GPT-5.5 vs Mistral Large
How GPT-5.5 (OpenAI) and Mistral Large (Mistral) compare on price and capabilities — and how to use either on anyAInow without a subscription.
GPT-5.5
Flagship
Mistral Large
Flagship
Provider
OpenAI
Mistral
Best for
Flagship
Flagship
Reads images
Yes
No
GPQA Diamond
93.6%
43.9%
Price
from $50 / 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.
GPT-5.5 or Mistral Large?
GPT-5.5 and Mistral Large both sit in the flagship tier, so they're closely matched for everyday work. Mistral Large is the more cost-efficient of the two. GPT-5.5 can also read image inputs, while Mistral Large is text-only. On the GPQA Diamond reasoning benchmark, GPT-5.5 leads 93.6% to 43.9%. 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.