Head to head
Span-02 scores 79.5 and Tev1 4B Experimental 71.5 on the System One Index. Span-02 is more accurate on 10 of 16 text datasets, Tev1 4B Experimental on 6. Same cases, same request, same scorer.
| Span-02 | Tev1 4B Experimental | |
|---|---|---|
| System One Index | 79.5 | 71.5 |
| English | 77.9 | 66.4 |
| Arabic | 82.3 | 75.8 |
| Vision Index | 86.1 | – |
| Calibration error | 10.5% | 5.3% |
| Median latency | 204 ms | 232 ms |
| Cost per 1,000 calls | $0.005 | $0.019 |
| Span-02 | Tev1 4B Experimental | |
|---|---|---|
| AG News English | 86.5 | 91.5 |
| SST-2 English | 95.5 | 94.0 |
| SST-5 English | 57.5 | 43.0 |
| DAIR Emotion English | 56.0 | 56.5 |
| Banking77 English | 82.0 | 1.0 |
| BoolQ English | 90.0 | 91.0 |
| XNLI English English | 83.3 | 87.3 |
| Typed decisions English | 72.1 | 67.0 |
| XNLI French French | 73.3 | 82.7 |
| XNLI Arabic Arabic | 66.0 | 76.0 |
| MASSIVE scenario Arabic | 71.0 | 56.5 |
| MASSIVE intent Arabic | 86.0 | 70.0 |
| OSACT4 offensive Arabic | 97.0 | 84.5 |
| Tweet sentiment Arabic | 76.0 | 70.5 |
| MIRACL rerank Arabic | 88.5 | 85.5 |
| MIRACL pairwise Arabic | 91.5 | 87.5 |
| Span-02 | Tev1 4B Experimental | |
|---|---|---|
| SST-2, as an image | 92.5 | – |
| Arabic sentiment, as an image | 70.0 | – |
| Oxford-IIIT Pet | 92.5 | – |
| VQAv2 yes/no | 87.0 | – |
| CountBench | 88.5 | – |
Model pages: Span-02 · Tev1 4B Experimental. Latency for API models is the median per call through OpenRouter, timed from a cloud server with 8 calls in flight.