Architecture: Which AI models should we use for planning agents vs executi...

Documentation for Sessions

🏗️ Architecture: Which AI models should we use for planning agents vs executi...

Date: 2026-02-03
Time: 03:21:18 UTC
Session: editor2-76.84
Agent: backend
Confidence: 90%
Status: ✅ Documented

📋 Decision Context

Question:

Which AI models should we use for planning agents vs execution agents?

Task: Session 82.0 - Infrastructure Setup: AI model configuration

🎯 Decision Made

Chosen:

Use Opus 4.5 for planning agents, Sonnet 4.5 for execution agents

Options Considered:

Use Claude Sonnet 4.5 for all agents
Use Claude Opus 4.5 for all agents
Use Opus 4.5 for planning agents, Sonnet 4.5 for execution agents

💭 Reasoning

Opus 4.5 excels at complex reasoning, task decomposition, and multi-step planning needed for AgentOrchestratorService and SpaceAgentOrchestratorService. Sonnet 4.5 is faster and more cost-effective for straightforward execution tasks like VITTO and Space Agents. This provides optimal balance between quality and performance.

📁 Files Involved

apis/backend-ai-api/src/app/orchestrator/agent-orchestrator.service.ts
apis/backend-ai-api/src/app/vitto/vitto-orchestrator.service.ts

🔗 Related

Decision ID: dev_1770088878877_9ozjv39
Session: 76
Workspace: editor2

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