Every OpenAI list price we can evidence, back to May 2, 2023 —
32 dated observations across 30 models.
Each row links to the page the figure was read off, usually a timestamped snapshot
in the Internet Archive. Plus 23 more points recorded by LiteLLM, an
aggregator, across 22 of the models above — not seller-verified, marked as such
in the tables below.
Steepest evidenced fall here: GPT-4o, $15.00 to $10.00 per 1M output tokens — down 33% in 274 days.
GPT-4o mini
GPT-4o
GPT-5.5 (one observation)
GPT-5.4 nano (one observation)
GPT-5.4 mini (one observation)
GPT-5.4 (one observation)
GPT-5.2 pro (one observation)
GPT-5.2 (one observation)
Showing the 8 most-observed models; 22 more are in the dated tables below.
How to read this, and what it is not
These are list prices, standard synchronous tier. Batch, cached-input
and off-peak discounts are excluded, so real bills are often lower than the line.
A date is an observation, not a change date. A snapshot dated March 2024
means the page said that in March 2024 — the price may have taken effect earlier.
Rows marked Launch or Price change do carry the vendor's own date.
Rows marked "LiteLLM, monthly" are not seller-verified. They are read from
a dated commit of LiteLLM's aggregated price file, not from the provider's own page — a
weaker guarantee than every other row here. Their date is the month a price was first
recorded in that monthly snapshot, never the day it changed, and the true change could
fall anywhere in the weeks before it. Each one still links to the exact commit it came
from, so you can check it yourself.
Gaps are gaps. Lines connect observations; they are not evidence about
the days in between, and a missing model means nobody has evidenced it yet, not
that its price held.
Same name, different thing. Models are quietly revised under a stable name.
A flat line can hide a model that got better at the same price — which is itself
a price cut per unit of capability, and one this dataset cannot see.
Prices in CNY are shown in CNY. Converting an old observation with today's
exchange rate would invent a number, so we don't.