GPT-5.6 SolvsSeed 2.0 Pro
GPT-5.6 Sol leads the overall Podium Score by 40.8 points (80.8 vs 40.0).Category wins: GPT-5.6 Sol 4 — 0 Seed 2.0 Pro.Seed 2.0 Pro is the cheaper pick ($3/M vs $30/M per 1M output tokens). GPT-5.6 Sol is faster (72 t/s vs 40 t/s).
Key VerdictAggregated 2026 Benchmark Analysis
GPT-5.6 Sol is rated higher overall with a Podium Score of 80.8 (vs 40.0 for Seed 2.0 Pro). In head-to-head domain evaluations, GPT-5.6 Sol outperforms in 4 of 7 benchmark categories.
Coding & Engineering
GPT-5.6 Sol (64.8)
Inference Speed
GPT-5.6 Sol (72 t/s)
Cost Efficiency
Seed 2.0 Pro ($3/M/M)
| Metric | GPT-5.6 Sol | Seed 2.0 Pro |
|---|---|---|
| Podium Score | 80.8 ▲ | 40.0 |
| Arena Elo | 1483 ▲ | 1456 |
| Intelligence Index | 59.0 | — |
| Coding | 64.8 ▲ | 9.9 |
| Math | 70.7 ▲ | 47.2 |
| Reasoning | 87.6 ▲ | 34.2 |
| Agentic | 33.9 | — |
| Knowledge | 22.0 | — |
| Multimodal | 97.4 | — |
| Long-context | 100.0 ▲ | 13.8 |
| Output speed | 72 t/s ▲ | 40 t/s |
| Output price | $30/M | $3/M ▲ |
| Context window | 1100K ▲ | 131K |
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: GPT-5.6 Sol vs Claude Mythos · GPT-5.6 Sol vs Claude Fable 5 · GPT-5.6 Sol vs Kimi K3 · GPT-5.6 Sol vs Claude Opus 5