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GPT-4o API Shutdown: Migrate Your App Before 14 January 2027

OpenAI retires GPT-4o and GPT-4.1 from its API on 14 January 2027. See who is affected, what changes with GPT-6 Luna and a six-step migration plan.
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How Much Does It Cost to Build an AI Agent in 2026?

What it really costs to build an AI agent in 2026: build phases, LLM token prices from OpenAI and Anthropic, and how to budget without surprises.