OpenAI API
The GPT model family with vision, audio, and the broadest tool-calling ecosystem
OpenAI's API provides access to GPT-4o, o1, o3, and GPT-4o-mini — models that support text, vision, audio, and structured outputs. The platform includes the Assistants API for stateful agent runs, a built-in file storage layer, and native function calling that underpins most orchestration frameworks.
Agents that need multimodal inputs (images, audio), structured JSON output via constrained generation, or tight integration with the OpenAI ecosystem (Assistants API, batch processing).
Builders across all skill levels. Strong default choice due to framework support. Costs are usage-based; GPT-4o-mini is economical for high-throughput agents.
Agent Architecture Fit
OpenAI models serve as the reasoning engine in your blueprint. The Assistants API offers a managed agent run loop with thread-based memory and built-in file retrieval, reducing the orchestration layer you need to build yourself. GPT-4o's vision capability enables blueprints that process screenshots, documents, or image inputs as part of their decision flow.
when you need extended context (200K tokens), superior instruction-following, or safer outputs in sensitive domains
when token-per-second throughput matters more than frontier capability
Next step
Your agent starts with a blueprint.
A blueprint tells you which tools to use, where they fit, and how they connect — before you write a line of code.
Build yours free →