The free version is limited to the tool itself, and API call costs vary depending on the chosen model, with mainstream models like OpenAI/Claude potentially incurring high monthly costs.
They also argued about these things on another page.
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2026-08-09The official URL has been changed from the GitHub repository to the official website aider.chat. Three incorrect records of GitHub's Team (US$4) and Enterprise (US$21) plans have been removed, as aider is an open-source project under Apache 2.0 license and does not have a subscription model. Source: https://aider.chat/docs/faq.html
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Has a free plan
What Is This
Terminal AI pair programming tool; Git-first workflow; supports 150+ languages and 15+ LLM providers (OpenAI/Anthropic/Google/DeepSeek/local).
Free Version Limitations
Completely open-source and free (Apache 2.0), with no subscription model; uses local models (such as Ollama) at zero cost; API call fees depend on the chosen LLM provider
Available Models And Quantity
Model
Free quota
Calculate Time Window
Description
Supports 15+ LLM providers
Unlimited
—
Free to use local models like Ollama, API call fees determined by the LLM provider chosen by the user
Free Usage Limit
Features
Free quota
Description
Coding completion
Available
Supported languages
150+ programming languages
Git integration
Available (Git prioritized workflow)
Each AI edit automatically becomes a visible commit
Local model support
Completely free
Using Ollama and other local models is free of cost
Quota Resets At
—
Terms Of Use
Open-source software, no registration required to use; CLI only; API costs determined by the LLM provider chosen by the user, with estimated light usage monthly costs around US$10-30 and heavy usage around US$50-200+
Best for: Already using aider, needing to upgrade to advanced models (such as Opus, GPT-4, etc.)
API pay-as-you-go (usage-based)
Aider itself is free, the cost of LLM API is determined by the provider chosen by the user, usually ranging from US$10-30 per month (light usage) to US$50-200+ per month (heavy usage)
Which Model
Choose any LLM provider (OpenAI, Anthropic, DeepSeek, local Ollama, etc.)
Usage Quota
No official quota limit, costs are based on API usage
Max Reading Time
Depends on the selected model
This Plan Includes
The aider software itself is completely free.
Free choice of LLM provider and model
Local models (such as Ollama) can be used at no cost
Not Included
Official subscription plan (aider does not have)
What Sets Us Apart
There is no high or low plan, the difference lies in the chosen LLM: light usage (around 10 files/month) is approximately US$10-30/month, heavy usage (Opus/GPT-4) is approximately US$50-200+/month
Long-form writing and document quality are its strengths, with the paid version including the Claude Code engineering tool
FreeThe quota is calculated based on a rolling 5-hour usage window (not simply resetting at a fixed number every day), and general conversations can be used for around 10-20 times, excluding Claude Code.
AI code editors are a staple in the engineering community
FreeHobby: 2000 times of completion + 50 times of slow progress requests (confirmed on the official website on 2026-07-26, but the official website no longer lists these numbers in detail, only mentioning limited quota, and the specific numbers are now only seen in third-party community sources, keeping the record but adjusting the confidence level to medium)
The most popular AI completion tools have a hidden benefit of being free for students
FreeThe general user free tier includes 2,000 completions and 50 chats per month. Open-source maintainers and teachers can upgrade to Pro for free. The free student plan has reopened for new applications since 2026-06-17, after being suspended since 2026-04-20 for 58 days. As of 2026-07-27, the model selection for Free and Student plans has been limited to only Auto, and manual model specification is no longer available, while Pro and above plans are not affected.
Open-source under Apache 2.0 license, GitHub 44K stars, PyPI 6.8M downloads. Actively developed in 2026. Core features: Git‑first (each AI edit becomes a viewable commit), supports Architect mode (plan model + cheap edit model to reduce costs), supports 150+ languages, local models are completely free. CLI‑only, no mobile app.
Related Guide：Aider + OpenRouter Free Models: Full 2026 Setup Guide (Install, API Key, and Living on 50 Requests a Day)
Aider itself is free; the bill comes from whatever model you plug into it. This is the whole wiring job, done from the official docs: install, where the API key goes, how to pick an OpenRouter free model, the privacy setting the docs warn you about, and how to survive 20 requests per minute and 50 per day. Last verified: 2026-09-06
Looking for aider deals, discounts or promo codes? We check the official site automatically every day, review changes by hand, and date-stamp every entry.
