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GPT-5.6 Terra: price, performance and context
Proprietary GPT-5.6 Terra by OpenAI costs $2.00 per 1M input and $12.00 per 1M output tokens, handles up to 1.1M tokens in one request (≈ 3,200 pages of text) and scores 42.1 points on the AgentKernel performance index, rank 18 of 212.
Privacy: zero data retention with one provider, including in the EU. Availability over the last 24 h: 100%.
Updated Oct 09, 2026, 16:46 UTC · openai/gpt-5.6-terra
Open in the interactive comparison
Key facts
- Licence
- Proprietary: no public weights, only through a provider API
- Input / 1M tokens
- $2.00
- Output / 1M tokens
- $12.00
- Context window
- 1.1M tokens
- Max. output
- 128K tokens
- Performance index
- 42.1 points · rank 18 of 212
- Coding index
- 76.7 points · rank 6 of 119
- Agentic index
- 43.2 points · rank 17 of 91
- Cost at your usage
- $5.00 / month
- Knowledge cutoff
- Feb 2026
- In the catalog since
- Jul 09, 2026
- Capabilities
- Reasoning, Vision, Tool Calling, Files
Placements by task
What do you get for $10.00?
Rules of thumb from the cost calculator, base rates without caching or taxes.
| Task | Cost per task | For $10.00 |
|---|
| Chat repliesA question with a short history, a detailed answer | $0.007 | 1,500 |
| Email draftsBullet points in, a finished email out | $0.005 | 1,900 |
| Document summariesRead 10 pages, write a one-page summary | $0.013 | 790 |
| Code reviewsReview and comment on 500 lines of code | $0.023 | 430 |
| Book analysesAnalyse a 300-page book in one go | $0.224 | 44 |
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