Head to head
Claude Opus 5 vs GPT-5.6 Sol
GPT-5.6 Sol costs 1.2x less per solved task.
On output token price alone, Claude Opus 5 looks 1.2x cheaper. The ranking reverses once you divide by pass rate — the cheaper tokens do not win the task.
| Claude Opus 5 | GPT-5.6 Sol | |
|---|---|---|
| Input $/Mtok | $5 | $5 |
| Output $/Mtok | $25 | $30 |
| Cached in $/Mtok | $0.5 | $0.5 |
| Pass rate | 68% | 65% |
| Cost per solved task | $12.01 | $9.88 |
Heavy task tier. Prices verified 2026-08-21.Methodology ·Claude Opus 5 ·GPT-5.6 Sol