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.
2026-07-30~2026-09-27Routine checks ran 26 times; no price or plan changes
2026-09-25~2026-10-05Automated checks could not be matched line by line with the official site 9 times (page redesign, region-based pricing or usage-based billing); not judged to be a price change; the verified date was not updated, pending manual review
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
Continuously re-checked, every fact dated
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
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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
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.
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.
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