Apex: Agentic coding for mobile and web, fluent in React (apex.callstack.com)

Apex, a new AI model developed by Frontier Labs, is designed specifically for agentic coding in React Native and Next.js, promising frontier-level quality at a significantly reduced cost. With its ability to generate code quickly and efficiently—up to 250 tokens per second and 3 times faster than the leading GPT 6.1 Sol—Apex enables developers to tackle everyday tasks like building mobile and web applications without excessive resource expenditure. By offering a cost per task that is 13 times cheaper than competitors and leveraging a 256K context window for deeper repository integration, Apex positions itself as a compelling option for development teams seeking performance and affordability. The introduction of Apex is significant for the AI/ML community as it reflects a shift towards models that are not only powerful but also tailored for specific frameworks, addressing the demand for efficient solutions in software development. Its training is grounded in up-to-date documentation and real-source code, ensuring that developers have access to current, high-quality knowledge. Additionally, Apex emphasizes data security with options for EU hosting and zero data retention, making it suitable for enterprises with stringent compliance needs. Overall, Apex's unique capabilities and operational model mark a noteworthy advancement in AI-assisted software development tools.