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)
The 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.
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)
Claude
Plan
Price
What you get
Pro
US$20 / mo
Annual US$200
Max 5x
US$100 / mo
Max 20x
US$200 / mo
Team Standard
US$25 / user / mo(5 user ≈ US$125/mo)
Per seat, with annual payment discounted to US$20/seat/month; requires a team of 2-150 people
Team Premium
US$125 / user / mo(5 user ≈ US$625/mo)
per seat, yearly payment reduced to US$100/seat/month, 5 times the usage
Enterprise
US$20 / user / mo(5 user ≈ US$100/mo)
The official website has added a new plan (discovered on 2026-07-26, previous data was incomplete): starting at $ per seat/month, only annual payment is available, with additional usage fees; includes SCIM, audit logs, and optional HIPAA compliance.
Which one should you pick?
Both offer a free plan. Compare paid tiers against your needs.
aider has no public paid plan; Claude starts at about US$20 / mo.
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 Claude?
Yes. The 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.
How much does Claude cost?
The cheapest is the plan from Claude named Pro, at about US$20 / mo.
Does Claude support Chinese?
Claude offers full Chinese interface support.
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