OpenAI

Enterprise AI Development with the OpenAI API

OpenAI is the AI research and product company offering the world's most widely used large language model (LLM) API. GPT-4o, o1, and o3-mini models deliver industry-standard performance in text comprehension, generation, code writing, and multimodal content processing. Developers access these models via a REST API and are billed by monthly token consumption.

The main reasons we choose OpenAI for AI projects at Detartech: the widest model selection and access to the latest models; high semantic accuracy in RAG applications thanks to powerful embedding models (text-embedding-3-large); comprehensive documentation and Python/Node.js SDK support; deterministic JSON output generation with Function Calling and Structured Output features.

OpenAI Features We Use

With the Chat Completions API, we build both conversational interfaces and one-shot task completion workflows. With the Embeddings API, we convert text to vector space to create semantic search infrastructure in RAG systems. The Function Calling / Tool Use feature allows the LLM to access external APIs or databases in a controlled manner, forming the foundation of agent architectures. With Structured Outputs, we constrain LLM responses to a specific JSON schema, enabling safe feeding into downstream systems.

For cost optimisation, we select models based on project requirements: we prefer gpt-4o-mini for simple classification tasks and o1 for tasks requiring deep reasoning.