Price change alerts

Get told when a price you depend on changes. Every alert carries the date the change was observed and a link to the source, exactly like the pages.

What an alert looks like

No mystery, no signing up blind. This is a real message built from the changes currently in the database:

Changes recorded by Bertrande since your last alert.
Every figure below carries the date it was observed and links to its source.

* ming-image-0.1-design (on Novita AI)
  Input price: $0.0001 to $1.00 (up 999900.0%)
  Observed 2026-09-20. https://bertrande.com/en/ai/novita/ming-image-0.1-design/

* ming-image-0.1-design (on Novita AI)
  Output price: $0.0001 to $1.00 (up 999900.0%)
  Observed 2026-09-20. https://bertrande.com/en/ai/novita/ming-image-0.1-design/

* ming-image-0.1-design-layer (on Novita AI)
  Input price: $0.0001 to $1.00 (up 999900.0%)
  Observed 2026-09-20. https://bertrande.com/en/ai/novita/ming-image-0.1-design-layer/

* ming-image-0.1-design-layer (on Novita AI)
  Output price: $0.0001 to $1.00 (up 999900.0%)
  Observed 2026-09-20. https://bertrande.com/en/ai/novita/ming-image-0.1-design-layer/

* Xiaomi: MiMo-V2.5-Pro
  Cache read price: $0.0028 to $0.096 (up 3328.6%)
  Observed 2026-10-27. https://bertrande.com/en/ai/openrouter/xiaomi--mimo-v2.5-pro/

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How we verify: https://bertrande.com/en/methodology/
Download the data: https://bertrande.com/en/data/

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We store your address and nothing else. No tracking, no profiling, no resale.

What we send, and what we deliberately do not

An alert goes out only for a change that passed every filter we apply to the site itself: a confirmed change, above 2% in size, from a source we are allowed to publish. Changes we classify as a suspicious cluster or as a floating price never reach your inbox. On the first day of collection, 81 of 123 detected changes were held back on those grounds. A false alert costs far more than a missed one, because it arrives in your mailbox.

What we do with your address

• We store the address, and nothing else. No name, no company, no profiling.
• Double opt-in. Nothing is sent until you confirm from a link we email you, so nobody can subscribe you against your will.
• Every message carries a plain-text part, written by us, with no images and nothing for us to measure. Our sending relay wraps it in minimal HTML, which we verified on a real message and state here rather than pretend otherwise.
• One-click unsubscribe in every message, pointing at this domain, and the address is dropped on the spot. Verified on a received message: the relay carries our own List-Unsubscribe header through, it does not substitute its own.
• No resale, ever. There is nothing here worth selling and we would not sell it.

Status

Email alerts are open, and nothing is sent until you confirm from a link we email you.