# Vals SWE-bench → FrontierCode 1.1 Extended

Calibration · https://benchgap.net/calibration/1592 · data retrieved 2026-10-29

FrontierCode 1.1 Extended is estimated from Vals SWE-bench with a Hill curve fitted on 5 models measured on both: y = 0.0000 + (1.2000 − 0.0000)·x^6.00 / (0.95815^6.00 + x^6.00), R² = 0.69, cross-validated error 2.4 pp. It is used for 3 estimates.

| Estimated model | Vals SWE-bench | FrontierCode 1.1 Extended | Source |
|---|---|---|---|
| [DeepSeek V4 Pro 0813](https://benchgap.net/model/deepseek-v4-pro-0813.md) | 96.4% | 61.1% | estimated ± 2.4 pp, medium confidence |
| [GLM-5.3](https://benchgap.net/model/glm-5-3.md) | 95.4% | 59.2% | estimated ± 2.4 pp, medium confidence |
| [GLM-5.3-Flash](https://benchgap.net/model/glm-5-3-flash.md) | 92.0% | 52.7% | estimated ± 2.4 pp, low confidence |

## Fitted on

| Model | Vals SWE-bench | FrontierCode 1.1 Extended |
|---|---|---|
| [Claude Opus 5](https://benchgap.net/model/claude-opus-5.md) | 97.0% | 63.6% |
| [GPT-5.6 Luna](https://benchgap.net/model/gpt-5-6-luna.md) | 93.0% | 55.1% |
| [GPT-5.6 Sol](https://benchgap.net/model/gpt-5-6-sol.md) | 96.2% | 60.6% |
| [GPT-5.6 Terra](https://benchgap.net/model/gpt-5-6-terra.md) | 95.4% | 55.8% |
| [Grok 4.6](https://benchgap.net/model/grok-4-6.md) | 95.6% | 61.3% |