GPT-6.1 Terra Pro
GPT-6.1 Terra Pro is the same underlying model as [GPT-6.1 Terra](https://openrouter.ai/openai/gpt-6.1-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...
Specifications
| Lab | OpenAI |
|---|---|
| Context window | 1.1M tokens |
| Input price | $1.00/1M |
| Output price | $5.00/1M |
| Release | Oct 2026 |
Strengths
- Pro reasoning mode for higher quality on complex tasks
- Same 1.05M-token context window as base Terra
- Stronger multi-step problem solving than standard mode
Weaknesses
- Pro mode spends far more tokens per response
- Higher effective cost despite same list price
- Limited independent benchmark data at launch
Best for
- Complex reasoning tasks
- Hard coding problems
- High-stakes agentic work
In Depth: GPT-6.1 Terra Pro
Summary
GPT-6.1 Terra Pro is an AI model from OpenAI.
Released in Oct 2026. It takes file, image, and text input and produces text output, with a context window of 1.1M tokens. Input pricing is $1.00 per 1M tokens and output is $5.00 per 1M tokens on OpenRouter.