Gemini 3.8 Flash (Medium) vs Grok 4.3 (High)
Which is better for the money: Gemini 3.8 Flash (Medium) by Google or Grok 4.3 (High) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
Gemini 3.8 Flash (Medium) scores 14.9 points higher (39.8 vs 24.9) but costs 3.0× as much to run the benchmark ($1100 vs $363; premium vs mid-range cost classes). They are not alternatives at one budget: pick Gemini 3.8 Flash (Medium) when you need intelligence above 24.9, and Grok 4.3 (High) when 24.9 is enough.
| Metric | Gemini 3.8 Flash (Medium) | Grok 4.3 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 39.8 | 24.9 | −37.4% Grok 4.3 (High) is 37.4% less intelligent |
| Total AA cost (lower is better) | $1,100.06 | $363.24 | −67.0% Grok 4.3 (High) is 67.0% cheaper |
| End-to-end time (lower is better) | Not reported | 24.88s | — not comparable |
| Price per 1M tokens (in / out) | $0.75 / $3.75 | $1.25 / $2.50 | |
| Input modalities | Text, Image, Speech, Video | Text, Image |
Grok 4.3 (High) vs Gemini 3.8 Flash (Medium): 37.4% less intelligence, 67.0% less cost to run the AA benchmark, and end-to-end time not fully reported.
Today's Pareto frontier
Against the frontier
- Gemini 3.8 Flash (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- Grok 4.3 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.
Gemini 3.8 Flash (Medium)Grok 4.3 (High)Today's Pareto frontierEvery other model
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gemini-3-8-flash-medium/grok-4-3 · Markdown: /api/v1/compare/gemini-3-8-flash-medium/grok-4-3?format=md · llms.txt · agent skill