GPT-6.1 Terra (Xhigh) vs Step 5 Preview
Which is better for the money: GPT-6.1 Terra (Xhigh) by OpenAI or Step 5 Preview by StepFun? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Clear winner
Verdict
Pick GPT-6.1 Terra (Xhigh)
Step 5 Preview vs GPT-6.1 Terra (Xhigh): 3.7% less intelligence, 226.1% more cost to run the AA benchmark, and 23.8% faster end-to-end.
| Metric | GPT-6.1 Terra (Xhigh) | Step 5 Preview | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 45.4 | 43.7 | −3.7% Step 5 Preview is 3.7% less intelligent |
| Total AA cost (lower is better) | $364.95 | $1,190.26 | +226.1% Step 5 Preview is 3.3× more expensive |
| End-to-end time (lower is better) | 18.82s | 14.34s | −23.8% Step 5 Preview is 23.8% faster |
| Price per 1M tokens (in / out) | $1.00 / $5.00 | $1.00 / $2.70 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-6.1 Terra (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.
- Step 5 Preview is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-6.1 Terra (Xhigh)Step 5 PreviewToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-1-terra-xhigh/step-5 · Markdown: /api/v1/compare/gpt-6-1-terra-xhigh/step-5?format=md · llms.txt · agent skill