Gemini 2.5 Pro vs Grok 4.6
Both are Flagship-tier models, from Google and xAI respectively. Grok 4.6 is the cheaper choice overall at a 4:1 input:output ratio.
Which is cheaper
- Input price: Gemini 2.5 Pro is cheaper ($1.25 vs $2.00).
- Output price: Grok 4.6 is cheaper ($6.00 vs $10.00).
- Blended, 4:1 input:output ratio: Grok 4.6 is 6.7% cheaper ($2.80 vs $3.00 per weighted 1M tokens).
Side by side
| Spec | Gemini 2.5 Pro | Grok 4.6 |
|---|---|---|
| Provider | xAI | |
| Tier | Flagship | Flagship |
| Context window | 1.05M | 500K |
| Max output | 66K | — |
| Input $/1M | $1.25 | $2.00 |
| Output $/1M | $10.00 | $6.00 |
| Cache read $/1M | $0.125 | $0.50 |
| Modalities | text, image | text, image |
Gemini 2.5 Pro. Standard tier, <=200k tokens. >200k tier: input $2.50, output $15.00, cache $0.25/1M; cache storage $4.50/1M tokens/hour. Previous-generation flagship, still fully listed (not deprecated) on the current pricing page -- important reference point for price comparisons.
Grok 4.6. Short-context rate, for prompts under 200K tokens. At 200K and above: $4 input / $12 output, cache read $1 per 1M. xAI's Priority Processing tier doubles every rate and applies to all models — it is not a separate model.
Sources
Gemini 2.5 Pro — verified August 29, 2026
Grok 4.6 — verified August 29, 2026
Full Gemini 2.5 Pro pricing page → · Full Grok 4.6 pricing page →