THU, SEPTEMBER 17, 2026
Independent · In‑Depth · Practitioner‑Tested
Claude Code Tools

Harness Prompts: 6 for Picking Between Claude Code, Codex and Cursor

All three write good code. What differs is how you run out — Codex resets every five hours, Claude shares one weekly pool with chat and Cowork, Cursor bills credits with a free mode. Claude Code limits settled lower on 14 September and OpenAI models leave Cursor on 12 November. These six prompts are for choosing on how you actually work rather than on a benchmark.

⌨️ 6 prompts 🕐 Updated Sep 17, 2026
💡 How to use these prompts: Replace everything in [BRACKETS] with your specific details before sending. Click Copy to copy any prompt to your clipboard instantly.
1
Describe your worst week, not your average one
Average weeks never break. The week before a deadline is the one that decides which tool you keep.
Here is how I actually work: [DESCRIBE A HEAVY WEEK - hours, session lengths, what you build]

For each metering model - five-hour windows, a shared weekly pool, credits - tell me what my worst day looks like and when I would first notice a limit.

Rank them by which would interrupt me least in the week I described.
2
Work out what else shares the pool
The shared pool is the most common source of unexpected limits and the least documented thing about any of these plans.
I use these products from the same vendor: [LIST]

Tell me which share a usage allowance, which are metered separately, and what is undocumented.

For anything undocumented, tell me exactly what to ask support so a vague answer is obvious.
3
Find what your context is costing
Trimming usually recovers more than a tier upgrade buys, and costs nothing.
Here is a typical session: [DESCRIBE THE TASK AND ROUGHLY HOW LONG IT RAN]

Estimate where the consumption goes, which part is avoidable, and the single change that would free the most headroom.

Give me one change, not a list. If it already looks efficient, say so.
4
Price the API against the subscription
A ceiling and an unbounded bill are opposite failure modes. Knowing the crossover point decides which risk you prefer.
My usage: [DESCRIBE]

Work out roughly what a month of this would cost on the API at current rates, and compare it against the subscription tier I am considering.

Tell me at what usage level each becomes the better deal, and what the risk is on each side.
5
Plan for the change already announced
OpenAI models leave Cursor on 12 November. That is public, dated, and the kind of thing a comparison table omits.
I am considering: [TOOL]

Tell me what changes to that tool are already announced or dated, what would break for me, and what a migration would actually involve.

Include anything where the vendor has said a capability is going away.
6
Argue against the one I have chosen
The case against surfaces what enthusiasm hides, and it is cheaper than finding out after you have built around it.
I am about to pick: [TOOL] for [WORK]

Make the strongest case against it. What I will regret, what the alternative does better, what would make me switch within six months.

Then tell me whether the argument holds or whether I should proceed.