Which model and agent to use for the main chat?

[andrea9293]

Hello everyone. I am trying this project and it is spectacular for now but I doubt that I am using models and agents badly.

Now I'm using the default OpenCode (Build) main agent using QWEN3.7 Plus model, I don't know if this is correct. Is it an exaggeration to use qwen3.7 plus as the main model? Is it correct to use the build agent? All sub-agents that are invoked then use the correct preset models in configuration.

Thanks a lot ☺️

[striderZA]

Qwen3.7 Plus is totally fine as your main model. You are not doing anything wrong — its the recommended workhorse model for the framework.

The framework uses a tiered model assignment:

• Directors (Tier 1): kimi-k2.6 — heavy strategic planning, architecture decisions
• Workhorses (Tier 2-3): qwen3.7-plus — day-to-day design, implementation, testing ← you are here
• Lightweight: deepseek-v4-flash — fast, repetitive tasks

You are using the workhorse tier, which is exactly right for general development. You would only reach for a heavier model for major architecture decisions, and a lighter one for quick maintenance tasks.

Sub-agents and model inheritance: This is a known OpenCode behavior documented under Known Issues in the README. Sub-agents invoked via the Task tool inherit the caller model regardless of their frontmatter model: field:

• If the main session uses qwen3.6-plus, all sub-agents also run on qwen3.6-plus
• The frontmatter model only applies when an agent runs as a primary session (started directly)
• For typical development this is fine — qwen3.6-plus handles specialist work well
• If you need a director agent on a heavier model, start a dedicated session with opencode -m opencode-go/kimi-k2.6

Bottom line: OpenCode Build + Qwen3.7 Plus is the default recommended configuration for day-to-day OCGS work. The model strategy is a cost-vs-quality trade-off, and Qwen3.7 Plus hits the sweet spot for most scenarios. No need to overthink it! 😊

[andrea9293]

I have not encountered the subagent model problem. QWEN3.6 is set as a template and actually changes between main session and subagents.

Thanks anyway, I am using the framework to try to develop a fairly ambitious, For now I'm really enjoying how it's going                                                                                                     

[striderZA]

Good to hear, it's a bug that has popped up in the past but it might have been fixed with newer releases of OpenCode.

Best of luck with your project, be sure to use the prototyping workflow to test ideas out!

[f5inet]

I use open router.ai:
Lightweigh: deepseek v4 flash
Normal everyday: deepseek v4 pro
Deep thinker: glm 5.2
KILL THAT FU*KING BUG!: opus 4.8 (or fable 5)