teng-lin--notebooklm-py/docs/quota-limits.md

NotebookLM quota & tier limits (reference)

A human-reference table of NotebookLM's static, published plan limits per tier — how many notebooks, sources, chats, and studio artifacts each subscription level allows.

What this is NOT: live per-account remaining counts or reset timestamps. NotebookLM does not expose those through any known RPC — GET_USER_SETTINGS carries only the static plan limits, not usage counters. See #1825 for the research trail. This document is therefore prose reference, not shipped code (see Why this lives in docs).

⚠️ Captured from Google's public pages on the dates noted below. Every table Google publishes is headed "Usage Limits (Subject to Change)". Google restructured consumer tiers as recently as May 2026 and has changed enforced limits without updating the published tables (see Caveats). Treat these numbers as a dated snapshot, re-verify against the source links before relying on a specific value, and prefer the authoritative live signal — AccountLimits.tier — over hard-coding any of this.

Relationship to AccountLimits.tier

(await client.settings.get_account_limits()).tier (and the tier field in MCP/REST server_info(include_account=True)) returns the subscription tier as an opaque integer read from GET_USER_SETTINGS limits[4]. This table is what those integers mean in quota terms.

tier int	Plan	Live-confirmed?
1	Standard / Free	✅ yes (source limit 50 matches Google)
2	Pro	✅ yes (source limit 300 matches Google)
4	Plus	decoded from the web pro-badge bundle
3	Ultra (20 TB)	decoded
6	Ultra (30 TB)	decoded
5	"Expanded"	decoded — aligns with the Workspace "Expanded" access level below (not a consumer plan, which is why it is absent from Google's consumer page)

The tier int is an opaque key, not an ordinal — 4 (Plus) is numerically higher than 2 (Pro) but a lower plan. Look it up in this table; never compare tier ints with </>.

Two things the tier int alone cannot tell you:

1. Consumer vs Workspace vs Enterprise. Pro (consumer), Higher (Workspace), and Enterprise all report notebook_limit=500 / source_limit=300, so the two quota numbers do not disambiguate the surface. The three tables below diverge — pick the row that matches how the account was provisioned.
2. The per-source size cap. limits[3] (e.g. 500000) is the per-source size limit; it matches the Enterprise "500,000 words per source" figure. notebook_limit = limits[1], source_limit = limits[2], tier = limits[4]. See rpc-reference.md.

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Consumer — notebooklm.google.com

Source: support.google.com/notebooklm/answer/16213268 · captured 2026-07-09. Five tiers since May 2026 (Standard, "in Plus" = Google AI Plus, "in Pro" = Google AI Pro, "in Ultra 20 TB", "in Ultra 30 TB"). "NotebookLM in Plus" ≠ the retired 2024–25 "NotebookLM Plus" product.

Feature	Standard (1)	Plus (4)	Pro (2)	Ultra 20TB (3)	Ultra 30TB (6)
Notebooks (per user)	100	200	500	500	500
Sources (per notebook)	50	100	300	500	600
Chats /day	50	200	500	2,500	5,000
Audio Overviews /day	3	6	20	100	200
Video Overviews /day	3	6	20	100	200
— Cinematic Video /day	—	—	2	10	20
Reports /day	10	20	100	500	1,000
Flashcards /day	10	20	100	500	1,000
Quizzes /day	10	20	100	500	1,000
Mind Maps /day	10	20	100	500	1,000
Deep Research	10/month	3/day	20/day	75/day	200/day
Data Tables	Limited	More	High	Higher	Highest
Infographics	Limited	More	High	Higher	Highest
Slide Decks & Revisions	Limited	More	High	Higher	Highest
Watermark removal	No	No	No	Yes	Yes (Infographics + Slide Decks)

The column headers show the tier int this package returns for each plan. Italic cells are qualitative labels Google publishes instead of numbers — see Unquantified features.

Workspace / EDU

Source: support.google.com/notebooklm/answer/16337734 · captured 2026-07-09. Five access levels mapped to editions: Standard (Business Starter, Enterprise Essentials, Frontline, Nonprofits, Education Fundamentals/Standard, …) · More (Education Plus, Teaching & Learning add-on) · Higher (Business Standard/Plus, Enterprise Standard/Plus, Google AI Pro for Education) · Expanded (AI Expanded Access add-on) · Highest (AI Ultra Access add-on).

Feature	Standard	More	Higher	Expanded	Highest
Notebooks (per user)	100	200	500	500	500
Sources (per notebook)	50	100	300	400	600
Chats /day	50	200	500	1,000	5,000
Audio Overviews /day	3	6	20	40	200
Video Overviews /day	3	6	20	40	200
— Cinematic Video /day	—	—	2	4	20
Reports / Flashcards / Quizzes / Mind Maps /day (each)	10	20	100	200	1,000
Deep Research	10/month	3/day	20/day	30/day	200/day
Data Tables / Infographics / Slide Decks	Limited	More	Higher	Expanded	Highest
Watermark removal	No	No	No	Yes	Yes (Infographics + Slide Decks)

The Workspace ladder deliberately diverges from consumer at the Expanded rung (bold): weaker than consumer Ultra-20TB (400 vs 500 sources, 1K vs 2.5K chats, 40 vs 100 audio/video, 200 vs 500 assets, 30 vs 75 Deep Research). The tier=5 ("Expanded") the badge bundle exposes lines up with this level.

Enterprise (Gemini Enterprise / Agentspace)

Source: docs.cloud.google.com … notebooklm-enterprise/overview · page stamped 2026-07-07.

Feature	Limit
Notebooks	500 /user
Sources	300 /notebook
Source size	500 MB or 500,000 words per source (only tier with a documented per-source cap)
Chats	500 /user/day
Audio Overviews / Video Overviews / Mind Maps / Reports	20 /user/day each
Slide Decks / Infographics	15 /user/day each (the only surface publishing numbers for these)
Flashcards · Quizzes · Deep Research · Data Tables · narrated slideshows	no published quota

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Unquantified features

For Data Tables, Infographics, and Slide Decks & Revisions, Google publishes qualitative labels (Limited / More / High / Higher / Highest) rather than numbers on consumer and Workspace tiers — and Wayback snapshots (Nov 2025 → Jul 2026) confirm the numbers never existed, they were qualitative from the day the rows appeared. Best-known values, with an evidence class per cell:

Feature	Tier	Best-known limit	Evidence
Infographics	Free/Standard	~3/day	observed — community/third-party testing (tenorshare, 2026-05-26); in-app error "You have reached your daily Infographic limits". No official number.
Infographics	Plus / Pro / Ultra / all Workspace	unknown	qualitative labels only
Infographics	Enterprise	15/user/day	official (cloud docs)
Slide Decks & Revisions	consumer / Workspace	unknown	help page confirms revision quotas exist but publishes no value
Slide Decks & Revisions	Enterprise	15/user/day	official (cloud docs)
Data Tables	any tier, incl. Enterprise	unknown	no number in any source; the Enterprise table has no Data Tables row at all
Narrated slideshows	any tier	—	no separate quota row; subsumed under Slide Decks

Evidence classes: official = published by Google · observed = community/third-party report or in-app error text, no official figure · unknown = acknowledged-to-exist but unpublished.

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Reset & counting semantics

• Daily quotas reset after 24 hours; monthly quotas after 30 days. Rolling windows (from first use), not calendar-midnight.
• Notebook caps are per-user; source caps are per-notebook; all chat/generation quotas are per-user per-day. "Sharing a notebook does not change the source limit for any collaborator."
• Deep Research is the only monthly quota, and only at Standard/free (10/month) — a counterintuitive kink (Standard 10/month vs Plus 3/day) Google publishes on both consumer and Workspace pages.
• First-add auto-generated artifacts (the report/flashcards/infographic/slide-deck/audio/video overview generated when sources are first added) are generated once and do not count against limits.

Caveats

• Dated snapshot. Consumer tiers were restructured May 2026 (4 tiers → 5, Ultra split into 20 TB / 30 TB). Re-check the source links before trusting a value.
• Enforced limits change without doc updates. On 2025-11-25 NotebookLM temporarily rolled Infographics/Slide Decks back to 0 for Free users and imposed unspecified extra limits on Pro, due to demand (@NotebookLM); access was later restored. The published tables did not reflect this.
• No per-source word/size cap is published for consumer/Workspace — the "500K words/source" figure is documented only for Enterprise. (limits[3] ≈ 500000 in the settings vector may be the same cap surfaced per-account; unconfirmed.)
• No sharing/collaborator-count limits are documented on any tier.

Why this lives in docs, not code

This package ships the authoritative live signal as code — AccountLimits.tier (the opaque int from the quota block). It deliberately does not ship this table as constants, because the data is:

1. Heterogeneous — a mix of official numbers, community-observed values, and acknowledged-but-unknown quotas. Optional[int] + provenance could model it, but a typed lookup would imply a false authority the source data doesn't have.
2. Google-owned and volatile — the tier scheme itself changed in May 2026, and enforced limits have changed without the published tables updating. Baking it into code guarantees stale, authoritative-looking values.
3. Not needed at runtime — the library never enforces these limits; the server surfaces the tier int and the actual notebook_limit / source_limit the account reports live. Callers that want a human answer look here.

This mirrors the same call made for the tier→label mapping: ship the int, keep the table in docs.

Sources

• Consumer limits (live + 5 Wayback snapshots Nov 2025–Jul 2026)
• Workspace / school limits (EN + JA)
• Enterprise limits
• Slide Deck revision help page
• Create a notebook — usage-limit note
• @NotebookLM rollback, 2025-11-25 · XDA coverage
• Data Tables launch · blog.google
• tenorshare infographic-limit report

Research provenance: multi-angle deep-research runs on 2026-07-09 and 2026-07-10 (adversarial verification; Wayback archaeology; EN + JA locales), recorded in #1825.