Gemini 2.5 Pro vs Gemini 3.1 Pro
How Gemini 2.5 Pro (Google) and Gemini 3.1 Pro (Google) compare on price and capabilities — and how to use either on anyAInow without a subscription.
Gemini 2.5 Pro
Flagship
Gemini 3.1 Pro
Flagship
Provider
Google
Google
Best for
Flagship
Flagship
Reads images
Yes
Yes
GPQA Diamond
83%
94.3%
SWE-Bench Verified
63.2%
80.6%
Price
from $20 / 1M
from $20 / 1M
Subscription
None
None
Benchmark source: llm-stats.com, as of 28 Jun 2026. Higher is better; figures are publisher-reported where not independently verified.
Gemini 2.5 Pro or Gemini 3.1 Pro?
Gemini 2.5 Pro and Gemini 3.1 Pro both sit in the flagship tier, so they're closely matched for everyday work. On the GPQA Diamond reasoning benchmark, Gemini 3.1 Pro leads 94.3% to 83%. On anyAInow you can use either — or run both side by side to see which answers your prompts better — pay-as-you-go with no subscription.