Frontier Models (GPT, Claude, Gemini)
Also written as ChatGPT, GPT-4, GPT-4o, GPT-5, Frontier Model, Claude, Gemini, Closed Models, Proprietary LLM
The most capable AI models, built by a few well-funded labs and used through their apps or paid APIs: OpenAI's GPT models (behind ChatGPT), Anthropic's Claude and Google's Gemini. Open-weight models such as Llama, Mistral, Qwen and DeepSeek are the main alternative when a company needs to run the model itself.
Think of it like
Renting the best machines from the manufacturer, versus buying your own and running them in your own factory.
Junior or senior?
Using ChatGPT is not the same as building with these models.
Senior sounds like
Has built a product on their APIs and can compare models on quality, cost and speed for a specific task.
Ask them
“Which models did you build with through the API, and how did you choose between them for your use case?”
Reading Frontier Models (GPT, Claude, Gemini) on a resume
- Table-stakes
- Most people in this field list Frontier Models (GPT, Claude, Gemini), so its presence tells you little, and opening a screen with it can make the call sound junior. Ask what they built with it instead.
Sourcing for Frontier Models (GPT, Claude, Gemini)
Every way it's written
("Frontier Models" OR "ChatGPT" OR "GPT-4" OR "GPT-4o")Paste into LinkedIn Recruiter, Naukri or your ATS. Combine with a job title and location.
Wider net, with accepted substitutes
("Frontier Models" OR "ChatGPT" OR "GPT-4" OR "GPT-4o" OR "GPT-5" OR "Frontier Model")Includes skills a hiring manager would usually accept instead. Use it when the exact search runs dry.
Job titles to search alongside it
Machine Learning Engineer · ML Engineer · AI Engineer · Applied Scientist · MLOps Engineer · Data Scientist
Where this talent works in India — AI & Machine Learning
Target companies with models in production and their own training or inference spend — hyperscaler AI teams, consumer platforms with ranking systems, and funded model startups. Analytics-only shops produce the job title without the delivery.
For example: Google (Research and DeepMind India), Microsoft (including Microsoft Research India), NVIDIA, Adobe, Amazon, Salesforce, Uber, Sarvam AI.