Agentastic separates two ideas: providers (where models come from) and models (the specific brains you run). This page explains how they fit together; Configuring Providers covers the setup steps.
Providers
Agentastic has first-class support for three providers:
- Agentastic: the built-in cloud provider, included with your plan. No API key required, and it gives you access to a large catalog of frontier models from many vendors through one connection.
- Anthropic: connect directly with an API key or your Claude subscription to run Claude models.
- OpenAI: connect directly with an API key or your ChatGPT subscription to run GPT models.
You can enable any combination. The models a provider offers only appear once that provider is connected and enabled.
Models
A model is identified as provider:model, for example anthropic:claude-opus, openai:gpt-5, or agentastic:agent. In the launcher you select a model for a single request with the /model: tag:
/model:opus Summarize this contract and flag risky clauses
See Choosing Models for the full catalog and guidance on which to use when.
Per-role defaults
Rather than picking a model every time, Agentastic lets you set a default model for each role:
| Role | Used for |
|---|---|
| Chat | everyday conversation |
| Fast | quick, low-latency replies |
| Agent | autonomous tool-using tasks |
| Vision | images and screenshots |
| Computer | computer-use / desktop automation |
| Image | image generation (/imagine) |
| Dictation | formatting transcribed speech |
| Bundle | the set compared in Bundle mode |
Set these in Settings → Models and Providers. Agentastic picks the right default automatically based on what you're doing.
Built-in routing
The agentastic:agent model is Agentastic's canonical general-purpose route. It supports chat, agent workflows, vision, computer use, and dictation, so the app can use the same model across those roles while still selecting the right tools and request capabilities for the task.
Bundles (compare models)
A bundle runs your prompt against several top models at once so you can compare:
agentastic:frontier: top general-purpose modelsagentastic:imagine-frontier: top image-generation modelsagentastic:eastern-frontier: top models from Eastern labs
Trigger a comparison with Bundle mode (⌘2) or /model:frontier. See Launcher Modes.
Next
- Configuring Providers: connect credentials and test
- Choosing Models: the full model catalog