2026 vs Jun 2026. This is a small sample (n=3 plans, one of which has no January value), not a comprehensive index. Effective $/task is computed from a fixed task basket priced at each plan's list price, then adjusted for tokenizer inflation and free-tier changes; it is a computed comparison metric, NOT a measured bill. The comparison illustrates list-price-flat 'shrinkflation' driven by the Opus 4.7 tokenizer (carried into Opus 4.8). Methodology and full sourcing at https://nesyona.com/research/real-ai-price-shrinkflation-index-2026/ . License CC-BY 4.0.