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Top GPT API freelancers

123 freelancers list GPT API on Upwork.

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Showing 50 of 123Data updated Nov 7

#
Freelancer
Since
1
Bjorn L.
Top Rated Plus
Bjorn L. 🇸🇬

AI Engineer, 2X Startup CEO | Built 7-digit sales | Ex-Google portco

$12k↓ 6%Apr 2025
2
Donald M.
Top Rated Plus
Donald M. 🇨🇦

Senior AI ML Consultant | Fractional CTO | Architect | Engineer

$8k↑ 5%Aug 2019
3
Dmytro M.
Top Rated Plus
Dmytro M. 🇺🇦

AI & WordPress Developer | GPT-5 | Claude | n8n | PHP | WooCommerce

$5k↑ 12%Jul 2019
4
Rohit C.
Top Rated Plus
Rohit C. 🇮🇳

Senior .NET & AI Engineer | Healthcare, HL7, FHIR & EHR/EMR

$3k↑ 10%Dec 2015
5
Dollar S.
Top Rated Plus
Dollar S. 🇮🇳

Fullstack Developer | PHP/Wordpress, AI, Node.js, React, Python |

≈$3k–Jul 2021
6
Christopher B.
Rising Talent
Christopher B. 🇺🇸 New

AI Developer & Business Process Automation | AI Agents, n8n, Claude

$2k–Oct 2026
7
Jason L.
Expert-Vetted
Jason L. 🇺🇸

Full-stack AI Agent Engineer

$2k↓ 19%Apr 2008
8
Turab Ali K.
Top Rated Plus
Turab Ali K. 🇵🇰

AI Engineer | Voice Agents | RAG | LLM | OpenAI GPT | Agentic Chatbots

$2k↓ 19%Jun 2024
9
Leopoldo H.
Top Rated
Leopoldo H. 🇺🇾

Amazon SP-API & Ads API Expert | MCP, Data Engineering, Automation

$1k↑ 15%Jan 2023
10
Dilpreet S.
Top Rated Plus
Dilpreet S. 🇮🇳

Expert Mobile App Developer (iOS, Flutter, Swift, Objective-C, Dart)

$1k↓ 28%May 2025
FreelancerMRRMember since
11
Dilpreet S.
Top Rated Plus
Dilpreet S. 🇮🇳

Expert Mobile App Developer (iOS, Flutter, Swift, Objective-C, Dart)

$1k↓ 28%May 2025
12
Tony S.
Expert-Vetted
Tony S. 🇮🇩

Expert-Vetted AI Systems Engineer | LLM Agents, RAG, API Automation

$994↓ 54%Jan 2015
13
Taras L.
Top Rated
Taras L. 🇸🇰

Automation Architect | n8n, GHL, CRM | AI Agents | Lead Pipelines

$772↑ 4%Mar 2023
14
An L.
An L. 🇻🇳

Fullstack Developer | LLM | AI Agent | Chatbot | AI Automations

$674↑ 11%Sep 2024
15
Anastasiia S.
Anastasiia S. 🇺🇦 New

Backend developer | Python Developer | Web Developer

$573↓ 24%Mar 2026
16
Justin M.
Justin M. 🇷🇴

AI + CRM Automation (n8n/Make/Zapier) | API Integrations | Lead Gen

$478↓ 10%May 2022
17
Petro O.
Top Rated
Petro O. 🇺🇦

SwiftUI | iOS Developer| GCP | Firebase | Golang

≈$347–Aug 2022
18
Aghiles M.
Aghiles M. 🇫🇷

Data Analysis & Machine Learning

$314↓ 5%Feb 2026
19
Matthias V.
Matthias V. 🇧🇪

Python & AI Developer | LLM Apps, Generative AI & Backends

$279↓ 1%Jan 2013
20
Shoaib T.
Top Rated
Shoaib T. 🇵🇰

Full Stack AI Engineer | AI Agent, Retell | Chatbot, RAG, Voice Agents

$257↑ 31%May 2024
FreelancerMRRMember since
21
Kamalpreet S.
Top Rated
Kamalpreet S. 🇮🇳

Senior Full Stack Developer

$210↑ 43%Mar 2017
22
Hom S.
Top Rated
Hom S. 🇮🇳

Laravel & PHP Developer | CRM, POS, SaaS & AI Automation | Python

$208↑ 35%May 2021
23
Dimi P.
Top Rated
Dimi P. 🇬🇷

API Integration & Google Sheets Automation Expert | API Integration

$196↓ 41%Mar 2013
24
Saeed H.
Top Rated
Saeed H. 🇵🇰

AI Engineer | LangGraphI | Agenctic, RAG, Langchain Full-Stack MERN

$181↓ 48%Feb 2022
25
JIAQI T.
JIAQI T. 🇨🇳

Full Stack Senior Developer in both Software and Game (15 years+)

$171↓ 1%Jun 2023
26
Kokandeep S.
Top Rated Plus
Kokandeep S. 🇮🇳

Senior Python - AI/ML/Automation/Agentic AI Engineer

$144↓ 53%Jan 2022
27
Deepali K.
Top Rated
Deepali K. 🇮🇳

AI SaaS Developer | MVP, Web & Mobile App Development

$97↓ 46%Dec 2024
28
OMAR A.
OMAR A. 🇯🇴

Top Rated | Full Stack web Developer | Next.js, React, Shadcn, Laravel

$82↓ 26%Oct 2022
29
Josip V.
Josip V. 🇭🇷

Senior AI Engineer (MD PhD, Msc) | RAG, LLM Agents, Fine-tuning | GCP

$61↓ 1%Aug 2022
30
Mirza Nouman B.
Mirza Nouman B. 🇵🇰

Full-Stack Developer | Python/ Django, FastAPI, LLM, API Integration

≈$47–Dec 2016
FreelancerMRRMember since
31
Hassaan P.
Hassaan P. 🇵🇰

AI/ML Engineer & Automation Consultant | Build Smarter Workflows w/ AI

$40↓ 82%Jul 2025
32
Usman I.
Usman I. 🇵🇰

Full Stack Web Developer

$34↑ 40%Sep 2013
33
Jaspreet S.
Jaspreet S. 🇮🇳

Mobile & Web Development - Android | iOS | Node / React Native | AI

$29↓ 1%Apr 2018
34
Mohit k.
Mohit k. 🇮🇳

Senior Backend Engineer | Node.js, AWS, Kafka | AI-Integrated Systems

$28↓ 59%Oct 2013
35
Valentin M.
Valentin M. 🇦🇷

Market Researcher

$27↓ 16%Mar 2024
36
Stan Z.
Top Rated
Stan Z. 🇺🇦

Data Automation and Integration Architect

$27↓ 28%Sep 2020
37
Catherine R.
Catherine R. 🇵🇭

Shopify, E-Commerce Dispute/Chargeback Manager, CSM, Backend Manager,

$25↓ 1%Jan 2019
38
Monday U.
Monday U. 🇳🇬

Mobile App Development | Flutter | Flutterflow | React Native Firebase

≈$17–Jun 2024
39
Nida R.
Nida R. 🇵🇰

Experienced WordPress Dev & Designer| Elementor & DIVI API integration

$16↓ 1%Apr 2019
40
Rijyel S.
Top Rated
Rijyel S. 🇵🇭

Web Developer | LLM & Machine Learning Engineer | Automation

$5↓ 80%Jul 2025
FreelancerMRRMember since
41
Maryam K.
Maryam K. 🇵🇰

AI Engineer/ Full stack developer

$3↓ 95%Mar 2023
42
Amar Nath S.
Amar Nath S. 🇮🇳

Expert in GenAI, Deep learning with Pytorch and Robotics

$1↓ 1%Feb 2023
43
Hans Georg Martin W.
Hans Georg Martin W. 🇩🇪

SEO Copywriter

$1↓ 1%Aug 2022
44
Maksim S.
Maksim S. 🇵🇱

FastAPI | React | Web Development with 3+ year experience

$0–Dec 2022
45
Fayzan A.
Fayzan A. 🇵🇰

AI Engineer | Automation | App Script | LLM | RAG | AI Agents |

$0↓ 100%Jul 2024
46
Ekunola S.
Rising Talent
Ekunola S. 🇳🇬

AI developer | Voice AI Agent | Vapi AI | Retell AI| N8N

$0–Jul 2022
47
Arpit G.
Top Rated
Arpit G. 🇮🇳

AI Engineer | Generative AI, LLM Apps, AI Agents, Automation, Chatbots

$0↓ 100%May 2021
48
Jan W.
Jan W. 🇵🇱

AI & Machine Learning Specialist | Deep Learning | Custom AI Solutions

$0–Nov 2022
49
Ahmed  H.
Ahmed  H. 🇪🇬

BIM Automation | Revit API | ACC API | Navisworks API | Forge API

$0–Nov 2023
50
Daniel F.
Daniel F. 🇳🇬

AI SaaS & Automation | React, Nextjs & AI APIs (GPT, DALLE, Whisper)

$0–Sep 2019
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