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
Cheapest paid plan: API pay-as-you-go (usage-based)
Development purposes are almost free with rate limits, and the exact RPM/TPM/RPD depends on the account level as stated on aistudio.google.com/rate-limit. For the Gemini 2.5 series, Search grounding is free for 1,500 times/day, and then US$35/1,000 times, while Maps grounding is also free for 1,500 times/day, but then US$25/1,000 times (confirmed on the official website on 2026-07-27 that the excess fee rates for the two are different). Other Search/Maps models are free for 500 times/day. For the Gemini 3 series models, the first 5,000 prompts per month are free (both Search and Maps), and then US$14/1,000 times for queries.
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)
Google AI Studio
Plan
Price
What you get
Pay-as-you-go API
Official quote (upon inquiry)
Billed by token after exceeding the limit
Which one should you pick?
Both offer a free plan. Compare paid tiers against your needs.
Neither publishes paid pricing — check whether the free tier covers your needs.
FAQ
Is there a free version of aider?
Yes. 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
How much does aider cost?
The cheapest is the plan from aider named API cost (self-selected provider), at about Official quote (upon inquiry).
Does aider support Chinese?
aider only partially supports Chinese.
Is there a free version of Google AI Studio?
Yes. Development purposes are almost free with rate limits, and the exact RPM/TPM/RPD depends on the account level as stated on aistudio.google.com/rate-limit. For the Gemini 2.5 series, Search grounding is free for 1,500 times/day, and then US$35/1,000 times, while Maps grounding is also free for 1,500 times/day, but then US$25/1,000 times (confirmed on the official website on 2026-07-27 that the excess fee rates for the two are different). Other Search/Maps models are free for 500 times/day. For the Gemini 3 series models, the first 5,000 prompts per month are free (both Search and Maps), and then US$14/1,000 times for queries.
How much does Google AI Studio cost?
The cheapest is the plan from Google AI Studio named Pay-as-you-go API, at about Official quote (upon inquiry).
Does Google AI Studio support Chinese?
Google AI Studio only partially supports Chinese.
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