o3 vs Gemini 2.5 Pro: which is better?

o3 leads on combined benchmark scores (95.1 vs 89.7) across general knowledge, coding, and math, as of 2026-07-27.

Which is cheaper, o3 or Gemini 2.5 Pro?

Gemini 2.5 Pro is cheaper on a typical API workload, at roughly 1.1x lower cost than the alternative at published per-token rates.

o3 vs Gemini 2.5 Pro

o3 leads on benchmarks; Gemini 2.5 Pro is cheaper to run.

Updated 2026-07-27

OpenAI · Closed

95.1

Combined index

Leads

Gemini 2.5 Pro

Google · Closed

89.7

Combined index

Benchmarks

General knowledge (MMLU)

91.6

90.1

Coding

95.8

84.2

Math

97.9

94.7

API pricing

$2.0 Input / 1M $1.25

$8.0 Output / 1M $10.0

$80.0 Monthly, est. $75.0

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.

o3 costs → Gemini 2.5 Pro costs → Full leaderboard → All comparisons →