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Sources: Periodic Labs, which is building AI for material science, is raising $200M led by a16z, valuing the company at $1B before the investment (Kate Clark/Bloomberg)

Kate Clark / Bloomberg : Sources: Periodic Labs, which is building AI for material science, is raising $200M led by a16z, valuing the com...

8 August 2025

With GPT-5's launch, OpenAI has removed its older models like GPT-4o and o3 from the ChatGPT model selector, sparking a backlash from some users (Michael Kan/PCMag)

Michael Kan / PCMag:
With GPT-5's launch, OpenAI has removed its older models like GPT-4o and o3 from the ChatGPT model selector, sparking a backlash from some users  —  ‘They have completely ruined ChatGPT,’ one user complains.  Some are even canceling their paid subscriptions to ChatGPT, claiming GPT-5 is inferior to the company's previous models.

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