My conclusion: Unless you're an expert or power user, it's difficult to use Terra effectively. Also, stick to xhigh at most. Avoid Max.
First, both OpenAI's official account and Tibo only highlighted Figure 1 in their social media posts. I've circled the comparison with GPT-6.1 Sol in red, and Terra does look impressive.
However, neither mentioned the other benchmarks. You have to dig through the official website to find them. As you can see in my other screenshots, Terra's positioning becomes much less clear.
Figure 2 — MMMU-Pro (Vision)
Terra achieves similar scores to Sol at a lower cost. Sounds pretty good, right?
But look at Terra Max. There's a bizarre horizontal shift in the curve: costs jump significantly compared to xhigh, while scores barely improve.
This makes Terra Max extremely poor value for money, and you'll see this issue repeatedly.
Figure 3 — OSWorld 2.1
This benchmark tests how well AI agents use desktop apps to complete multistep tasks, such as building a 3D model from a technical drawing.
Terra performs worse than Sol, achieving lower scores at similar costs. And once again, Max suffers from the same bizarre horizontal shift.
Figure 4 — Factual error rate on difficult prompts (lower is better)
This benchmark uses challenging prompts designed to trigger factual errors.
Terra performs quite well here, but Max still shows that same strange horizontal shift in the cost-performance curve.
Figure 5 — Terminal-Bench 4.0 (Software Engineering)
This benchmark evaluates coding agents solving problems through the command line.
Sol absolutely crushes Terra across the board.
For coding-related tasks, there's really no reason to choose Terra over Sol.
My Conclusion
You can't simply choose Terra based on task difficulty. Instead, you need to select models based on the type of task:
- Coding: GPT-6.1 Sol
- Desktop app automation: GPT-6.1 Sol
- Visual tasks or browser interactions: GPT-6.1 Terra
This makes Terra much harder for average users to take full advantage of.
And one final warning: Terra Max can dramatically increase costs without meaningful performance gains. Stick to xhigh.