Here are Fable's pelicans for the different thinking effort levels, plus how much each one cost to generate via the Claude API

Simon Willison demonstrated Fable's pelican illustrations generated at different Claude API thinking effort levels, showcasing how increased computational investment affects output quality and cost. The post compares the visual results and associated API expenses for generating pelicans across Claude's various thinking effort tiers.

Source: Simon Willison (X) | 2026-06-10