Intelligence Index vs cost per task
Data table
| Model | Effort | Index | Cost per task |
|---|
| Claude Opus 5.5 | low | 42.3 | $0.55 |
| Claude Opus 5.5 | medium | 51.2 | $1.34 |
| Claude Opus 5.5 | high | 53.6 | $1.82 |
| Claude Opus 5.5 | xhigh | 56.0 | $3.46 |
| Claude Opus 5.5 | max | 57.6 | $5.98 |
| Claude Fable 5.1 | low | 46.8 | $2.37 |
| Claude Fable 5.1 | medium | 48.9 | $2.98 |
| Claude Fable 5.1 | high | 51.1 | $3.91 |
| Claude Fable 5.1 | xhigh | 53.2 | $5.98 |
| Claude Fable 5.1 | max | 53.4 | $7.63 |
| GPT-6 Astra | low | 45.8 | $0.82 |
| GPT-6 Astra | medium | 49.6 | $1.54 |
| GPT-6 Astra | high | 50.9 | $1.73 |
| GPT-6 Astra | xhigh | 52.4 | $2.31 |
| GPT-6 Astra | max | 52.7 | $3.26 |
| GPT-6 Sol | low | 33.9 | $0.13 |
| GPT-6 Sol | medium | 39.8 | $0.25 |
| GPT-6 Sol | high | 42.8 | $0.37 |
| GPT-6 Sol | xhigh | 44.1 | $0.53 |
| GPT-6 Sol | max | 47.5 | $1.06 |
| GPT-6 Luna | low | 20.9 | $0.004 |
| GPT-6 Luna | medium | 29.5 | $0.017 |
| GPT-6 Luna | high | 32.1 | $0.029 |
| GPT-6 Luna | xhigh | 33.9 | $0.042 |
| GPT-6 Luna | max | 37.3 | $0.068 |
| GPT-5.6 Sol | low | 33.5 | $0.26 |
| GPT-5.6 Sol | medium | 39.2 | $0.51 |
| GPT-5.6 Sol | high | 42.4 | $0.81 |
| GPT-5.6 Sol | xhigh | 44.0 | $1.18 |
| GPT-5.6 Sol | max | 47.0 | $1.99 |