Claude Max 20x limits

Official multipliers plus two independent measurements of absolute capacity (she-llac credit table, alldonesites live meter). Pro and Max 5x weekly figures are inferred, Max 20x is measured.

$200/mobilled monthlyHigh confidence

20x Pro usage per 5-hour session; weekly limit across all models; separate weekly Fable limit (up to 50% of weekly).

Official limit statement, summarised from Claude pricing (Anthropic), Claude Help: Max plan usage, Claude Help: weekly limits, Claude Help: usage credits at API rates.

Price: $200/mo
Billing: billed monthly
Window: 5-hour session + weekly limit
Overflow: Usage credits at standard API rates once you hit a limit.

Capacity figures

Figure	Value	Kind	Basis
Weekly capacity (API-$)	$1,099	measured	alldonesites: about $1,099 of API value per week (about 4.2 full windows), measured on 4 accounts, 21 Sep to 13 Oct 2026
Per 5-hour window (API-$)	$262	measured	alldonesites: about $262 of API value per 5-hour window (token range 676M to 1,917M per window)

official: the vendor says so. measured: an independent meter reading. inferred: estimated from measurements. derived: computed by us from other figures. unverified: we could not confirm it.

Sample week: Light coder

1 hour of agentic coding and 10 quick questions every weekday.

ForecastClaude Max 20xHigh confidence

Clear skies all week.

Fits under the weekly cap even in the high case.

Mon (Monday) ClearUnder the weekly cap $8.20$2.10–$25.50
Tue (Tuesday) ClearUnder the weekly cap $8.20$2.10–$25.50
Wed (Wednesday) ClearUnder the weekly cap $8.20$2.10–$25.50
Thu (Thursday) ClearUnder the weekly cap $8.20$2.10–$25.50
Fri (Friday) ClearUnder the weekly cap $8.20$2.10–$25.50
Sat (Saturday) ClearNothing planned $0no API-$ work
Sun (Sunday) ClearNothing planned $0no API-$ work

Cumulative API-$ through the week against the weekly cap of $1,099.

Weekly cap $1,099

Week total

Low: $10.50
Likely: $41
High: $127.50

API-$ equivalent against a weekly cap of $1,099 (measured).

Off-days

No off-days needed. The week fits even in the high case.

5-hour sessions

2 windows × $262 (measured) = $524 a day.

Every day fits inside 2 windows in the likely case.

Overflow

No overflow, even in the high case.

Usage credits at standard API rates once you hit a limit.

Edit this week in the calculator

Sample week: Heavy Claude Code user

4 hours of interactive agentic coding, 15 quick questions and 2 PR reviews every weekday.