Gemini 3.8 Flash vs Grok 4.6

Price, context window & benchmark comparison

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Gemini 3.8 Flash

Google
$0.75 / $3.75
Input / Output · per 1M tokens
VS
X

Grok 4.6

xAI
$2.00 / $6.00
Input / Output · per 1M tokens
Compare different models
G
X
Verdict: Gemini 3.8 Flash is 2.0× cheaper than Grok 4.6 on a typical 3:1 input/output mix. Grok 4.6 scores higher on the Artificial Analysis Intelligence Index (44.3 vs 40.9). Gemini 3.8 Flash has the larger context window (1M vs 500K).
Gemini 3.8 FlashGrok 4.6
Input price / 1M$0.75$2.00
Output price / 1M$3.75$6.00
Blended price (3:1)$1.50$3.00
Cached input / 1M$0.075$0.50
Context window1M500K
Max output66K450K
Intelligence index40.944.3
Coding index76.376.8
Providers65
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-022026-08-12
Retirement——

Cost calculator

FAQ

Which is cheaper, Gemini 3.8 Flash or Grok 4.6?

Gemini 3.8 Flash is 2.0× cheaper than Grok 4.6 on a typical 3:1 input/output mix.

Gemini 3.8 Flash vs Grok 4.6: which has a bigger context window?

Gemini 3.8 Flash: 1,048,576 tokens. Grok 4.6: 500,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 3.8 Flash ≈ $3,375, Grok 4.6 ≈ $7,000.

More comparisons

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