GPT-5.4 vs GPT-5.5
How GPT-5.4 (OpenAI) and GPT-5.5 (OpenAI) compare on price and capabilities — and how to use either on anyAInow without a subscription.
Provider
OpenAI
OpenAI
Best for
Balanced
Flagship
Reads images
Yes
Yes
GPQA Diamond
92%
93.5%
AA Coding Index
71.1%
74.9%
Price
from $30 / 1M
from $50 / 1M
Subscription
None
None
Benchmark source: artificialanalysis.ai, as of 13 Aug 2026. Higher is better; figures are publisher-reported where not independently verified.
GPT-5.4 or GPT-5.5?
GPT-5.4 is a balanced-tier model, while GPT-5.5 is flagship-tier. GPT-5.4 is the more cost-efficient of the two. On the GPQA Diamond reasoning benchmark, GPT-5.5 leads 93.5% to 92%. 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.