gpt-5.6-terra pricing
gpt-5.6-terra from OpenAI costs $2.00 per 1M input tokens and $12.00 per 1M output tokens. Cached input is $0.200 per 1M. Context window 1,050,000 tokens.
API id gpt-5.6-terra · OpenAI · source · updated 2026-08-11
$2.00
Input / 1M tokens
$12.00
Output / 1M tokens
$0.200
Cached input / 1M
1.1M
Context window
Long-context pricing
Prompts over 128K tokens are billed at $4.00 per 1M input and $18.00 per 1M output — roughly 2.0× the standard input rate. Budget for this if you send large documents.
What gpt-5.6-terra costs in practice
| Workload | Input tokens | Output tokens | Estimated cost |
|---|---|---|---|
| Short chat turn | 1,000 | 500 | $0.0080 |
| Document summary | 50,000 | 2,000 | $0.12 |
| 1M tokens in, 200K out | 1,000,000 | 200,000 | $4.40 |
Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.
Common questions
- How much does gpt-5.6-terra cost per 1M tokens?
- gpt-5.6-terra costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on the standard tier. Cached input is $0.200 per 1M.
- What is gpt-5.6-terra's context window?
- gpt-5.6-terra accepts up to 1,050,000 tokens in a single request, and can return up to 128,000 output tokens.
- Is there a cheaper OpenAI model than gpt-5.6-terra?
- Yes. gpt-4o-mini-2024-07-18 is $0.300 per 1M input tokens versus $2.00 for gpt-5.6-terra, with a 128,000 token context window.
- Where does this gpt-5.6-terra price come from?
- Directly from OpenAI's published pricing page, re-read every day and normalized to USD per 1,000,000 tokens.