Whilst we try to cover a range of topics and companies, rarely a week now goes by where OpenAI’s increasing financial muscle and ambition don’t make the news. This week is no exception seeing OpenAI’s third annual Dev Day take place in San Francisco. Banners proclaimed 4 million developers, 800 million weekly users, and 6 billion tokens delivered per minute via its API, and according to Sam Altman “it’s the best time in history to be a builder.”
While the GPT-5 Pro and Sora 2 APIs were announced, the focus was clearly on transforming ChatGPT into the definitive platform for the AI era. The strategy rests on two pillars:
- The Apps SDK aims to make ChatGPT a primary interface, using MCP (model context protocol) and a UI layer to integrate third party services like Figma and Spotify directly into conversations. This comes allied with the Agentic Commerce Protocol (ACP) enabling direct purchases within chat, starting with Etsy and Shopify. One must imagine that other protocols such as banking could be next.
- AgentKit and ChatKit provide a visual builder and human interface for creating agentic solutions, accelerating prototyping and once again heavily leveraging MCP. Codex is now generally available and looking to build on growing adoption of the “tool that builds the tools”.
The ambition is to create what CEO Sam Altman calls “one AI service” useful across a user’s whole life, backed by a massive infrastructure buildout.
However, despite OpenAI increasing maturity, their execution prioritises speed over elegance. The Apps implementation relies on some belt and braces web technology such as iframes and is by no means guaranteed to succeed where their previous chat extensions have comprehensively failed. Rapid expansion introduces substantial risks. Seamless integration for apps and commerce requires access to shared user context and this creates new security vulnerabilities for data exfiltration. OpenAI is asking for immense trust while the frameworks to secure that trust are still nascent.
The industry reaction was as ever wide ranging. While AgentKit offers a new and quick route to deploy AI solutions, many fear a vendor monoculture, and question the limiting paradigm of workflows. Some believe OpenAI is commoditising the very developers it empowers, with one founder remarking… “OpenAI dev day – you will never see pigs this happy at the slaughterhouse”.
Takeaways: Dev Day 2025 was a restating of an intent to own the entire AI value chain. OpenAI is aggressively positioning itself to control the interface, the workflows, and the transactions of the digital world. The services are compelling. At ExoBrain we must admit that there is no faster way to combine strong and highly cost-effective models, data, agents, fine-tuning and monitoring than the OpenAI developer platform. Will the new services start to become the default for the interface layer too? The convenience of a unified platform is compelling, but the risks of centralised control and security vulnerabilities are as yet unresolved.