Aider
Open-source pair programming in the terminal.
Aider is an open-source terminal tool for working with language models on an existing codebase. It builds a repository map, edits files, integrates with Git, and can run linting and tests.
Overview
Aider runs from the command line and can connect to cloud or local language models. Its workflow is centered on repository-aware editing and Git-based change tracking.
Tool details
- Platforms
- Cli
- Access
- Cli
- Launched
- —
- Open source
- Yes
- Pricing
- Free
- Categories
- AI Coding, Open-source Coding Agents, Terminal Coding Agents
Features
Aider is open source. Model or provider charges may still apply.
Selectable or integrated models
These are documented as selectable or accessible, not necessarily the product's default models.
Claude Sonnet 5.5
Claude Sonnet 5.5 is an Anthropic model released in September 2026 with a one-million-token context window, text and image input, and text output.
Gemini 3.8 Flash
Gemini 3.8 Flash is a Google model for long-horizon software engineering, agent workflows, and multimodal tasks, available through the Gemini API.
GPT-6.1 Sol
GPT-6.1 Sol is an OpenAI model positioned below Astra on price while retaining support for complex coding, computer use, reasoning, and tool-based workflows.
API integrations
Claude API
Claude API is Anthropic's REST API for programmatic access to Claude models, including Messages, streaming, tool use, files, model listing, and related platform features.
DeepSeek API
DeepSeek API provides access to the current DeepSeek V4 models through OpenAI-compatible and Anthropic-compatible interfaces.
Gemini API
Gemini API provides programmatic access to Google's Gemini and related generative models through standard, streaming, real-time, batch, embeddings, and media endpoints.
Groq API
Groq API is an OpenAI-compatible inference API for supported language and audio models, with Responses, Chat Completions, streaming, tool use, structured output, and speech endpoints.
Mistral API
Mistral API provides programmatic access to Mistral models, chat completions, agents, tool use, structured outputs, embeddings, document workflows, and batch processing.
OpenAI API
OpenAI API provides programmatic access to OpenAI models through the Responses API, Realtime API, batch processing, and other model and media endpoints.
OpenRouter API
OpenRouter API is an OpenAI-compatible model-routing API that exposes hundreds of models from many providers through a single endpoint and account.
xAI API
xAI API provides programmatic access to Grok models through OpenAI-compatible REST endpoints and xAI's gRPC interface, with text, tool, media, file, and batch APIs.