Fable 5 vs GPT-5.6 Sol: I spent $2,000 and 2 billion tokens to find out who wins — Expo blog
This title could be clearer and more informative.Try out Clickbait Shieldfor free (5 uses left this month).
A developer spent $2,000 and over 2 billion tokens to benchmark three AI coding models — Fable 5 (Claude Code), GPT-5.6 Sol, and GPT-5.5 — by having each one-shot three Expo/React Native apps: an AI calorie tracker, a ChatGPT clone, and a SwiftUI-to-Expo rewrite. Fable 5 won on code quality (scoring 85–88 vs 76–86), speed, and conciseness across all three apps, though it was the most expensive per hour ($74–$163/h). GPT-5.6 Sol proved to be a persistent problem-solver suited for automation tasks, while GPT-5.5 consistently produced the most technical debt. The experiment used spec-driven development, autonomous iOS simulator validation via Argent MCP, and Expo API routes for the backend. The verdict: use Fable 5 for larger, quality-sensitive projects and GPT-5.6 for well-defined automation tasks.
