Head to head
Gemini 3.1 Pro (preview) vs Claude Opus 4.5
Gemini 3.1 Pro (preview): currentClaude Opus 4.5: legacyheavy tier
Verdict · modelled basis
Gemini 3.1 Pro (preview) costs 2.3x less per solved task.
On output token price alone, Gemini 3.1 Pro (preview) looks 2.1x cheaper (2.5x on input). The ranking holds, but the margin changes.
Source: Scale SEAL leaderboard, SWE-bench Pro · verified 2026-08-21 · prices from each provider's pricing page
Input $/M tokens
lower is better
Output $/M tokens
lower is better
Cost per solved task
modelled basis · lower is better
| Gemini 3.1 Pro (preview) | Claude Opus 4.5 | |
|---|---|---|
| Input $/Mtok | $2 | $5 |
| Output $/Mtok | $12 | $25 |
| Cached input $/Mtok | $0.2 | $0.5 |
| Pass rate | 46% | 46% |
| Pass rate source | SEAL | SEAL |
| Cost basis | modelled | modelled |
| Cost per solved task | $4.30 | $9.81 |
verified 2026-08-21 · heavy task tier; measured rows ignore the tier· Methodology· Gemini 3.1 Pro (preview)· Claude Opus 4.5