Claude Opus 4.8 vs GPT-5.4
How Claude Opus 4.8 (Anthropic) and GPT-5.4 (OpenAI) compare on price and capabilities — and how to use either on anyAInow without a subscription.
Claude Opus 4.8
Flagship
GPT-5.4
Balanced
Provider
Anthropic
OpenAI
Best for
Flagship
Balanced
Reads images
Yes
Yes
GPQA Diamond
93.6%
92.8%
SWE-Bench Verified
88.6%
—
Price
from $40 / 1M
from $30 / 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.
Claude Opus 4.8 or GPT-5.4?
Claude Opus 4.8 is a flagship-tier model, while GPT-5.4 is balanced-tier. GPT-5.4 is the more cost-efficient of the two. On the GPQA Diamond reasoning benchmark, Claude Opus 4.8 leads 93.6% to 92.8%. 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.