Grok 4.6 vs Gemini 3.8 Flash
API pricing, benchmark indices and specs — updated 5 November 2026.
google · B · API-only
Input / 1M
$0.83
Output / 1M
$4.13
AA index
30.8
proprietary · 1M context
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | Grok 4.6 | Gemini 3.8 Flash |
|---|---|---|
| Deployment | API-only (closed weights) | API-only (closed weights) |
| Parameters | n/a — API-only | n/a — API-only |
| Architecture | n/a — API-only | n/a — API-only |
| Context length | 500,000 | 1,048,576 |
| Licence | Proprietary | Proprietary |
| Commercial use | Per API terms | Per API terms |
| Languages | n/a — API-only | n/a — API-only |
| Downloads 30d | n/a — API-only | n/a — API-only |
| Downloads all time | n/a — API-only | n/a — API-only |
| Quantizations on the Hub | n/a — API-only | n/a — API-only |
| Gated | n/a — API-only | n/a — API-only |
| First seen on the Hub | n/a — API-only | n/a — API-only |
| API input price / 1M tokens | $2.00 | $0.83 |
| API output price / 1M tokens | $6.00 | $4.13 |
| Est. cost per 1M input + 1M output tokens | $8.00 | $4.95 |
| Cached input / 1M tokens | $0.50 | $0.083 |
| AA Intelligence Index | 31 | 30.8 |
| AA Coding Index | 75.9 | 76.3 |
| AA Agentic Index | 52.5 | 40.2 |
| Max output tokens | 450,000 | 65,536 |
| API providers | 2 | 2 |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
Grok 4.6
$8.00
Gemini 3.8 Flash
$4.95
Gemini 3.8 Flash is 1.6× cheaper at list price.