Which Hermes Agent model to use for which task: SOL, TERRA, LUNA
offers three models — SOL, TERRA, and LUNA — and picking the right one for each task balances cost and quality. SOL is meant for complex , design, and research, with its XHigh or Ultra tiers reserved for the hardest tasks. For , everyday coding, or business documents where quality matters most, SOL Medium is the pick, while TERRA is the budget-conscious option, delivering about 85% of SOL's quality at roughly half the cost.
For high-volume, batch, , or work where results are easy to verify, LUNA is the fastest and cheapest choice. When working inside like Codex or Copilot, the recommendation is to use LUNA or TERRA for the initial exploration pass and switch to SOL for the final solve or debugging stage.
Key points
- Use SOL for complex , , and research; use its XHigh/Ultra tiers for the hardest tasks
- For production or everyday coding needing top quality, use SOL Medium; for budget concerns, use TERRA
- TERRA delivers about 85% of SOL's quality at roughly 50% of the cost
- LUNA is the fastest, cheapest option for high-volume, batch, , or tasks
- For like Codex or Copilot, use LUNA/TERRA for exploration and SOL for final solving or debugging