Summary
This dataset compiles OpenAI's official pricing and benchmark figures for GPT-6.1 Terra, released on October 26, 2026: standard API pricing of $1 per million input tokens, $0.05 per million cached input tokens, and $5 per million output tokens, a 50% cut versus GPT-5.6 Terra and GPT-6.1 Sol; OpenAI reports a 15% higher score than GPT-5.6 Terra at medium reasoning effort on Agents' Last Exam at about one-third the per-task cost.
Data Notes
- Source: OpenAI official news and product documentation (released October 26, 2026).
- Scope: Prices are OpenAI standard API pricing in USD per million tokens; benchmark figures are as disclosed by OpenAI and have not been independently retested.
- Note: GPT-6.1 Terra is available to Plus, Pro, Enterprise, and Edu users in ChatGPT Work and Codex; the API model name is gpt-6.1-terra.
Core Data Table
| model | metric | value | note |
|---|---|---|---|
| GPT-6.1 Terra | input price | $1/M tokens | standard API pricing |
| GPT-6.1 Terra | cached input price | $0.05/M tokens | standard API pricing |
| GPT-6.1 Terra | output price | $5/M tokens | standard API pricing |
| GPT-5.6 Terra | input price | $2/M tokens | comparison baseline |
| GPT-6.1 Sol | output price | $10/M tokens | comparison baseline |
Benchmark Performance Table
| model | benchmark | metric | value |
|---|---|---|---|
| GPT-6.1 Terra | Agents' Last Exam (medium reasoning) | score vs GPT-5.6 Terra | +15% |
| GPT-6.1 Terra | Agents' Last Exam (medium reasoning) | task cost vs GPT-5.6 Terra | ~1/3 |
| GPT-6.1 Terra | Agents' Last Exam (medium reasoning) | score vs GPT-6 Astra | on par |
| GPT-6.1 Terra | Agents' Last Exam (medium reasoning) | token price vs GPT-6 Astra | ~1/10 |
| GPT-6.1 Terra | highest reasoning effort | token efficiency vs Claude Opus 5.5 | over 3x |
| GPT-6.1 Terra | highest reasoning effort | token price vs Claude Opus 5.5 | ~1/4 |
| GPT-6.1 Terra | highest reasoning effort | task cost vs Claude Opus 5.5 | ~9x lower |
| GPT-6.1 Terra | task completion speed | vs GPT-6 Astra / GPT-6.1 Sol | over 3x faster |
Pricing Comparison
| model | standard input (USD/M) | standard output (USD/M) | change |
|---|---|---|---|
| GPT-6.1 Terra | 1 | 5 | baseline (new) |
| GPT-5.6 Terra | 2 | 10 | 2x Terra |
| GPT-6.1 Sol | 2 | 10 | 2x Terra |
| GPT-6 Astra | ~10 | ~50 | ~10x Terra |
Field Descriptions
- model: Model name.
- metric / benchmark: Indicator or benchmark name.
- value: Officially disclosed figure; speed and efficiency data are OpenAI's comparison basis.
- note: Supplementary notes.
- Prices are in U.S. dollars; benchmark data are as released by OpenAI on October 26, 2026.