GPT-5.6 Sol, Terra and Luna: which model is good at what?
Sol is for deep difficult work, Terra for balanced daily production, and Luna for speed and volume. Where can you use each one, and when should you choose it?
Which AI model fits which task?
I compare AI models and coding agents through real use cases, then explain which tool, model and setting makes sense for each task.
Featured guide
Read the guide →A practical guide to model choice.
Compare Sol, Terra and Luna by task type, then choose the model that fits your work.
Articles
All articles →Guides that make choices clearer.
Practical guides to model selection, coding agents, reasoning settings and output verification.
Coding-agent permission modes: plan, auto-edit, or full access?
Plan, read-only, auto-edit, and full access are not for the same job. Choose Codex, Claude Code, and Gemini CLI permissions by task side effects.
Low vs high reasoning: which setting fits each coding-agent task?
Low, medium, high, xhigh, and max should not be used for the same work. Route coding tasks by risk, ambiguity, and verification cost.
Codex CLI vs Claude Code vs Gemini CLI: which coding agent fits which task?
A task-led comparison of three terminal agents, separating vendor claims from tested results and focusing on repository edits, reasoning, permissions and solo-builder verification.