GPT-5 vs Gemini 3 Ultra
OpenAI's polish meets Google's million-token context.
Cheapest
Gemini 3 Ultra
$1.50 / 1M tok
Highest quality
GPT-5
9.2 / 10
Best V-Index
Gemini 3 Ultra
5.93
| Dimension | GPT-5 | Gemini 3 Ultra |
|---|---|---|
| Vendor | OpenAI | |
| Input price ($ / 1M tok) | $2.50 | $1.50 |
| Quality (1–10) | 9.2 | 8.9 |
| V-Index (Quality ÷ Price) | 3.68 | 5.93 |
| reasoning precision | High | High |
| coding precision | High | High |
| creative precision | High | Medium |
| factual precision | High | High |
| summarization precision | High | High |
| extraction precision | High | High |
Verdict
For raw value-per-token, Gemini 3 Ultra wins on V-Index (5.93 vs 3.68). For absolute quality on reasoning-heavy work, GPT-5 is the safer pick. Run your real prompt through the auditor below to see which one wins for your specific workload.
Scaling Roadmap
To scale your prompt engineering workflow: 1. Audit (1-2 days) to identify the optimal model. 2. Implement via API (3-5 days) using the chosen model. 3. Monitor V-Index drift (ongoing) as new models release.
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