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
1.0M
500K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
61
vs
61
Code Review
65
vs
0
Summarization
76
vs
71
Q&A
84
vs
0
Extraction
73
vs
72
Reasoning
82
vs
87
Classification
92
vs
0
Creative Writing
75
vs
74
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...
- -You need strong summarization (confidence 76 vs 71)
- -You need strong creative writing (confidence 75 vs 74)
- -You need strong extraction (confidence 73 vs 72)
- -Cost matters: 25% cheaper on input tokens
- -You need a larger context window (1.0M vs 500K)
Choose Grok 4.5 when...
- -You need strong reasoning (confidence 87 vs 82)
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 outperforms Grok 4.5 for Summarization, Extraction, Creative Writing. It costs $1.50/$9.00 per million tokens (input/output).
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 1.0M 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.