Models & providers

agntz calls model providers directly with your API key — there's no proxy and no data routing through our servers. You configure a provider by exporting its API key as an environment variable (embedded mode) or saving it in Settings → Connections (hosted / self-hosted).

Supported providers

Picking a model in a manifest

model:
  provider: anthropic
  name: claude-sonnet-4-6
  temperature: 0

provider is the id from the table above; name is the exact model id the provider expects (e.g. gpt-5.4-mini, claude-sonnet-4-6, gemini-3-pro).

OpenRouter — one key, hundreds of models

OpenRouter is a meta-provider that proxies to virtually every commercial and open-source model behind a single API key. Use it when you want to:

• Access open-source models (Llama, Mistral, DeepSeek, Qwen, …) without standing up your own inference.
• Try many models without juggling per-provider API keys.
• Take advantage of OpenRouter's routing, fallbacks, and unified billing.

Set the key and reference any OpenRouter model by its slug (<author>/<model>):

export OPENROUTER_API_KEY=sk-or-...

model:
  provider: openrouter
  name: anthropic/claude-sonnet-4

model:
  provider: openrouter
  name: meta-llama/llama-3.3-70b-instruct

model:
  provider: openrouter
  name: deepseek/deepseek-chat

Free-tier models are available via the :free suffix (subject to OpenRouter's rate limits):

model:
  provider: openrouter
  name: meta-llama/llama-3.3-70b-instruct:free

OpenRouter reports the per-request USD cost on every response, so traces in the UI show actual spend instead of an estimate.

Attribution

By default, requests through OpenRouter are attributed to your app with the headers HTTP-Referer: https://agntz.co and X-Title: agntz (used by OpenRouter's public rankings). Override via the provider's stored config:

{ "referer": "https://your-app.com", "title": "Your App" }

Other providers, custom endpoints

Every provider supports a baseUrl override in its stored config — useful for proxies and OpenAI-compatible gateways. For arbitrary providers not in the table above, supply a custom modelProvider implementation to createRunner.