The idea in one line. Sol is the flagship, and it is priced like one. Making it produce all 50 of anything (emails, pages, posts) is like paying an architect to lay every brick. So you run a factory instead: Sol (the architect) writes ONE master spec and the quality bar, the cheaper models do the reps, and Sol comes back at the end as the inspector. You get Sol-level quality on the whole batch and pay Luna prices for the labor.
The Crew
Which model runs which station
GPT-5.6 ships as three tiers. The whole trick is using each for the job it is priced for: the senior thinks, the juniors do the reps.
| Model | Its station on the line | Price / 1M (in / out) |
|---|---|---|
| Sol | Architect + Inspector: writes the master spec + the quality bar, then QA-checks the batch | $5 / $30 |
| Terra | Drafter: turns the spec into structured drafts (use it when you want more than Luna quality) | $2.50 / $15 |
| Luna | Line worker: mass-produces + personalizes + formats all 50 units, fast and cheap | $1 / $6 |
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Unlocks: Sol writes the master spec · The line: Terra drafts, Luna mass-produces · The QA gate: Sol inspects the batch · Run the whole line
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