Gemini 2.5 Pro vs Gemini 3.5 Flash
Input price
$1.25
$1.50
Output price
$10.00
$9.00
Context window
1049K
1049K
Throughput
155 tok/s
157 tok/s
Availability
97.8%
99.9%
Cost / task
$0.008
$0.008
Efficiency score
92
92
Estimated monthly cost by workload
Metric
GEMINI-2.5-PRO
GEMINI-3.5-FLA
Chat assistant
$1,575
$1,530
RAG / long context
$2,400
$2,610
Agent / tool use
$4,500
$4,320
Efficiency score: Gemini 2.5 Pro
Across price, speed and reliability, Gemini 2.5 Pro offers the stronger overall balance for most workloads — but the right pick depends on your exact mix of input, output and latency needs.
Figures are illustrative demo data, not financial advice.
Frequently asked questions
Is Gemini 2.5 Pro or Gemini 3.5 Flash cheaper?+
Gemini 2.5 Pro has the lower input price — $1.25 vs $1.50 per 1M tokens — so for most blended workloads it is the more cost-effective of the two. Figures are illustrative demo data.
Which should I choose, Gemini 2.5 Pro or Gemini 3.5 Flash?+
Across price, speed and reliability, Gemini 2.5 Pro offers the stronger overall balance for most workloads — but the right pick depends on your exact mix of input, output and latency needs.