---
title: "How does incremental computation change AI cost?"
description: "Incremental compute cost means you pay model APIs mainly for new or changed rows. Cached columns are not sent again."
url: "https://pixeltable.com/learn/what-is-incremental-compute-cost"
updated: "2026-09-29"
vertical: "Cost"
doc: "https://pixeltable.com/pricing"
---

# How does incremental computation change AI cost?

Incremental compute cost means you pay model APIs mainly for new or changed rows. Cached columns are not sent again.

Updated: 2026-09-29
Part of [What is incremental computation?](https://pixeltable.com/learn/what-is-incremental-computation).

## On this page

- [How it works](https://pixeltable.com/learn/what-is-incremental-compute-cost#how-it-works)
- [What it is not](https://pixeltable.com/learn/what-is-incremental-compute-cost#what-it-is-not)
- [Comparison](https://pixeltable.com/learn/what-is-incremental-compute-cost#comparison)
- [Where Pixeltable fits](https://pixeltable.com/learn/what-is-incremental-compute-cost#where-pixeltable-fits)
- [Questions](https://pixeltable.com/learn/what-is-incremental-compute-cost#questions)

## How it works {#how-it-works}


- The first insert calls the model.
- An unchanged row is not called again.
- An edit calls the model for the descendants of that row.

## What it is not {#what-it-is-not}

It does not make the first embedding call free, and it does not make RAG free.

## incremental compute cost: this, and the thing it is confused with {#comparison}

|  | This | Not this |
| --- | --- | --- |
| First row | Billed by the model provider | Free because the engine is free |
| Unchanged row | No new model call | Reprocessed nightly |
| Edit | Descendants only | The whole corpus |

## Where Pixeltable fits {#where-pixeltable-fits}

Pixeltable caches computed columns, so a re-insert of the same work does not repeat the provider call.

## Questions {#questions}

### How does incremental compute cost work? {#faq-1}

The first insert calls the model. An unchanged row is not called again. An edit calls the model for the descendants of that row.

### What is incremental compute cost often confused with? {#faq-2}

It does not make the first embedding call free, and it does not make RAG free.

## In the blog

- [Pixeltable vs Pinecone: When You Need a Vector Database vs Unified AI Infrastructure](https://pixeltable.com/blog/pixeltable-vs-pinecone-vector-database-comparison)
- [The Invisible 80%: Why Your AI Agent Demo Won't Survive Production](https://pixeltable.com/blog/invisible-infrastructure-production-ai-agents)
- [Stop Labeling Duplicates: Semantic Deduplication for Multimodal Datasets](https://pixeltable.com/blog/semantic-deduplication-curation)
- [The Economics of Incremental AI: Stopping the Re-computation Cash Burn](https://pixeltable.com/blog/economics-of-incremental-ai)
- [Multi-Provider AI Strategy: OpenAI vs Claude vs Groq vs Deepseek vs Gemini vs Bedrock Comparison](https://pixeltable.com/blog/multi-provider-ai-strategy-comparison-guide)
- [Why AI Teams Are Switching from Vector Databases to Pixeltable for Multimodal Applications](https://pixeltable.com/blog/teams-switching-pixeltable-vector-databases)

## Related

- [Documentation](https://pixeltable.com/pricing)
- [The Economics of Incremental AI: Stopping the Re-computation Cash Burn](https://pixeltable.com/blog/economics-of-incremental-ai)
- [Incremental updates](https://pixeltable.com/use-cases/incremental-updates-ai-data-processing)