Claude Sonnet 4.6 vs Gemini 3.1 Pro
How Claude Sonnet 4.6 (Anthropic) and Gemini 3.1 Pro (Google) compare on price and capabilities — and how to use either on anyAInow without a subscription.
Claude Sonnet 4.6
Balanced
Gemini 3.1 Pro
Flagship
Provider
Anthropic
Google
Best for
Balanced
Flagship
Reads images
Yes
Yes
GPQA Diamond
87.5%
94.1%
AA Coding Index
63%
68.8%
Price
from $30 / 1M
from $20 / 1M
Subscription
None
None
Benchmark source: artificialanalysis.ai, as of 13 Aug 2026. Higher is better; figures are publisher-reported where not independently verified.
Claude Sonnet 4.6 or Gemini 3.1 Pro?
Claude Sonnet 4.6 is a balanced-tier model, while Gemini 3.1 Pro is flagship-tier. Gemini 3.1 Pro is the more cost-efficient of the two. On the GPQA Diamond reasoning benchmark, Gemini 3.1 Pro leads 94.1% to 87.5%. 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.