GPT-5 API Cost Calculator

OpenAI's GPT-5: $1.25/M input · $10/M output · $0.125/M cached input. Price your own workload below.

Presets:

What GPT-5 costs in practice

WorkloadInputOutputCost
Short chat message500250$0.0031
10-page document + summary7,000500$0.014
Agent / coding session50,00010,000$0.163
1M tokens in + 1M out1,000,0001,000,000$11.25

GPT-5 vs nearest rivals

Closest-priced alternatives on a mixed 10K-input / 2K-output request:

ModelInput $/MTokOutput $/MTokMixed request
GPT-5$1.25$10$0.033
Gemini 3.6 Flash$1.5$7.5$0.030
Mistral Medium 3.5$1.5$7.5$0.030
Gemini 2.5 Pro$1.25$10$0.033

Frequently asked questions

How much does the GPT-5 API cost?

GPT-5 costs $1.25 per million input tokens and $10 per million output tokens, with cached input at $0.125 per million (90% off).

How much does a typical chat message cost with GPT-5?

A short chat message (about 500 input and 250 output tokens) costs roughly $0.0031 with GPT-5. At 1,000 such requests a day, that is about $93.75 per month.

Is GPT-5 cheap compared to similar models?

GPT-5 has the #13 cheapest input rate of the 26 models we track. On a mixed workload (10K input / 2K output), it costs $0.033 per request, versus $0.030 for Gemini 3.6 Flash.

Related

Compare all models at once ·Count tokens in your prompt

Last updated 2026-08-03. Prices verified againstOpenAI's official pricing page; see themethodology.