GitHub Copilot and OpenAI Codex bring LLMs to programming
Confirmed
Importance: major (4 of 5)The takeaway
GitHub launched Copilot as a technical preview, an AI pair programmer powered by OpenAI Codex, a GPT model fine-tuned on public code; the Codex paper introduced the HumanEval benchmark.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- Major (4 of 5)
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 AstraIn its training data
- Claude Opus 5.5In its training data
- Gemini 4 HydrogenIn its training data
- Grok 4.7In its training data
It happened before the cutoffs of all four assistants, so it can be in their training data.
Key facts
- Copilot technical preview announced 29 June 2021
- Codex paper ‘Evaluating Large Language Models Trained on Code’, arXiv 2107.03374 (July 2021)
- Introduced HumanEval (164 hand-written Python problems)
- Copilot became generally available in June 2022
What happened
Copilot offered inline code completions in editors, generating whole functions from comments and context.
Why it matters
The first mass-market generative AI product for professionals; coding became the flagship LLM use case, leading to coding agents like Claude Code.
Sources
3 sources from 3 sites. Numbers match the chips in the text.
3 sources: 2 primary, 1 reaction
Primary
- Evaluating Large Language Models Trained on Code (arXiv)arxiv.org, paper
- Introducing GitHub Copilot: your AI pair programmer (GitHub Blog)github.blog, official
Reactions
- Wikipedia: GitHub Copiloten.wikipedia.org, discussion
Changes
- Filed