OpenAI GPT-5 Launch: Unified Reasoning, Agent Tools and Lower-Cost API Options
This story is from 2026-09-29. It is preserved in the archive; the latest stories are on the live feed.
OpenAI launched GPT-5 on August 7, 2025, turning a 10 a.m. PT livestream teaser into a broad release across ChatGPT, the API and developer materials. The model family is OpenAI's new unified system for coding, reasoning and agentic tasks, designed to choose between faster responses and deeper think…
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- 2026-09-29 16:15 · DEV Community — AI
OpenAI GPT-5 Launch: Unified Reasoning, Agent Tools and Lower-Cost API Options