Model Registry

Agent Orchestrator supports multiple AI models across three pricing tiers. Assign the right model to each agent based on task complexity.

Available Models

Logical Name Model Tier Best For
haiku Claude Haiku 4.5 Standard Quick tasks, classification, extraction, formatting
nova-lite Nova Lite Standard Cost-effective processing, summarization
nova-pro Nova Pro Standard General-purpose, balanced performance
sonnet Claude Sonnet 4.5 Advanced Research, analysis, writing, tool use — best all-rounder
nova-premier Nova Premier Advanced Complex reasoning, long-context analysis
opus Claude Opus 4.6 Premium Most capable — complex reasoning, strategy, nuanced writing

Pricing Tiers

Token costs vary by tier. You're charged per token processed (input + output combined):

Standard

$1 / 1M tokens

Haiku, Nova Lite, Nova Pro

Advanced

$10 / 1M tokens

Sonnet, Nova Premier

Premium

$50 / 1M tokens

Opus

Plus $0.01 per workflow execution.

Using Models in Workflows

Assign models to agents with the Model: line. If omitted, agents default to Sonnet. 

### Fast Classifier
Categorizes input documents by type.
Model: Haiku

### Deep Analyst
Performs thorough analysis requiring strong reasoning.
Model: Opus

Choosing the Right Model

Use Standard (Haiku/Nova) when:

  • Tasks are straightforward (formatting, extraction, classification)
  • Speed matters more than depth
  • You're processing many items in parallel (fan-out loops)
  • Budget is a primary concern

Use Advanced (Sonnet) when:

  • Tasks need research, analysis, or creative writing
  • The agent uses tools (web search, knowledge base, APIs)
  • Quality and nuance matter — this is the best general-purpose choice

Use Premium (Opus) when:

  • Tasks require deep reasoning, strategy, or complex multi-step logic
  • Output quality is critical (executive reports, legal documents)
  • You need the most capable model available for critical steps

Model Version Pinning

By default, logical names (like sonnet) resolve to the latest version. To pin a specific version, use YAML frontmatter: 

---
models:
  sonnet: claude-sonnet-4-5
  opus: claude-opus-4-6
---

# My Workflow
...

Resolution order: workflow frontmatter > tenant config > platform defaults.