gpt-5.6-terra pricing
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. 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 2026-09-25 · general-purpose
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.
gpt-5.6-terra specifications
- Provider
- OpenAI
- API id
gpt-5.6-terra- Model type
- general-purpose
- Context window
- 1.1M tokens
- Max output
- 128K tokens
- Currency
- USD
- Price source
- First-party
- Last checked
- 2026-09-25
Tags
- flagship
gpt-5.6-terra across providers
The same model, priced by every seller we track. Ranked by the cost of 1M input + 1M output tokens, standard tier; savings measured against buying from the vendor directly.
| Provider | Input /1M | Cached /1M | Output /1M | 1M in + 1M out | vs vendor |
|---|---|---|---|---|---|
| $2.00 | $0.200 | $12.00 | $14.00 | — | |
OpenRouterHost | $2.00 | $0.200 | $12.00 | $14.00 | — |
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. omni-moderation-latest is free per 1M input tokens versus $2.00 for gpt-5.6-terra.
- 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.