Gemini 3.5 Flash (High) vs GPT-5.5 Instant (June 2026)
Which is better for the money: Gemini 3.5 Flash (High) by Google or GPT-5.5 Instant (June 2026) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
Gemini 3.5 Flash (High) scores 6.6 points higher (32.6 vs 26.0) but costs 3.6× as much to run the benchmark ($3534 vs $987; flagship vs premium cost classes). They are not alternatives at one budget: pick Gemini 3.5 Flash (High) when you need intelligence above 26.0, and GPT-5.5 Instant (June 2026) when 26.0 is enough.
| Metric | Gemini 3.5 Flash (High) | GPT-5.5 Instant (June 2026) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 32.6 | 26.0 | −20.2% GPT-5.5 Instant (June… is 20.2% less intelligent |
| Total AA cost (lower is better) | $3,534.07 | $986.85 | −72.1% GPT-5.5 Instant (June… is 72.1% cheaper |
| End-to-end time (lower is better) | 17.13s | 16.68s | −2.6% GPT-5.5 Instant (June… is 2.6% faster |
| Price per 1M tokens (in / out) | $1.50 / $9.00 | $5.00 / $30.0 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
GPT-5.5 Instant (June 2026) vs Gemini 3.5 Flash (High): 20.2% less intelligence, 72.1% less cost to run the AA benchmark, and 2.6% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Gemini 3.5 Flash (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- GPT-5.5 Instant (June 2026) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Gemini 3.5 Flash (High)GPT-5.5 Instant (June 2026)Today's Pareto frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gemini-3-5-flash/gpt-5-5-instant-06-26 · Markdown: /api/v1/compare/gemini-3-5-flash/gpt-5-5-instant-06-26?format=md · llms.txt · agent skill