Help center › Credits & billing

How credits work.

Keldura uses a single, transparent credit system for everything that costs compute — transcription, imports, chat, briefings, image generation. One balance, published prices, no surprise meters.

The monthly allowance

Every account — including free accounts — gets a monthly credit allowance that renews automatically. Paid plans raise that allowance. Paid-plan subscription credits roll over for one additional renewal, up to twice the current monthly allowance; Free subscription credits do not roll over. Purchased extra credits remain available until used and are not limited by subscription spend caps. Daily and weekly spend caps apply only to subscription credits, preventing the full allowance from being spent too quickly. The daily window resets at 00:00 UTC; the weekly window resets Monday at 00:00 UTC. These reset windows do not refill or reduce your monthly balance. Your current balance is always visible at the bottom of the sidebar, and the Credit history page itemizes every charge.

What costs credits

Actions are priced individually — for example transcribing a video (by length), importing pages that require extraction or OCR, asking chat questions, generating briefings, and creating cheatsheet images. Reading, organizing, and indexing content already in your Library is free. The authoritative, always-current list is the live credit price list, which is computed from the same prices the billing ledger uses — the published numbers can't drift from what you're actually charged.

Running low, running out

Keldura nudges you when you've used about three quarters of your subscription credit pool for the period, including rollover. If you run out, actions that cost credits pause until the monthly renewal — nothing is deleted, and your existing knowledge base stays fully readable. If you hit a daily or weekly spend cap first, only new subscription-credit actions pause until that window resets; the attempted action is not charged. Purchased extra credits remain usable. To keep going with a larger monthly allowance, upgrade to a paid plan.

Plans

Keldura offers a free tier plus paid plans with larger allowances and additional capabilities (for example, the website chat widget requires a paid subscription). Current plan names, prices, and worked examples of what each allowance buys are on the pricing page. Subscriptions are handled by Stripe; you can change or cancel your plan from the pricing page while signed in.

Current active chat models

Model availability varies by plan and account. The signed-in model picker is authoritative for what you can use.

Model	Multiplier	Credits / message
GPT-5.6 Luna`gpt-5.6-luna`	0.27×	1 credits
GPT-5.4-mini`gpt-5.4-mini`	1×	2 credits
GPT-5.4-nano`gpt-5.4-nano`	1×	2 credits
GPT-5.6 Terra`gpt-5.6-terra`	2.67×	6 credits
GPT-5.6 Sol`gpt-5.6-sol`	6.67×	14 credits
GPT-5.5-pro`gpt-5.5-pro`	40×	80 credits

Common questions

Do unused credits roll over? Paid-plan subscription credits roll over for one additional renewal, up to twice the current monthly allowance. Free subscription credits do not roll over. Purchased extra credits remain available until used. Daily and weekly spend-cap windows reset on their schedule but are not separate credit grants.
Will I be charged for duplicates? Re-importing a source previews what's new first, so you don't pay to process items you already have.
Does reading cost credits? No. Browsing your Library, reading transcripts and summaries, and viewing briefings you've already generated are free — credits pay for new processing.
Where do I see what I spent? The Credit history page lists every transaction with the action, time, and amount.