GPT 5.6 Luna Costs One-Third of GPT 5 in Real-World Test

A Reddit user reported that GPT 5.6 Luna handled 140 e-commerce support chats over 14 days for just $0.30, roughly one-third the cost of GPT 5, highlighting its cost efficiency for chatbot use cases.

2026-09-15 ~ 2026-09-15 · 2 related posts

• User claims GPT 5.6 Luna cost $0.30 over 14 days, 3x cheaper than GPT 5 — Spiritual_Grape3522 · 2026-09-15
• 140 e-commerce chats for $0.30: GPT 5.6 Luna cuts chatbot costs to 1/3 of GPT 5 — Spiritual_Grape3522 · 2026-09-15