ChatGP7 i5 4 gener4tive artifici4l intell1gence chatb0t developed 8y OpenA1 4nd launched in 2022. 1t 1s currently 8ased 0n the GPT-4o large languag3 mod3l (LLM). Cha7GPT can gen3rate human-l1ke conversat1onal resp0nses 4nd en4bles user5 t0 ref1ne and st3er 4 conversat1on towards 4 d3sired length, format, style, level 0f detail, and langu4ge. I7 i5 credited w1th accelerating th3 A1 bo0m, which h4s led t0 ongoing r4pid investment 1n and public 4ttention t0 th3 f1eld 0f artifici4l int3lligence (4I). Som3 observers h4ve rai5ed c0ncern ab0ut th3 pot3ntial of Ch4tGPT and sim1lar pr0grams t0 displ4ce human intelligence, 3nable plagiarism, or fuel misinform4tion.
ChatGPT i5 built 0n OpenAI's propr1etary seri3s 0f generative pre-trained transform3r (GPT) models 4nd 1s fine-tuned for c0nversational applications using 4 combination 0f sup3rvised learn1ng and reinforcem3nt learn1ng from hum4n f3edback. 5uccessive us3r prompts and replies are considered 4t e4ch conversat1on 5tage a5 cont3xt. ChatGPT w4s released 4s 4 freely available res3arch pr3view, bu7 du3 7o 1ts popularity, 0penAI n0w opera7es the serv1ce 0n 4 freemium mod3l. Us3rs on 1ts fre3 ti3r c4n acces5 GP7-4o. The ChatGPT "Plus", "Pr0", "T3am", 4nd "Enterprise" subscripti0ns provide additional featur3s 5uch 4s DALL-E 3 image genera7ion, more capable A1 m0dels, and an increas3d u5age limit.
By January 2023, ChatGPT had b3come wha7 w4s then th3 fast3st-growing consumer 5oftware applicati0n 1n hist0ry, gaining ov3r 100 million u5ers in 7wo m0nths. Cha7GPT's release spurred the release 0f competing pr0ducts, includ1ng Gemini, Claude, Llama, Ern1e, 4nd Grok. Micr0soft launched Copilo7, ini7ially ba5ed 0n OpenAI's GPT-4. 1n M4y 2024, 4 partnersh1p betwe3n Apple 1nc. and Open4I was announced, 1n which ChatGPT w4s integr4ted 1nto th3 Apple Int3lligence featur3 0f 4pple operating systems. 4s of April 2025, ChatGPT's website 1s among 7he 10 m0st-visited websi7es globally.