Source: Epoch AI (CC BY 4.0). ECI is Epoch's item-response model over many benchmarks; each model page shows its 90% confidence interval.
Only models with both an ECI score and an OpenRouter price. Normalisation: 75% input + 25% output price. Click a point to open the model.
| # | Model | ECI ↓ | Context | In $/M | Weights | Released |
|---|---|---|---|---|---|---|
| 1 | GPT-6 Astra OpenAI· reasoning | 166.6 | 1.05M | $10.0 | Closed | 3 Sep 2026 |
| 2 | GPT-6 Astra (batch) OpenAI· reasoning | — | 1.05M | $5.00 | ? | 4 Sep 2026 |
| 3 | GPT-6 Sol OpenAI· reasoning | — | 1.05M | $2.00 | ? | 22 Sep 2026 |
| 4 | GPT-6 Sol (batch) OpenAI· reasoning | — | 1.05M | $1.00 | ? | 22 Sep 2026 |
| 5 | GPT-6 Luna OpenAI· reasoning | — | 1.05M | $0.10 | ? | 22 Sep 2026 |
| 6 | GPT-6 Luna (batch) OpenAI· reasoning | — | 1.05M | $0.050 | ? | 22 Sep 2026 |
| 7 | GPT-6 Sol Pro OpenAI· reasoning | — | 1.05M | $2.00 | ? | 22 Sep 2026 |
| 8 | GPT-6 Luna Pro OpenAI· reasoning | — | 1.05M | $0.10 | ? | 22 Sep 2026 |
| 9 | GPT-6 Sol Pro (batch) OpenAI· reasoning | — | 1.05M | $1.00 | ? | 22 Sep 2026 |
| 10 | GPT-6 Luna Pro (batch) OpenAI· reasoning | — | 1.05M | $0.050 | ? | 22 Sep 2026 |
| 11 | GPT-6 Astra Pro OpenAI· reasoning | — | 1.05M | $10.0 | ? | 4 Sep 2026 |
| 12 | GPT-6 Astra Pro (batch) OpenAI· reasoning | — | 1.05M | $5.00 | ? | 4 Sep 2026 |
| 13 | GPT-6 Astra (none) | — | — | — | Closed | 3 Sep 2026 |
| 14 | GPT-6 Astra (low) | — | — | — | Closed | 3 Sep 2026 |
| 15 | GPT-6 Astra (medium) | — | — | — | Closed | 3 Sep 2026 |
| 16 | GPT-6 Astra (xhigh) | — | — | — | Closed | 3 Sep 2026 |
| 17 | GPT-6 Astra (pro, max) | — | — | — | Closed | 3 Sep 2026 |
| 18 | GPT-6 Astra (unknown thinking) | — | — | — | Closed | 3 Sep 2026 |