Head to head
Gemini 3.1 Pro (preview) vs GPT-5.4 For light moderate heavy
Verdict · modelled basis
GPT-5.4 costs $1.86 per solved task against
Gemini 3.1 Pro (preview) at $1.91 — ▼ 1.0x cheaper .
Over 200 tasks that is $10 a month.
On output token price alone Gemini 3.1 Pro (preview) looks 1.3x cheaper. The ranking reverses once you divide by pass rate — the cheaper tokens do not win the task.
Copy link Save scenario Download table Pro
Verified pricing, pass rate and cost per solved task for Gemini 3.1 Pro (preview) and GPT-5.4 Figure Gemini 3.1 Pro (preview) GPT-5.4 Input $/Mtok $2 $2.5 Output $/Mtok $12 $15 Cached input $/Mtok $0.2 $0.25 Pass rate 46% 59% Cost per solved task $1.91 modelled $1.86 modelled Cost per month $382 $372
Cost per month against tasks per month · drag the marker
Monthly cost against tasks per month Log-log lines for GPT-5.4 (modelled, $1.86 per solved task), Gemini 3.1 Pro (preview) (modelled, $1.91 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks. 10 100 1k 10k 100k $100 $1k $10k $100k TASKS / MONTH (log) → 200 tasks GPT-5.4 · MODELLED · $1.86 per solved task $372 GPT-5.4 MODELLED Gemini 3.1 Pro (preview) · MODELLED · $1.91 per solved task $382 Gemini 3.1 Pro (prev… MODELLED Monthly cost against tasks per month Log-log lines for GPT-5.4 (modelled, $1.86 per solved task), Gemini 3.1 Pro (preview) (modelled, $1.91 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks. 10 100 1k 10k 100k $100 $1k $10k $100k TASKS / MONTH (log) → 200 tasks GPT-5.4 · MODELLED · $1.86 per solved task $372 Gemini 3.1 Pro (preview) · MODELLED · $1.91 per solved task $382 — GPT-5.4 · MODELLED — Gemini 3.1 Pro (preview) · MODELLED Solid measured · dashed modelled · dotted stale. The gap is the verdict.
Source: Scale SEAL leaderboard, SWE-bench Pro · verified 2026-08-21 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings