Gemini 3.6 FlashvsGrok 4.20 Beta
Gemini 3.6 Flash is cheaper than Grok 4.20 Beta at $1.5/M vs $2/M input tokens.
| Spec | Gemini 3.6 Flash | Grok 4.20 Beta |
|---|---|---|
| Input price | $1.5/M tokens | $2/M tokens |
| Output price | $7.5/M tokens | $6/M tokens |
| Context window | 1.0M tokens | 2.0M tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jul 2026 | Mar 2026 |
Our Verdict
Grok 4.20 Beta
Gemini 3.6 FlashRunner-up
Not enough votes to call it. On the specs, Grok 4.20 Beta has the edge: bigger model tier, bigger context window.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Gemini 3.6 Flash
Input
$1.50
1.3× cheaper
Output
$7.50
Grok 4.20 Beta
Input
$2.00
Output
$6.00
1.3× cheaper
Gemini 3.6 Flash wins input (1.3× cheaper)·Grok 4.20 Beta wins output (1.3× cheaper)
Where to run it
3 hosts, cheapest first
Gemini 3.6 Flash2 hosts
Grok 4.20 Beta1 host
Per million tokens. Prices and uptime via OpenRouter, checked 12 Sep 2026.
Writing DNA
Style Comparison
Similarity
48%
Gemini 3.6 Flash uses 4.2x more emoji
Gemini 3.6 Flash
Grok 4.20 Beta
60%Vocabulary57%
19wSentence Length20w
0.13Hedging0.35
5.4Bold4.2
2.7Lists3.7
0.04Emoji0.00
0.99Headings0.62
0.07Transitions0.14
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
Common questions
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