<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e3bd2-528c-7a16-887b-80b6a184c1e9,g:68b700ad-f0ee-40d2-b31f-bd20fa1f468e-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.oklo.com/role/Cover" xlink:type="simple" xlink:href="oklo-20260603.xsd#Cover"/>
  <link:presentationLink xlink:role="http://www.oklo.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e3bd2-528c-7d72-b0cb-0a6a6d2e952b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_DocumentType_019e3bd2-528c-7d72-b0cb-0a6a6d2e952b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e3bd2-528c-71f6-a1f5-540bd6e8ac21" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_DocumentPeriodEndDate_019e3bd2-528c-71f6-a1f5-540bd6e8ac21" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e3bd2-528c-7975-8360-fbd6fe3909b1" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityRegistrantName_019e3bd2-528c-7975-8360-fbd6fe3909b1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e3bd2-528c-7661-8c72-28428c1ffa5b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_CityAreaCode_019e3bd2-528c-7661-8c72-28428c1ffa5b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e3bd2-528c-7fa3-bd9b-5c371ce2dad5" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_LocalPhoneNumber_019e3bd2-528c-7fa3-bd9b-5c371ce2dad5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e3bd2-528c-735d-9fc6-4a85d47a0499" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityAddressAddressLine1_019e3bd2-528c-735d-9fc6-4a85d47a0499" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e3bd2-528c-7bd3-9bee-f6ea7d41db45" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityAddressCityOrTown_019e3bd2-528c-7bd3-9bee-f6ea7d41db45" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e3bd2-528c-729e-ba43-6bcefbc25b44" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityAddressStateOrProvince_019e3bd2-528c-729e-ba43-6bcefbc25b44" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e3bd2-528c-76bd-8ec6-2bd69877ee56" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityAddressPostalZipCode_019e3bd2-528c-76bd-8ec6-2bd69877ee56" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019e3bd2-528c-7e3e-b755-9a80e90d48a0" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_WrittenCommunications_019e3bd2-528c-7e3e-b755-9a80e90d48a0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019e3bd2-528c-7494-8a29-b07e9e5ddc37" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_SolicitingMaterial_019e3bd2-528c-7494-8a29-b07e9e5ddc37" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019e3bd2-528c-7802-9528-241501be4232" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_PreCommencementTenderOffer_019e3bd2-528c-7802-9528-241501be4232" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019e3bd2-528c-78c9-86fa-6f1d1d40f2e6" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019e3bd2-528c-78c9-86fa-6f1d1d40f2e6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e3bd2-528c-7ee8-94f7-ac206dde33c5" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e3bd2-528c-7ee8-94f7-ac206dde33c5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_019e3bd2-528c-7cf0-bb65-a3b5de3cf53b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityExTransitionPeriod"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityExTransitionPeriod_019e3bd2-528c-7cf0-bb65-a3b5de3cf53b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e3bd2-528c-799a-aa96-ea37bb1802b6" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e3bd2-528c-799a-aa96-ea37bb1802b6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e3bd2-528c-7c4d-b443-9ad880587941" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityFileNumber_019e3bd2-528c-7c4d-b443-9ad880587941" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e3bd2-528c-78cc-84e7-1126feb9fa67" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e3bd2-528c-78cc-84e7-1126feb9fa67" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e3bd2-528c-711d-a826-c741448ee211" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_Security12bTitle_019e3bd2-528c-711d-a826-c741448ee211" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e3bd2-528c-7568-a228-180a960454cd" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_TradingSymbol_019e3bd2-528c-7568-a228-180a960454cd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e3bd2-528c-74ef-be0f-0a9adca0e022" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_SecurityExchangeName_019e3bd2-528c-74ef-be0f-0a9adca0e022" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e3bd2-528c-76d0-9504-ffc0661ea7c0" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_EntityCentralIndexKey_019e3bd2-528c-76d0-9504-ffc0661ea7c0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e3bd2-528c-7dad-84ed-857f796cb94f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e3bd2-528c-7ff1-bd58-4be1c63cf31f" xlink:to="loc_dei_AmendmentFlag_019e3bd2-528c-7dad-84ed-857f796cb94f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
