Step 5 Preview vs GPT 5.6 Terra
Step 5 Preview and GPT 5.6 Terra side by side on shared benchmark boards, Codex Radar runs and the lowest real price per million tokens.
| Best score per board | Step 5 Preview | GPT 5.6 Terra |
|---|---|---|
| Developer | StepFun | OpenAI |
| Artificial Analysis Intelligence Index v4.3 | 43.7 | 42.1 |
| Terminal-Bench 4.0 | — | 21.5 |
| Terminal-Bench 4.0 (AA) | 33.3 | 35.4 |
| Code Arena | WebDev Overall | 1570.0 | 1519.0 |
| Agent Arena · Overall (Ranking / Pareto) | — | 0.8 |
| DeepSWE v1.1 | — | 69.6 |
| Radar IQ (Codex) | — | 100.9 |
| Lowest real price / MTok | $0.0036 | $0.0080 |
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