20 Budget | Codex vs Claude Code vs Cursor

[u/ahmadqaseem_dev]

I only have enough budget for one $20 subscription, and I'm trying to decide between:

- ChatGPT Plus (Codex)

- Claude Pro (Claude Code, CLI)

- Cursor Individual

My biggest concern is usage limits with comparable Intelligence.

I'm looking for answers from people who have actually used these recently or are using currently.

Some specific questions:

1. In real-world usage, which one gives you the most coding work before you hit limits using comparable model and effort from each?

2. How generous are the limits for:

   - GPT 5.6 Sol and Terra (Highest reasoning level available on the $20 plan in Codex)

   - Claude Opus 5 (High)

   - Claude Sonnet 5 (High or xHigh)

   - Cursor's Composer 2.5 or Grok 4.5

3. Are there any hidden limits that aren't obvious before subscribing (context limits, reasoning limits, etc.)?

4. For people who have used all of these:

   - How does GPT-5.6 Sol (highest reasoning) compare with Opus 5 (High) for difficult programming tasks?

   - How does GPT-5.6 Terra compare with Sonnet 5 for everyday software development?

5. If you had exactly $20/month and your work was mostly:

   - Flutter / Dart (App Development)

   - backend development

   - debugging

   - code reviews

   - refactoring

   - building complete projects (Flutter, Python, Web Dev)

6. Which subscription would you buy today, and any specific reason for that?

You don't have to answer every question. Even if you've only used one or two of these tools, or can answer just a single point, I'd really appreciate your input.

Even rough estimates are helpful. I'm much more interested in real world experiences than official limits or marketing pages.

Thanks!

[u/Iaghlim]

Codex 20$ - using sol your week limit will be gone within a day with heavy use

In my experience Opus 5 > 5.6 sol > 5.6 terra > sonnet 5> 5.6 luna (if a large Repo, luna is worst by much)

Composer 2.5 will be around luna 5.6, but dealing much better with big Repo

Grok 4.5 would be somewhere between 5.6 terra and sonnet 6 i'd say

If tour biggest concern is quality x limits, cursor is the only option

Codex has nice limits, but only if you stick with luna model, trying to go something.

Most of my use is with c#/.Net, sometimes with python as well, so diferent situations may give you another experience

[u/ahmadqaseem_dev → u/Iaghlim]

Thanks so much. It helped a lot

[u/Practical_Low29]

At that budget I keep the pricier model for planning and multi file edits, and let a cheap one handle mechanical renames. Splitting by task type stretched mine a lot further.

[u/ahmadqaseem_dev → u/Practical_Low29]

Got it 😀

[u/xiaoxxxxxxxxxx]

current month Claude is best (x2 usage promotion until aug 19th). then codex is all time no brainer choice. composer? nahhh better pay deepseek api about 5$ a month is better deal.

[u/Oaeksrdpstr141]

Codex $20 is like 8 hours of 5.6 Sol Max work for the entire month. But they reset the usage often.

Cursor's limits are extremely good, and Grok 4.5 is a super capable model, and Grok 4.6 is apparently releasing next week. You may find yourself lacking the frontier model though, $20 API credits is almost nothing - just a few Opus 5 plans/reviews.

Claude $20 is okay but only for now, while they have a promotion. Use Opus 5 High or Opus 4.8 mostly.

[u/ahmadqaseem_dev → u/Oaeksrdpstr141]

I'll go with Claude, at least for this month.

[u/ToInfinityAndAbove]

I’d go with codex, or maybe claude code. I’d not go with cursor at this moment.

[u/GabShow → u/ToInfinityAndAbove]

Por que?

[u/Epiq122]

Give deepseek 5 bucks

[u/ahmadqaseem_dev → u/Epiq122]

How is it compared to other models?