By OpenAI

GPT-4o

An OpenAI model for everyday chat and understanding photos

Price per message

1 PMCper message(KRW 40)

Shown as x1 in the chat.

With previous-conversation memory off: 0.5 PMC (KRW 20)

Anything extra, such as input beyond the included length, attachments or paid web search, is added up and shown on the send button before you send.

1 PMC is based on KRW 40, and a payment fee is added when you buy PMC (for example, 100 PMC costs KRW 4,476).

Web search +1 PMC
Photo input
PDF and document input

Try it

Start with this model

Start from an example

Nothing is sent when you click. You review the message in the chat and are charged only when you send it yourself. You can look around without signing in; you sign in when you send.

Sign up and verify your email to get 7.5 bonus PMC, enough for 7 messages with this model at its base price (bonus valid for 90 days).

Good for

Upload a photo or screenshot and ask what it shows
Everyday questions where you want an answer right away
Polishing short texts and translating

Good to know

Web search costs extra only when turned on. With it off, the model answers from what it knew as of its knowledge cutoff.

Specifications

Provider: OpenAI
Released: May 13, 2024
Input included per message: Up to 1,500 characters (extra input is charged)
Knowledge cutoff: October 2023
Input types: Text, Photos, Files
PDF handling: Reads the page images themselves
Web search: Extra charge when turned on (1)
Reasoning: None
Multiplier: x1

Sources

Provider model documentation (checked 2026-10-15)

Compare with other OpenAI models

Prices are the base price per message (memory on, no attachments or search).

Model	Per message	Reasoning summary	Web search
GPT-4.1	0.75 PMC	No	+1 PMC
GPT-5.2	0.75 PMC	No	+1 PMC
GPT-4o (This model)	1 PMC	No	+1 PMC
GPT-5.1	1 PMC	Shown	+1 PMC
GPT-5.4	1 PMC	No	+1.25 PMC
GPT-6 Sol	1 PMC	Shown	+1 PMC

FAQ

How much does one message cost?: The base price is 1 PMC (KRW 40) per message, shown as x1 in the chat. With previous-conversation memory turned off, it is 0.5 PMC (KRW 20). Anything extra, such as input beyond the included length, attachments or paid web search, is added up and shown on the send button before you send.
Do I need a monthly subscription?: No. There is no monthly subscription: you top up PMC and only what you use is deducted each time you send. 1 PMC is based on KRW 40, and a payment fee is added when you buy PMC (for example, 100 PMC costs KRW 4,476).
Can it search the web?: Yes. If you turn web search on when sending, 1 PMC is added to that message.
Can I upload photos or files?: Yes. You can send photos as well as PDFs and document files. If a file costs extra, the amount is shown on the send button before you send.
Can I see a reasoning summary?: This model answers directly without showing a reasoning summary.
What kind of questions is it good for?: It suits tasks where you want an answer right away, such as everyday questions, polishing short texts or describing what is in a photo. For problems that need several steps of reasoning, also look at the models in the comparison table that show a reasoning summary.
Can I still use GPT-4o?: Yes. You can use it right away with pay-per-message billing, no subscription needed.