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 | Sonar Pro Search Perplexity· reasoning | — | 200K | $3.00 | ? | 30 Oct 2025 |
| 2 | Sonar Pro | — | 200K | $3.00 | ? | 7 Mar 2025 |
| 3 | Sonar Reasoning Pro Perplexity· reasoning | — | 128K | $2.00 | ? | 7 Mar 2025 |
| 4 | Sonar Deep Research Perplexity· reasoning | — | 128K | $2.00 | ? | 7 Mar 2025 |
| 5 | Sonar | — | 127K | $1.00 | ? | 27 Jan 2025 |