No, OpenAI is not dead o3 is 3 months old, they were the first company to implement tool use in the CoT, of course xAI made a "slightly" better model 3 months later copying the exact same technique Grok-4 Heavy is just o3-pro People don't get that companies catch up because OpenAI actually shows us what they did to achieve better models. They could've just said o3 just took longer to think and no one would've known it had tool use in the CoT, or even don't say reasoners existed at all