AiderVS
Gemini CLI
Read from each vendor’s own pages last night, so it does not go stale the way a written comparison does.
- AIDER
- Free
- GEMINI CLI
- Not read
- CHANGES ON EITHER
- 3
- CAVEATS
- 1
GEMINI CLISUNSET SINCE 18 JUNE 2026Gemini CLI has had an access tier withdrawn; check what is still available before choosing it. Free consumer access ended 18 June 2026; users were directed to Google Antigravity. The tool still exists for API-key and paid use, so this is a withdrawn access tier rather than a shutdown, a distinction almost every ranked page gets wrong.
On the prices each vendor publishes about itself, Aider starts at Free and Gemini CLI at Not read. Before that decides anything: Gemini CLI has had an access tier withdrawn; check what is still available before choosing it. (since 18 June 2026) Both take your own API key, so on either one the subscription and the model bill are separate decisions. Both are open source, so neither can withdraw the thing you have already installed. Every figure on this page was read from the two vendors' own pages in last night's run rather than written down once, which is the only reason it is still the current answer. ToolDrift sells neither and takes no referral fee on either.
| COMPARED ON | AIDER | GEMINI CLI |
|---|---|---|
| ASSERTED · WHAT EACH VENDOR PUBLISHES ABOUT ITSELF | ||
| Category | CLI agent | CLI agent |
| Vendor | Aider AI | |
| Status | Active | Sunset |
| How it charges | Free | Usage |
| Entry price | Free | Not read |
| Default model | None, you choose | google/gemini |
| Your own key | Yes | Yes |
| Source | Open source · Apache-2.0 | Open source · Apache-2.0 |
| Plans | No named tier on Aider AI's pricing page could be read with a price beside it. | No named tier on Google's pricing page could be read with a price beside it. |
| MEASURED · COUNTED ON THE LAST NIGHTLY RUN | ||
| Stars | 49.2K | 107.2K |
| Maintenance | 55/100 | 100/100 |
| Days since last push | 125 | 0 |
| Top model in it | Thinking Machines: Inkling (free) · Free | not measured |
| Its volume | 10B tokens | not measured |
Is Aider or Gemini CLI cheaper?
On the cheapest option each vendor publishes: Aider is Free and Gemini CLI is Not read. Treat both as an allowance rather than a bill, every tool in this category meters model usage on top of the plan, and which one costs more in practice depends on the models you drive and how hard. The tier prices are the part that can be checked from outside, so they are the part this page prints.
Can I use my own API key with Aider or Gemini CLI?
Aider: yes. Gemini CLI: yes. It is the row that decides whether the subscription price is most of what you pay or a fraction of it: a tool that takes your own key charges for the software, and one that does not is reselling inference with a margin you cannot see.
Are Aider and Gemini CLI still maintained?
Active and Sunset as of last night's read. Aider's repository was last pushed 125 days ago and it scores 55/100 on maintenance; Gemini CLI's repository was last pushed 0 days ago and it scores 100/100 on maintenance. One caution: Gemini CLI has had an access tier withdrawn; check what is still available before choosing it. (since 18 June 2026) This is the question a written comparison cannot answer, because it was true on the day it was published and nobody went back.