Choosing Between Claude Max 20x, 5x, and Pro by Weekly Usage: The Break-Even Point vs. Pay-As-You-Go API

Good morning, this is まさきん.

I subscribe to Claude’s Max 20x plan. It’s not exactly cheap each month, so I regularly ask myself whether to keep it or downgrade. I’ve put together a way to make that call based on “weekly usage,” using only official information.

This information is current as of publication. Please check the official sites for the latest details.

What Got Me Thinking About Keeping Max 20x

When I looked at my usage one week, I was at about 63% of my weekly limit. The separately displayed allowance for a specific model was at about 19%.

Seeing those numbers, I decided to stick with Max 20x for now. I put the leftover allowance toward things like writing blog posts.

Honestly, though, that decision was close to “just keeping it out of inertia.” I haven’t yet calculated the cost of combining a lower plan with pay-as-you-go billing. I plan to do that once I’ve measured my actual token counts. This post is my notes on the framework that comes before that.

Paid Plan Pricing

Here are the prices I could confirm on the official pricing page and help center. Even the Japanese pages showed prices in dollars.

The Max prices are for signing up on the web. The docs note that prices may differ if you subscribe through the mobile app.

For users in Japan, a 10% consumption tax has been added separately since April 1, 2026. The billing currency stays the same, and the tax amount appears in yen on the qualified invoice. I think comparing tax-inclusive amounts makes it less likely you’ll get the numbers wrong.

Pro can be billed annually. That works out to about $3 less per month.

How Usage Limits Work

Limits aren’t based on the number of messages. How much you consume depends on the length and complexity of your conversations, and also on the model you choose, the features you use, and your thinking depth settings.

There are two levels of limits:

1. A per-session limit every 5 hours, which resets 5 hours after you start
2. A weekly limit that applies across all models

The weekly limit resets at a fixed day and time set for each account. It doesn’t depend on when you started using it or when you subscribed.

Another important point is that every surface draws from the same allowance. Web, desktop, mobile, and Claude Code all count against the same pool. So “I barely use the chat, so I’ve got plenty left” may not hold up.

The official docs also say usage may be limited in other ways, such as monthly caps or per-model limits.

Some Models Have Their Own Allowance

Separately from the weekly limit, you may see an allowance for a specific model. On Max, for example, you can use a model called Fable for up to 50% of your weekly limit at no extra charge.

That allowance comes out of your weekly limit, and the docs say it depletes faster than other models. On Pro, by contrast, Fable is billed pay-as-you-go from the start.

My figure of about 19% was the usage of this kind of allowance. It needs to be read as something separate from the 63% overall.

How to Check Your Usage

You can check your usage in Claude’s settings.

1. Open Claude on the web or desktop
2. Click your name in the lower left and open “Settings”
3. Select “Usage”
4. Under “Current session,” check your 5-hour usage and the time remaining
5. Under “Weekly limits,” check usage across all models and per model, plus the reset date and time

The same screen also has a section for usage credits. If you’ve used pay-as-you-go billing, it’s shown separately from your plan allowance.

If you’re keeping a record, writing down the numbers right before each weekly reset seems like the way to go. With mid-week numbers, it’s hard to tell whether you used it all or had some left over.

API Pricing (per 1 Million Tokens)

To compare against a lower plan, you need to know the API rates. Here are the rates for the main models I could confirm in the official documentation:

For work that isn’t time-sensitive, the Batch API gives you a 50% discount on both input and output. It’s not suited to interactive work, though.

One thing to watch is the tokenizer. The docs say models from Claude 4.7 onward use about 30% more tokens for the same text. If you estimate based on how older models behaved, you may come in a bit low.

Usage Credits as a Safety Valve

Paid plans include a feature called usage credits. Once you hit your limit, you can keep going at the same standard rates as the API.

You turn it on under “Settings > Usage.” You set a monthly spending cap and load a prepaid balance. It’s billed separately from your subscription.

There are also bulk discounts:

Individual Pro and Max users can buy up to $2,000 a month at a discount. With up to a 30% discount, this could really pay off if you can predict your overage.

In Japan, however, there’s an expiration date. Credits purchased on or after September 10, 2026 expire 6 months after purchase. It seems best to manage prepaid credits as something separate from your subscription. I explained how to tell them apart in my post on prepaid X API credits.

How to Think About the Break-Even Point

The comparison itself is simple:

Going from Max 20x to Max 5x, the difference is $100 a month. If your overage credits would run more than $100 a month, staying on 20x is the better deal.

The hard part is the “overage token count.” Plan allowances aren’t officially stated in tokens, so I think the only option is to actually measure how you use it.

Let me do a rough calculation, too. The officially stated multipliers are 5x and 20x Pro per 5 hours. If you assume the weekly limits follow the same ratio, 63% of 20x is about 2.5 times the 5x limit. Under that assumption, downgrading to 5x would mean running out partway through the week.

That said, I couldn’t confirm the ratio between weekly limits on the official pages I checked this time, so treat this strictly as a provisional estimate. The way I think about break-even here is the same as in my post on the break-even point between inkjet and laser printers.

Decision Table by Usage Range

I’ve put together a rough guide based on weekly usage. It assumes you’re currently on Max 20x.

The 25% line comes from 5x being a quarter of 20x, assuming the weekly limits follow the same ratio.

If you’re considering Pro, the line drops even lower. Whether you consistently stay around 5% of 20x might be one benchmark.

Just like reviewing subscriptions, working backward from your usage makes it easier to review your monthly phone bill too. Rakuten Mobile uses a tiered plan based on how much you use: with the Saikyo Family Discount (最強家族割), it’s 968 yen including tax for up to 3GB, 2,068 yen including tax for up to 20GB, and unlimited data for 3,168 yen including tax beyond that.

What I’ll Measure Next

In my case, I haven’t reached a conclusion on costs yet. Next, I plan to measure my actual token counts.

There are a few ways to measure:

• Turn on usage credits and look at the overage charges
• If you use Claude Code with an API key, check the cost and token count with /cost
• Run the same work through the API and check the usage report in the Console

None of these methods may match the plan allowance exactly. Still, it should make the decision easier than having no idea at all.

Common Mistakes

The thing to watch out for most is mistaking numbers from a promotional period with boosted limits for normal ones.

I once realized a mistake after the fact: almost the entire period I’d been tracking my usage turned out to be during a promotion that increased usage limits. When the limit goes up, your usage percentage looks lower. If you decide it’s safe to downgrade based on those numbers, you might come up short under normal limits. That led me to rethink a decision once.

The official docs also say they sometimes run limited-time promotions. For example, there was a promotion that let you use Fable 5 at no extra charge. It ended on July 19, 2026.

Here are some other common pitfalls:

• Deciding based on a single week. Usage varies a lot between busy and quiet periods
• Mixing up overall usage with a per-model allowance
• Overlooking the 5-hour session limit. Your work can stall even if you have weekly room left
• Comparing prices without including the 10% consumption tax
• Counting limit resets as part of your normal allowance

Limit resets are occasionally given out to eligible plans. They refill either your session or weekly allowance. These are probably best considered separately from your normal capacity, too.

Steps and Cautions for Downgrading

Here’s roughly how I’d go about downgrading:

1. Record your weekly usage under normal limits for several weeks
2. Use the decision table to pick a candidate plan
3. Set a monthly spending cap for usage credits
4. Change your plan before your billing date
5. Record your overage for a few weeks after downgrading

Cancellations and plan changes take effect at the end of the billing period. The official docs say that to avoid the next charge, you should make the change at least 24 hours before your billing date.

Upgrading, on the other hand, is billed on a prorated basis, so downgrading and then switching back may be relatively easy. I couldn’t confirm the finer details of downgrades on the official pages I checked this time.

Things to Confirm Before You Start

• Can you see your weekly usage on the Usage screen in Settings?
• Was the period you recorded under normal limits or a promotion with boosted limits?
• Are you recording overall usage and per-model allowances separately?
• How often do you hit the 5-hour session limit?
• Do your price comparisons include the 10% consumption tax?
• What monthly cap will you set for usage credits?
• The credit expiration in Japan (6 months from purchase)
• Your next billing date, and the deadline for changes 24 hours before it

FAQ

Q. How much does Claude Max cost?

According to the official help center, Max 5x is $100 a month and Max 20x is $200 a month. These are web signup prices, excluding tax. In Japan, a 10% consumption tax is added.

Q. Are prices shown in Japanese yen?

The Japanese pricing page I checked showed prices in dollars. The Pro help article says prices are shown in local currency in supported regions. Check the final amount on the signup screen.

Q. What’s the difference between the 5-hour limit and the weekly limit?

The 5-hour limit keeps you from using too much in a short span. The weekly limit applies to your total for the week. If you hit either one, you’ll have to wait until that allowance resets.

Q. When does the weekly limit reset?

At a fixed day and time set for each account. It doesn’t change based on when you started using it or when you subscribed. You can check the next reset date and time under “Settings > Usage.”

Q. How should I choose between Max 5x and Max 20x?

The per-5-hour allowance on 20x is 4 times that of 5x. If your weekly usage on 20x keeps coming in under 25%, it may be worth considering 5x. The ratio between weekly limits isn’t officially stated, so it’s safest to keep an eye on things after downgrading.

Q. Will I be cut off if I go over the limit?

If you turn on usage credits, you can keep going at the standard API rates. Setting a monthly cap keeps you from overspending. If they’re not turned on, you’ll either wait for the reset or upgrade to a higher plan.

Q. Can I use the API with the Pro plan?

No. The docs say Pro doesn’t include API access through the Console. If you want to use the API, you need a separate pay-as-you-go account.

Official Sources I Referenced

• Claude Pricing (Claude official)
• What is the Max plan? (Claude Help Center)
• What is the Pro plan? (Claude Help Center)
• How do usage and length limits work? (Claude Help Center)
• Usage limit best practices (Claude Help Center)
• Manage usage credits for paid Claude plans (Claude Help Center)
• Buy usage bundles (Claude Help Center)
• Claude Fable models on your plan (Claude Help Center)
• What is a limit reset? (Claude Help Center)
• Cancel your Pro or Max subscription (Claude Help Center)
• Notice regarding consumption tax (JCT) for Japanese customers (Claude Help Center)
• Models, usage, and limits in Claude Code (Claude Help Center)
• Pricing (Claude Platform documentation)
• Rakuten Saikyo Plan (Rakuten Mobile official)

Summary

I find that thinking about Claude plans in terms of weekly usage makes things much easier to sort out. But usage alone won’t tell you whether you’re coming out ahead. You need to measure your overage on the lower plan in tokens.

I also took a look at AI subscriptions more broadly in my post on Google AI Pro. As a first step, try jotting down this week’s usage along with whether that week’s limit was normal.

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