Calibration
τ²-bench results → BFCL v4
BFCL v4 is estimated from τ²-bench results with a Hill curve fitted on 5 models measured on both: y = 0.4492 + (1.2000 − 0.4492)·x^6.00 / (1.05991^6.00 + x^6.00), R² = 0.61, cross-validated error 9.8 pp. It is used for 53 estimates.
| Estimated model | τ²-bench results | BFCL v4 | Source |
|---|---|---|---|
| Agents-A1-4B | 78.2% | 55.3% | estimated ± 9.8 pp, low confidence |
| Claude 3 Haiku | 21.1% | 44.9% | estimated ± 9.8 pp, low confidence |
| Claude 4.1 Opus Thinking | 71.4% | 51.3% | estimated ± 9.8 pp, low confidence |
| Claude 4 Sonnet | 52.3% | 46.0% | estimated ± 9.8 pp, low confidence |
| Claude Opus 4.5 Thinking | 89.5% | 64.9% | estimated ± 9.8 pp, low confidence |
| Claude Opus 4.6 (Adaptive) | 92.1% | 67.5% | estimated ± 9.8 pp, low confidence |
| Claude Opus 4.7 | 74.0% | 52.7% | estimated ± 9.8 pp, low confidence |
| DeepSeek-R1 | 36.5% | 45.0% | estimated ± 9.8 pp, low confidence |
| DeepSeek V3.1 | 34.8% | 45.0% | estimated ± 9.8 pp, low confidence |
| DeepSeek V3.1 (Reasoning) | 37.4% | 45.1% | estimated ± 9.8 pp, low confidence |
| Exaone 4.0 1.2B | 20.5% | 44.9% | estimated ± 9.8 pp, low confidence |
| Exaone 4.0 32B | 4.1% | 44.9% | estimated ± 9.8 pp, low confidence |
| Gemini 2.5 Flash | 14.9% | 44.9% | estimated ± 9.8 pp, low confidence |
| Gemini 3 Pro | 87.1% | 62.6% | estimated ± 9.8 pp, low confidence |
| GLM-4.5-Air | 46.5% | 45.5% | estimated ± 9.8 pp, low confidence |
| GLM-4.6 | 76.9% | 54.5% | estimated ± 9.8 pp, low confidence |
| GPT-4.1 | 47.1% | 45.5% | estimated ± 9.8 pp, low confidence |
| GPT-5.1-Codex | 83.0% | 59.0% | estimated ± 9.8 pp, low confidence |
| GPT-5.1-Codex-Max | 83.0% | 59.0% | estimated ± 9.8 pp, low confidence |
| GPT-5.2 | 84.8% | 60.5% | estimated ± 9.8 pp, low confidence |
| GPT-5.2-Codex | 92.1% | 67.5% | estimated ± 9.8 pp, low confidence |
| GPT-5.3 Codex | 86.0% | 61.6% | estimated ± 9.8 pp, low confidence |
| GPT-5 (medium) | 86.5% | 62.0% | estimated ± 9.8 pp, low confidence |
| Granite-4.0-350M | 13.2% | 44.9% | estimated ± 9.8 pp, low confidence |
| Granite-4.0-H-1B | 19.6% | 44.9% | estimated ± 9.8 pp, low confidence |
| Granite-4.0-H-350M | 14.6% | 44.9% | estimated ± 9.8 pp, low confidence |
| Grok 4 | 74.9% | 53.2% | estimated ± 9.8 pp, low confidence |
| Grok 4.1 Fast | 63.7% | 48.3% | estimated ± 9.8 pp, low confidence |
| Grok 4.1 Fast (Reasoning) | 93.3% | 68.8% | estimated ± 9.8 pp, low confidence |
| Grok 4 Fast (Reasoning) | 65.8% | 49.0% | estimated ± 9.8 pp, low confidence |
| Grok Code Fast 1 | 75.7% | 53.7% | estimated ± 9.8 pp, low confidence |
| Kimi K2 | 61.1% | 47.6% | estimated ± 9.8 pp, low confidence |
| LFM2.5-VL-1.6B-Extract | 8.5% | 44.9% | estimated ± 9.8 pp, low confidence |
| Llama 3.1 405B | 19.0% | 44.9% | estimated ± 9.8 pp, low confidence |
| Mistral Large 2 | 30.7% | 45.0% | estimated ± 9.8 pp, low confidence |
| Mistral Medium 3 | 24.3% | 44.9% | estimated ± 9.8 pp, low confidence |
| Nemotron Ultra 253B | 11.4% | 44.9% | estimated ± 9.8 pp, low confidence |
| Nova Pro | 14.0% | 44.9% | estimated ± 9.8 pp, low confidence |
| o1 | 62.6% | 48.0% | estimated ± 9.8 pp, low confidence |
| o3 | 80.7% | 57.2% | estimated ± 9.8 pp, low confidence |
| o3-mini | 28.7% | 44.9% | estimated ± 9.8 pp, low confidence |
| Phi-4 | 0.0% | 44.9% | estimated ± 9.8 pp, low confidence |
| Qwen3.5-27B | 93.9% | 69.4% | estimated ± 9.8 pp, low confidence |
| Qwen3.5-35B-A3B | 89.2% | 64.6% | estimated ± 9.8 pp, low confidence |
| Qwen3.5 397B (Reasoning) | 83.9% | 59.7% | estimated ± 9.8 pp, low confidence |
| Qwen 3.6 Max (preview) | 95.9% | 71.5% | estimated ± 9.8 pp, low confidence |
| Qwen3 Max | 74.3% | 52.9% | estimated ± 9.8 pp, low confidence |
| Qwen3-Omni-30B-A3B-Instruct | 16.4% | 44.9% | estimated ± 9.8 pp, low confidence |
| Qwen3-Omni-30B-A3B-Thinking | 21.3% | 44.9% | estimated ± 9.8 pp, low confidence |
| Sarvam 105B | 46.8% | 45.5% | estimated ± 9.8 pp, low confidence |
| Sarvam 30B | 34.5% | 45.0% | estimated ± 9.8 pp, low confidence |
| Solar Pro 2 | 31.9% | 45.0% | estimated ± 9.8 pp, low confidence |
| Ternary Bonsai 2 27B | 80.2% | 56.8% | estimated ± 9.8 pp, low confidence |