Gemini 2.5 Pro vs Gemini 2.5 Flash: which is better?

Gemini 2.5 Pro leads on combined benchmark scores (89.7 vs 85.9) across general knowledge, coding, and math, as of 2026-07-27.

Which is cheaper, Gemini 2.5 Pro or Gemini 2.5 Flash?

Gemini 2.5 Flash is cheaper on a typical API workload, at roughly 4.1x lower cost than the alternative at published per-token rates.

Gemini 2.5 Pro vs Gemini 2.5 Flash

Gemini 2.5 Pro leads on benchmarks; Gemini 2.5 Flash is cheaper to run, about 4.1× less.

Updated 2026-07-27

Gemini 2.5 Pro

Google · Closed

89.7

Combined index

Leads

Gemini 2.5 Flash

Google · Closed

85.9

Combined index

Benchmarks

General knowledge (MMLU)

90.1

87.5

Coding

84.2

Math

94.7

89.2

API pricing

$1.25 Input / 1M $0.3

$10.0 Output / 1M $2.5

$75.0 Monthly, est. $18.5

Monthly estimate assumes 20M input + 5M output tokens. Prices marked ~ are representative hosted rates for open-weight models and vary by provider. Run your own numbers in the cost calculator.

Gemini 2.5 Pro costs → Gemini 2.5 Flash costs → Full leaderboard → All comparisons →