Keep your conversations in context
Bring experiences with conversation history to deliver relevant responses.
The efficient language model platform for developers
Bring more capability to every screen
Give your apps more to say
Build and experiment with LLMs, and bring AI into the products your team already builds.
Get up and running in minutes
No credit card required. Make your first API request with just a few lines of code.
Build with no worry ahead, forever
No credit top-ups. Start building with straightforward usage limits and spend your time writing code.
Monitor your agents in real time
Track requests, latency, and errors as they happen, all from one place.
Bring your team with you
One team, unlimited people. Invite the whole team to your organization and collaborate in one place.
Hook into anything
Pair our OpenAI-compatible API with any SDK that supports it. Truly plug-and-play.
Truly plug-and-play
Connect tools and build context to customize your agents for any purpose.
Frequently asked questions
Halesis is a developer platform that provides efficient large language model (LLM) APIs and infrastructure tools for building, experimenting with, and monitoring AI agents.