# Vibe Code Bench → FrontierCode 1.1 Main

Calibration · https://benchgap.net/calibration/1604 · data retrieved 2026-10-29

FrontierCode 1.1 Main is estimated from Vibe Code Bench with a inverse Michaelis–Menten curve fitted on 5 models measured on both: y = 0.74004·(x − 0.0000) / (0.0000 + 2.0000 − x), R² = 0.85, cross-validated error 4.3 pp. It is used for 2 estimates.

| Estimated model | Vibe Code Bench | FrontierCode 1.1 Main | Source |
|---|---|---|---|
| [Claude Opus 4.6 (Adaptive)](https://benchgap.net/model/claude-opus-4-6-thinking.md) | 53.5% | 27.0% | estimated ± 4.3 pp, medium confidence |
| [GPT-5.2-Codex](https://benchgap.net/model/gpt-5-2-codex.md) | 37.9% | 17.3% | estimated ± 4.3 pp, low confidence |

## Fitted on

| Model | Vibe Code Bench | FrontierCode 1.1 Main |
|---|---|---|
| [Claude Opus 4.6](https://benchgap.net/model/claude-opus-4-6.md) | 57.6% | 26.9% |
| [Claude Opus 4.7](https://benchgap.net/model/claude-opus-4-7.md) | 71.0% | 38.5% |
| [Claude Sonnet 4.6](https://benchgap.net/model/claude-sonnet-4-6.md) | 51.5% | 24.3% |
| [GPT-5.4 mini](https://benchgap.net/model/gpt-5-4-mini.md) | 48.0% | 27.0% |
| [GPT-5.5](https://benchgap.net/model/gpt-5-5.md) | 69.8% | 43.0% |