Concept Synth INDUCTION Challenge64 Holdout
General QA
Post-selection diagnostic for direct Round-1 Challenge64 formulas: train-correct responses verified correct on all available generated holdout worlds, divided by all 64 tasks. Tasks without verified holdout success receive no credit, including unavailable holdout worlds; missing outcomes remain unknown in the underlying records. Holdout results are never used for prompting or response selection.
Top models (higher is better)
| Model | Score |
|---|---|
| GPT-6 Astra | 85.9 |
| GPT-6.1 Sol | 65.6 |
| Claude Opus 5.5 | 54.7 |
| Claude Sonnet 5.5 | 40.6 |
| GPT-6 Sol | 37.5 |
| GPT-5.6 Sol | 29.7 |
| Claude Fable 5.1 | 29.7 |
| Claude Opus 5 | 26.6 |
| GPT-5.6 Terra | 25.0 |
| Claude Fable 5 | 23.4 |
| Grok 4.6 | 23.4 |
| Muse Spark 1.1 | 21.9 |
| Grok 4.7 | 18.8 |
| GPT-6 Luna | 18.8 |
| Grok 4 | 17.2 |
| GPT-5.4 | 14.1 |
| Gemini 3.7 Flash | 14.1 |
| Grok 4.5 | 12.5 |
| Gemini 3.8 Flash | 12.5 |
| GPT-5.6 Luna | 10.9 |
| Muse Spark 1.2 | 10.9 |
| Gemini 3.5 Flash | 9.4 |
| DeepSeek V4 Pro 0813 | 7.8 |
| Kimi K3 | 7.8 |
| Grok 4.1 Fast | 7.8 |
| DeepSeek-V4-Pro | 6.3 |
| Opus 4.6 | 6.3 |
| DeepSeek V4.1 Flash | 4.7 |
| Gemini 3.6 Flash | 4.7 |
| Kimi K2.7 Code | 4.7 |
| Opus 4.8 | 4.7 |
| Kimi K2.6 | 4.7 |
| GPT-5.2 | 3.1 |
| Sonnet 5 | 3.1 |
| Grok 4.3 | 3.1 |
| Gemini 3 Pro Preview | 1.6 |
| DeepSeek-V3.2 | 1.6 |
| Gemini 3.1 Pro Preview | 0.0 |
| Opus 4.5 | 0.0 |
| GPT-4o | 0.0 |