GPT-5.6 Terra
The everyday tier — 40% of Sol's price, same window and cutoff.
- Maker
- OpenAI
- Context
- 1.05M tokens
- Pricing
- $2 / 1M tokens / $12 / 1M tokens
Cut from $2.50 / $15 on 30 Jul 2026. Long-context requests are re-rated to $4 / $18. Knowledge cutoff Feb 2026.
Best for
- Everyday drafting, rewriting, brainstorming
- Quick answers where latency matters
- The first tier to try before escalating to Sol
Prompting quirks
Use the system / custom-instructions slot
Persistent context (your role, your product, your tone) belongs in custom instructions, not re-pasted every prompt. Saves tokens and keeps outputs consistent.
Front-load the constraint
Put the format and length limit in the first sentence. It's eager to be helpful and will over-produce if you let it.
Escalate on evidence, not on nerves
Terra and Sol share the context window, the cutoff and the effort control. Run it on Terra first; move up only when the output actually falls short, not because the task feels important.
Copy-paste example
Tuned for GPT-5.6 Terra. Swap in your own content where marked.
Write a release note for this change. Audience: existing customers.
Tone: clear, no hype. Max 80 words. Lead with the user benefit.
Change: {describe the change}Facts verified against the official OpenAI docs on 19 August 2026.