tokevenGeminivsGrok
Gemini 3.5 Flash vs Grok 4.5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Gemini 3.5 Flash
Fast / BudgetGrok 4.5
FlagshipInput $/MTok
$1.50
$2.00
Output $/MTok
$9.00
$6.00
Cache discount
90% off
85% off
Context
1,000K
500K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
68
vs
0
Code Review
65
vs
0
Summarization
85
vs
0
Q&A
84
vs
0
Extraction
90
vs
0
Reasoning
60
vs
0
Classification
92
vs
0
Creative Writing
55
vs
0
Gemini 3.5 Flash
Grok 4.5
Guidance
When to use Gemini 3.5 Flash vs Grok 4.5
Choose Gemini 3.5 Flash when...
- -Cost matters: 25% cheaper on input tokens
- -You need a larger context window (1,000K vs 500K)
Choose Grok 4.5 when...
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Gemini 3.5 Flash
Grok 4.5
100K tokens
$0.38
$0.32Cheaper
1M tokens
$3.75Cheaper
$6.40
10M tokens
$37.50Cheaper
$64.00
FAQ
When should I use Gemini 3.5 Flash instead of Grok 4.5?
Gemini 3.5 Flash and Grok 4.5 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Grok 4.5 cheaper than Gemini 3.5 Flash?
Grok 4.5 input costs $2.00/MTok, which is 33% more than Gemini 3.5 Flash at $1.50/MTok.
What are the context window sizes for Gemini 3.5 Flash and Grok 4.5?
Gemini 3.5 Flash has a 1,000K token context window. Grok 4.5 has a 500K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Other comparisons
How Gemini 3.5 Flash and Grok 4.5 stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.