Providers

Amodal supports multiple LLM providers with a unified interface. Switch providers by changing an environment variable — no code changes needed.

Supported Providers

Provider	Models	Auth
Anthropic	Claude Opus, Sonnet, Haiku	`ANTHROPIC_API_KEY`
OpenAI	GPT-4o, GPT-4, GPT-3.5	`OPENAI_API_KEY`
Google	Gemini Pro, Flash	`GOOGLE_API_KEY`
AWS Bedrock	Claude, Titan, Llama	AWS credentials
Azure OpenAI	GPT-4o, GPT-4	`AZURE_OPENAI_API_KEY` + endpoint

Configuration

Auto-detection

Set the relevant environment variable and Amodal auto-detects the provider:

export ANTHROPIC_API_KEY=sk-ant-...
amodal dev   # uses Anthropic automatically

Explicit config

Specify in amodal.json:

{
  "provider": "anthropic",
  "model": "claude-sonnet-4-20250514"
}

Failover

The FailoverProvider cascades between providers with retry logic and linear backoff:

{
  "provider": "failover",
  "providers": ["anthropic", "openai"],
  "retries": 2,
  "backoffMs": 1000
}

If the primary provider fails, the runtime automatically tries the next one.

Streaming

All providers support SSE streaming via chatStream(). The streaming interface is unified — your client code works identically regardless of which provider is active.

Multi-Model Comparison

Use amodal eval or amodal experiment to compare providers:

amodal eval --providers anthropic,openai,google

This runs the same eval suite against each provider and reports quality, latency, and cost differences.