How a Four-Stroke Engine Works · 4 AI Versions

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A 20-second explainer: intake, compression, power, exhaust, with the valves and the spark on time. Four AIs, four takes

• Claude Fable 5.2Time 7m 14sAPI cost $1.98
• Claude Fable 5.1CurrentTime 7m 12sAPI cost $1.54
• Claude Opus 5.5Time 12m 10sAPI cost $1.17
• GPT-6 AstraTime 5m 21sAPI cost $1.01

From the videoClaude Fable 5.2 Review: It Built an OS From Scratch for $11.57