ChatGPT [deprecated] vs GitHub Copilot Chat
Side-by-side comparison to help you choose.
| Feature | ChatGPT [deprecated] | GitHub Copilot Chat |
|---|---|---|
| Type | Extension | Extension |
| UnfragileRank | 43/100 | 40/100 |
| Adoption | 1 | 1 |
| Quality | 0 | 0 |
| Ecosystem | 0 | 0 |
| Match Graph | 0 | 0 |
| Pricing | Free | Paid |
| Capabilities | 8 decomposed | 15 decomposed |
| Times Matched | 0 | 0 |
Provides a persistent sidebar panel within VS Code where users can compose arbitrary prompts and receive streaming responses from OpenAI's API. The extension maintains conversation history within the session, allows editing and resending previous prompts, and automatically handles response continuation when API responses are truncated, combining fragmented outputs into coherent answers without user intervention.
Unique: Implements automatic response continuation logic that detects and combines truncated API responses without user action, reducing friction in handling partial code outputs — a pattern not standard in most VS Code AI extensions which require manual prompt re-submission
vs alternatives: Simpler and more lightweight than GitHub Copilot for exploratory conversations, but lacks Copilot's codebase-aware context indexing and inline completion capabilities
Enables users to generate new files or code blocks directly from AI suggestions via a single-click action in the sidebar. The extension parses AI-generated code responses and provides a clickable interface to create files in the project workspace or insert code into the current editor, bypassing manual copy-paste workflows.
Unique: Provides direct file creation from AI responses without intermediate copy-paste, reducing context switching — implemented as a simple click handler that parses sidebar response text and invokes VS Code's file creation APIs
vs alternatives: More direct than Copilot's inline suggestions for file scaffolding, but less intelligent about project structure and dependencies than specialized code generators like Plop or Yeoman
Allows users to select code in the editor, send it to ChatGPT with a fix/modify request, and receive suggestions that can be applied back to the editor. The extension integrates with VS Code's selection API to capture highlighted code, passes it as context to the AI, and provides mechanisms to replace or insert the modified code directly into the file.
Unique: Integrates with VS Code's selection API to capture highlighted code as implicit context, reducing the need for explicit copy-paste — a pattern that leverages VS Code's native editor capabilities rather than requiring custom context management
vs alternatives: More flexible than Copilot's inline suggestions for arbitrary refactoring, but less context-aware than dedicated refactoring tools like Jetbrains IDEs which understand project structure and type information
Allows users to select between multiple OpenAI models (GPT-4, GPT-3.5, GPT-3, Codex) via extension settings, with all requests routed directly to OpenAI's API using a user-provided API key. The extension abstracts model selection into a configuration option, enabling users to switch models without code changes and manage API costs by choosing appropriate model tiers.
Unique: Provides direct model selection without abstraction layers, allowing users to manage API costs and capabilities directly — implemented as a simple configuration option that maps to OpenAI API model parameters
vs alternatives: More transparent about model selection than Copilot (which abstracts model choice), but less sophisticated than multi-model frameworks like LangChain which provide automatic model selection and fallback logic
Captures the entire conversation history from a session and exports it to a markdown file, preserving prompts, responses, and formatting. The export includes timestamps or conversation order, enabling users to archive discussions, share them with team members, or reference them later outside the IDE.
Unique: Provides simple markdown export without complex formatting or metadata — a lightweight approach that prioritizes portability and readability over structured data capture
vs alternatives: More portable than Copilot's inline suggestions (which are not easily exported), but less structured than dedicated conversation management tools like Slack or Notion which provide search, tagging, and collaboration features
Enables users to define custom prompt prefixes that are automatically prepended to user queries before sending to the API. This allows users to establish consistent context, tone, or instructions (e.g., 'You are a TypeScript expert') without repeating them in every prompt, reducing prompt engineering overhead and improving response consistency.
Unique: Implements simple string prepending to prompts, allowing users to inject context without modifying every query — a lightweight approach that trades sophistication for ease of use
vs alternatives: More flexible than Copilot's fixed system prompts, but less powerful than frameworks like LangChain or Prompt Engineering tools which support dynamic context injection and prompt templates
Streams responses from OpenAI's API in real-time to the sidebar, displaying partial results as they arrive. Users can interrupt streaming at any time to stop token consumption, and the extension provides a 'stop response' action to halt further API calls and preserve remaining token quota.
Unique: Provides manual token-aware interruption via 'stop response' action, giving users explicit control over API costs — a pattern that prioritizes cost transparency over convenience
vs alternatives: More cost-conscious than Copilot's always-complete responses, but less sophisticated than frameworks with automatic token budgeting and cost estimation
Maintains a history of all prompts sent during a session and allows users to select, edit, and resend previous prompts without retyping them. This enables iterative refinement of queries, A/B testing different prompt variations, and quick re-execution of similar requests with minor modifications.
Unique: Stores and allows editing of previous prompts within the sidebar UI, reducing friction in prompt iteration — a simple pattern that leverages VS Code's text editing capabilities
vs alternatives: More convenient than retyping prompts from scratch, but less sophisticated than dedicated prompt management tools like PromptBase or Hugging Face which provide version control and sharing
Processes natural language questions about code within a sidebar chat interface, leveraging the currently open file and project context to provide explanations, suggestions, and code analysis. The system maintains conversation history within a session and can reference multiple files in the workspace, enabling developers to ask follow-up questions about implementation details, architectural patterns, or debugging strategies without leaving the editor.
Unique: Integrates directly into VS Code sidebar with access to editor state (current file, cursor position, selection), allowing questions to reference visible code without explicit copy-paste, and maintains session-scoped conversation history for follow-up questions within the same context window.
vs alternatives: Faster context injection than web-based ChatGPT because it automatically captures editor state without manual context copying, and maintains conversation continuity within the IDE workflow.
Triggered via Ctrl+I (Windows/Linux) or Cmd+I (macOS), this capability opens an inline editor within the current file where developers can describe desired code changes in natural language. The system generates code modifications, inserts them at the cursor position, and allows accept/reject workflows via Tab key acceptance or explicit dismissal. Operates on the current file context and understands surrounding code structure for coherent insertions.
Unique: Uses VS Code's inline suggestion UI (similar to native IntelliSense) to present generated code with Tab-key acceptance, avoiding context-switching to a separate chat window and enabling rapid accept/reject cycles within the editing flow.
vs alternatives: Faster than Copilot's sidebar chat for single-file edits because it keeps focus in the editor and uses native VS Code suggestion rendering, avoiding round-trip latency to chat interface.
ChatGPT [deprecated] scores higher at 43/100 vs GitHub Copilot Chat at 40/100. ChatGPT [deprecated] leads on adoption and ecosystem, while GitHub Copilot Chat is stronger on quality. ChatGPT [deprecated] also has a free tier, making it more accessible.
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Copilot can generate unit tests, integration tests, and test cases based on code analysis and developer requests. The system understands test frameworks (Jest, pytest, JUnit, etc.) and generates tests that cover common scenarios, edge cases, and error conditions. Tests are generated in the appropriate format for the project's test framework and can be validated by running them against the generated or existing code.
Unique: Generates tests that are immediately executable and can be validated against actual code, treating test generation as a code generation task that produces runnable artifacts rather than just templates.
vs alternatives: More practical than template-based test generation because generated tests are immediately runnable; more comprehensive than manual test writing because agents can systematically identify edge cases and error conditions.
When developers encounter errors or bugs, they can describe the problem or paste error messages into the chat, and Copilot analyzes the error, identifies root causes, and generates fixes. The system understands stack traces, error messages, and code context to diagnose issues and suggest corrections. For autonomous agents, this integrates with test execution — when tests fail, agents analyze the failure and automatically generate fixes.
Unique: Integrates error analysis into the code generation pipeline, treating error messages as executable specifications for what needs to be fixed, and for autonomous agents, closes the loop by re-running tests to validate fixes.
vs alternatives: Faster than manual debugging because it analyzes errors automatically; more reliable than generic web searches because it understands project context and can suggest fixes tailored to the specific codebase.
Copilot can refactor code to improve structure, readability, and adherence to design patterns. The system understands architectural patterns, design principles, and code smells, and can suggest refactorings that improve code quality without changing behavior. For multi-file refactoring, agents can update multiple files simultaneously while ensuring tests continue to pass, enabling large-scale architectural improvements.
Unique: Combines code generation with architectural understanding, enabling refactorings that improve structure and design patterns while maintaining behavior, and for multi-file refactoring, validates changes against test suites to ensure correctness.
vs alternatives: More comprehensive than IDE refactoring tools because it understands design patterns and architectural principles; safer than manual refactoring because it can validate against tests and understand cross-file dependencies.
Copilot Chat supports running multiple agent sessions in parallel, with a central session management UI that allows developers to track, switch between, and manage multiple concurrent tasks. Each session maintains its own conversation history and execution context, enabling developers to work on multiple features or refactoring tasks simultaneously without context loss. Sessions can be paused, resumed, or terminated independently.
Unique: Implements a session-based architecture where multiple agents can execute in parallel with independent context and conversation history, enabling developers to manage multiple concurrent development tasks without context loss or interference.
vs alternatives: More efficient than sequential task execution because agents can work in parallel; more manageable than separate tool instances because sessions are unified in a single UI with shared project context.
Copilot CLI enables running agents in the background outside of VS Code, allowing long-running tasks (like multi-file refactoring or feature implementation) to execute without blocking the editor. Results can be reviewed and integrated back into the project, enabling developers to continue editing while agents work asynchronously. This decouples agent execution from the IDE, enabling more flexible workflows.
Unique: Decouples agent execution from the IDE by providing a CLI interface for background execution, enabling long-running tasks to proceed without blocking the editor and allowing results to be integrated asynchronously.
vs alternatives: More flexible than IDE-only execution because agents can run independently; enables longer-running tasks that would be impractical in the editor due to responsiveness constraints.
Provides real-time inline code suggestions as developers type, displaying predicted code completions in light gray text that can be accepted with Tab key. The system learns from context (current file, surrounding code, project patterns) to predict not just the next line but the next logical edit, enabling developers to accept multi-line suggestions or dismiss and continue typing. Operates continuously without explicit invocation.
Unique: Predicts multi-line code blocks and next logical edits rather than single-token completions, using project-wide context to understand developer intent and suggest semantically coherent continuations that match established patterns.
vs alternatives: More contextually aware than traditional IntelliSense because it understands code semantics and project patterns, not just syntax; faster than manual typing for common patterns but requires Tab-key acceptance discipline to avoid unintended insertions.
+7 more capabilities