GPT-5.4 vs GPT-5.5

Reading a 26.2K-token pull request costs $0.131 on GPT-5.5, 2.0× the $0.0655 it costs on GPT-5.4. Both are GPT models, so the difference is one version of the same line against another.

GPT-5.4GPT-5.5

Side by side

GPT-5.4 and GPT-5.5 side by side
Figure	GPT-5.4	GPT-5.5
Price tier	Mid-range	Frontier
Typical review calllist price	$0.1018 (better)	$0.2035
Input / 1M tokens	$2.50 (better)	$5.00
Output / 1M tokens	$15.00 (better)	$30.00
Context window	1.1M	1.1M

Not benchmarked yet

GPT-5.4 and GPT-5.5 aren't benchmarked yet, so this page compares list prices only. Measured bugs caught, false alarms and a bug-by-bug comparison appear here once both have results.

See measured models