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Free and Ultra-Cheap AI Coding Plans: Zero-Cost Options for Developers

Cowrie
Cowrie
Dev @ Bswen

I was staring at my monthly AI tool subscriptions: ChatGPT Plus at $20/month, Claude Pro at $20/month, and various API costs piling up. That’s over $40/month just for AI assistance. I needed to find a cheaper way—or ideally, free options.

The Expensive Reality

AI coding assistance has become essential for my workflow, but the costs add up fast. Pay-per-token API pricing is unpredictable, and subscription fees are a fixed monthly drain. When you’re a solo developer or just starting out, these costs can be a real barrier.

I started hunting for genuinely free or ultra-cheap alternatives. After days of research and testing, I found three viable paths that actually work.

Path 1: The Limited Free Tier (Act Fast!)

China Unicom Cloud currently offers free Coding Plans—but here’s the catch: only about 12,000 slots are available. This is a legitimate limited-time promotion, not a scam.

China Unicom Cloud Free Tiers
+------------------+---------+----------------------------------+---------------+
| Plan             | Price   | Models Available                 | Quota/Month   |
+------------------+---------+----------------------------------+---------------+
| Lite (Free)      | ¥0      | GLM-5, MiniMax M2.5, Qwen        | 18,000 req    |
| Pro (Free)       | ¥0      | GLM-5, MiniMax M2.5, Qwen        | 90,000 req    |
+------------------+---------+----------------------------------+---------------+


Requirements:
- China mobile number (Unicom preferred but not required)
- Quick action—slots fill fast
- One account per person

I checked their site and the Lite tier offers access to decent models like GLM-5, MiniMax M2.5, and Qwen. The Pro tier bumps you to 90,000 requests per month—enough for heavy daily use.

The catch? You need to act quickly when slots are available. This isn’t a permanent offering.

Path 2: Free IDE Plugins (Permanent)

If you just need AI assistance within your IDE and don’t care about using external tools like Cursor or Windsurf, several vendors offer permanently free tiers:

Free IDE Plugin Comparison
+------------------+---------+------------------+------------------+
| Plugin           | Price   | Models           | Limitation       |
+------------------+---------+------------------+------------------+
| Tongyi Lingma    | ¥0      | Qwen series      | IDE only         |
|                  |         |                  | (VS Code,       |
|                  |         |                  | JetBrains)       |
+------------------+---------+------------------+------------------+
| Baidu Comate     | ¥0      | ERNIE models     | IDE only         |
|                  |         |                  | Limited quota    |
+------------------+---------+------------------+------------------+
| Tencent CodeBuddy| ¥0      | Hunyuan          | 250 credits per  |
|                  |         |                  | 2 weeks          |
+------------------+---------+------------------+------------------+

Tongyi Lingma from Alibaba is the most generous here. The basic tier is permanently free, and they occasionally offer free Pro tier access (normally ¥59/month). I installed it in VS Code—it works well for code completion and explanation, but you’re locked into their IDE plugin.

The limitation became clear when I tried to use Cursor: the plugin doesn’t provide API access, so you can’t use it with external AI coding tools.

Path 3: The ¥29/month API Plan (Guaranteed Access)

For guaranteed API access at minimum cost, MiniMax offers a Starter plan at just ¥29/month. That’s less than ¥1 per day.

MiniMax Starter Plan Details
Price: ¥29/month (≈ $4/month)


Models Included:
- MiniMax M2.5 (latest)
- MiniMax M2.1
- MiniMax M2


Rate Limits:
- 40 prompts per 5 hours
- Enough for moderate daily use


Compatibility:
- Cursor ✓
- Windsurf ✓
- Cline ✓
- Any OpenAI-compatible tool ✓

I tested this with Cursor and it worked immediately. The setup was straightforward—just plug in the API endpoint and key.

Common Mistakes to Avoid

Mistake 1: Relying Only on Free IDE Plugins

I initially thought free IDE plugins would be enough. The problem: they only work within specific editors. If you want to use Cursor, Windsurf, or other AI-native editors, you need API access—not just a plugin.

Plugin-only approach limitations:
- Can't use Cursor's advanced features
- No Windsurf integration
- Limited model selection
- No custom AI workflows


API approach advantages:
- Works with any AI coding tool
- Full model access
- Flexible integration
- Future-proof

Mistake 2: Waiting Too Long on Limited Free Offers

China Unicom’s free tier has ~12,000 slots. By the time I decided to sign up, I had to check multiple times before finding an available slot. If you see it available, grab it immediately.

Mistake 3: Ignoring the Free Tier Rate Limits

Free isn’t always enough. Tongyi Lingma’s free tier has rate limits. Tencent CodeBuddy gives only 250 credits every two weeks. If you code 8+ hours daily, you’ll hit walls.

Decision Matrix

Which Option Should You Choose?
                    +------------------------+
                    |   How much can you    |
                    |   spend monthly?      |
                    +------------------------+
                              |
              +---------------+---------------+
              |                               |
         ¥0 (free)                      ¥1-50 (ultra-cheap)
              |                               |
    +---------+---------+           +---------+---------+
    |                   |           |                   |
Need external     IDE-only     Need reliable      Occasional
AI tools?         is fine?      API access?       use only
    |                   |           |                   |
    v                   v           v                   v
China Unicom      Tongyi Lingma  MiniMax Starter   Free IDE
Free Tier         (permanent)    ¥29/month         plugins
(act fast)                       (best value)

My Recommendation

For developers serious about AI-assisted coding:

  1. Immediately check China Unicom Cloud’s free tier availability—if slots are open, grab one
  2. Install Tongyi Lingma as a backup—it’s permanently free and works well within IDEs
  3. If you need reliable API access, MiniMax Starter at ¥29/month is unbeatable value

¥29/month is cheaper than a single ChatGPT Plus subscription while giving you API access to competitive models. That’s the price of one coffee per month for professional AI coding assistance.

Final Thoughts

The AI coding landscape is maturing, and competitive pressure is driving prices down. Free options exist, but they come with trade-offs: limited availability, IDE lock-in, or rate limits.

The good news? You can start free and upgrade only when needed. Don’t pay $20+/month unless you genuinely need those premium features.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!

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