GPT-5.6 Terra vs GPT-5.6 Terra Pro
GPT-5.6 Terra at $1.15 in and $6.90 out and GPT-5.6 Terra Pro at $1.15 in and $6.90 out — per million tokens, from the same wallet.
GPT-5.6 Terra
OpenAI
1.1¢
for a client proposal
$1.15 in · $6.90 out / 1M
1.05M context · released 2 months ago
GPT-5.6 Terra Pro
OpenAI
1.1¢
for a client proposal
$1.15 in · $6.90 out / 1M
1.05M context · released 2 months ago
Asking all both at once — identical prompt, identical context — costs about 2.3¢ for a typical client proposal.
At a glance
- All 2 cost the same on input.
- Identical context windows: 1.05M tokens each.
Cost per task
Estimated totals at the rates above. Solid bar is input, lighter bar is output.
Quick code fix
2K in · 500 outDraft a client proposal from notes
5K in · 800 outContext-heavy session (Alyph workspace)
155K in · 4K outAnalyze a 50-page legal contract
35K in · 1K outLarge architecture refactor
250K in · 3K outSolid part of each bar is input tokens, the lighter part is output. Models that don’t fit a task are marked instead of priced.
Cost vs Token Amount
Drag the slider to adjust the split between input and output workload.
Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.
Pricing
Specs
Try it with real numbers
2K tokens in · 500 tokens out.
All 2, same prompt and context: 1.1¢. That is the entire cost of the comparison.
Your $5 welcome credit covers about 434 of these.
Which should you pick?
On price they are identical: about 1.1¢ for a typical task each.
Or don’t pick. Send the identical prompt to all both, read the answers side by side, and keep the winner. How to run a fair bake-off →
Questions, answered
Which is cheaper, GPT-5.6 Terra or GPT-5.6 Terra Pro?
Which has the largest context window?
Can I run GPT-5.6 Terra and GPT-5.6 Terra Pro side by side on Alyph?
Ask both at once
Identical prompt, identical context, answers side by side — about 2.3¢ for a typical client proposal. Free to start, with $5 of credit.