DeepSeek R1 vs GPT-5.5
How DeepSeek R1 (DeepSeek) and GPT-5.5 (OpenAI) compare on price and capabilities — and how to use either on anyAInow without a subscription.
DeepSeek R1
Reasoning
GPT-5.5
Flagship
Provider
DeepSeek
OpenAI
Best for
Reasoning
Flagship
Reads images
No
Yes
GPQA Diamond
81%
93.6%
SWE-Bench Verified
44.6%
—
MMLU-Pro
85%
—
Price
from $10 / 1M
from $50 / 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.
DeepSeek R1 or GPT-5.5?
DeepSeek R1 is a reasoning-tier model, while GPT-5.5 is flagship-tier. DeepSeek R1 is the more cost-efficient of the two. GPT-5.5 can also read image inputs, while DeepSeek R1 is text-only. On the GPQA Diamond reasoning benchmark, GPT-5.5 leads 93.6% to 81%. 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.