5
Coding
Its home turf: completions, chat, refactoring, tests and agent mode.
GitHub Copilot: what it is and what it is best at
The AI pair programmer built into editors, the command line and GitHub itself.
The short version
At a glance
Made byGitHub
CategoryBuild & code
Strongest atcoding, ease of use, agents & automation
NameA copilot sits beside the pilot: it assists the developer rather than replacing them.
Overview
What GitHub Copilot is
GitHub Copilot suggests code, answers questions about a codebase, reviews pull requests and, in agent mode, carries out multi-file tasks inside the developer's editor.
It lets teams choose from models by several providers, which makes it a convenient way to compare them on real code.
Current models. GitHub adds models from multiple labs; its changelog and press describe Gemini 3.8 Flash and Claude Fable 5.1 arriving in September 2026, plus agent workflow features in VS Code.
Where it is strong
Capability profile
Scores are Halden’s editorial view of typical fit on a 0–5 scale. They are not benchmark results and will differ by task, model version and plan: test on your own work.
Coding, analytics, documents, research
How it performs by task
3
Analysis & analytics
Helpful for writing queries and data scripts.
3
Documentation & writing
Good at README, comments and docstrings.
2
Research
Useful for understanding unfamiliar code.
Practical tips
Get more from GitHub Copilot
- Use it for tests and boilerplate first.
- Keep code review and CI in place for AI-written changes.
- Set content exclusions for sensitive repositories.
Watch-outs
- Generated code can contain bugs or licence issues: review it.
- Model choices and premium request limits vary by plan.
What has changed recently
Latest news and releases
- Gemini 3.8 Flash and Claude Fable 5.1 come to Copilot
Reports say new models reached paid tiers, and GitHub's changelog confirms Gemini 3.8 Flash availability.
Source: GitHub Changelog - Agent workflows expand in VS Code
Coverage describes scheduled automations and agent merge features, labelled preview.
Source: SessionWatcher
Compiled on October 9, 2026 from public reporting, much of it secondary. Dates, names and specifications can change, so confirm on GitHub Copilot’s own site before you rely on them.
Go deeper
How-to guides for GitHub Copilot and similar tools
September 29, 2026 · 3 min readA review discipline for AI-written code (Cursor, GitHub Copilot and others)AI makes it cheap to produce code, so review and testing become the bottleneck and the safeguard. Here is a lightweight discipline that scales.September 25, 2026 · 3 min readAI for coding: from autocomplete to agentsCoding assistance now spans autocomplete, chat, review and autonomous agents. Knowing which to use when avoids wasted effort and avoidable risk.October 5, 2026 · 3 min readA careful first week with an AI coding agentAgentic coding tools can read a repository, plan a change and edit files. A deliberate first week builds trust and avoids the common mistakes.
Keep exploring
Compare with other tools
FAQ
GitHub Copilot: common questions
What is GitHub Copilot?
An AI coding assistant integrated into editors and GitHub.
Does it write secure code?
Not automatically: use review, testing and security scanning.
Can we choose the model?
Yes, on supported plans you can choose among several providers' models.
A next step
Choose tools on evidence from your own work.
Run a short pilot with the people who will use GitHub Copilot, measure the result, and decide with data, not hype.