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Source: [Hacker News](https://cailinpitt.com/blog/2026/9/1/chicago-transit-authority-wrapped)
Using GPT-5. 6, Ringg powers multilingual agents across voice, chat, WhatsApp, and web for 90% less cost vs. GPT-4.
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Extract one mutator only after tests pin object identity. Value equality alone hides alias bugs in shared containers. A copied list can match every item and still break a later caller.