Major customers of frontier AI labs, such as voice AI company Eleven Labs, are actively working on proprietary models. This trend of verticalized model development signals a desire to escape data leakage concerns and dependence on potential future competitors.

Specialized SaaS companies like Writer and Intercom are moving beyond simply wrapping OpenAI or Anthropic APIs. They are now training their own foundation models to create more defensible, vertically-integrated AI products, signaling a shift away from platform dependency toward bespoke AI stacks.

Frontier models from giants like OpenAI force enterprises to share sensitive data, creating platform risk. The future of corporate AI lies in private, fine-tuned, open-source models that keep a company's "intelligence" in-house, preventing it from training potential competitors.

Companies in pharma, finance, and other sectors are realizing that feeding their proprietary data to closed AI models creates a strategic risk. They fear the AI labs could become direct competitors, driving a shift towards sovereign, open-source models run on their own data.

Innovative AI startups are moving beyond proprietary APIs to build defensible businesses. They use open-source models to gain the deep control needed for custom fine-tuning, post-training, and unique deployment methods—capabilities that closed-source vendors do not offer and are essential for differentiation.

Startups are becoming wary of building on OpenAI's platform due to the significant risk of OpenAI launching competing applications (e.g., Sora for video), rendering their products obsolete. This "platform risk" is pushing developers toward neutral providers like Anthropic or open-source models to protect their businesses.

The choice between open and closed-source AI is not just technical but strategic. For startups, feeding proprietary data to a closed-source provider like OpenAI, which competes across many verticals, creates long-term risk. Open-source models offer "strategic autonomy" and prevent dependency on a potential future rival.

The common critique of AI application companies as "GPT wrappers" with no moat is proving false. The best startups are evolving beyond using a single third-party model. They are using dozens of models and, crucially, are backward-integrating to build their own custom AI models optimized for their specific domain.

Companies are becoming wary of feeding their unique data and customer queries into third-party LLMs like ChatGPT. The fear is that this trains a potential future competitor. The trend will shift towards running private, open-source models on their own cloud instances to maintain a competitive moat and ensure data privacy.