ATCHED
Stellaris
Stellaris
4.5.3|Nov 5, 2026
View on Steam↗

Stellaris 4.5.3: Experimental AI and Tooltip Changes

3/5 Moderate

EXPERIMENTALAI empires manage stockpiles and market trades differently on the experimental branch, alongside tooltip changes and a possible crash fix.

Share:

Key Changes

  • 1AI empires sell resources before stockpiles reach their caps instead of wasting income.
  • 2AI empires with nearly full Trade stockpiles spend surplus on resources based on their real expenses.
  • 3A possible crash when viewing an Arkship governor or leader's skill tooltip is fixed.
  • 4Pop group upkeep and production tooltips on planets now show modifiers as well as base values.
  • 5AI Nomad empires now trade on the market based on their Operational Reserves.
  • 6AI empires no longer buy resources above their storage capacity or sell strategic resources below their own minimum.
  • 7Modifier tooltips no longer repeat the same source several times.

All Changes

🤖AI(8)

  • changeAI empires sell resources on the market before stockpiles reach their caps instead of wasting income.
  • changeAI empires with nearly full Trade stockpiles spend the surplus on resources they use, based on their real expenses.
  • changeAI Nomad empires trade on the market based on their Operational Reserves.
  • changeAI empires no longer spend currency on market purchases above their storage capacity.
  • changeAI empires no longer sell strategic resources below their own minimum.
  • fixAI empires no longer skip market trades for weeks when their preferred resource cannot be bought or sold.
  • fixAI empires that exactly meet their pop or naval capacity goal keep setting new goals.
  • fixNomad AI empires with high fleet usage apply all of their naval capacity plans.

🖥️UI/UX(12)

  • changePop group upkeep and production tooltips on planets show their modifiers instead of only the base value.
  • fixArkship: Arkship tooltips no longer show placeholder labels or cut off parts of a modifier breakdown.
  • fixThe FTL windup tooltip shows the megastructure bypass windup modifier from its real source.
  • changeStatic modifiers, such as those from Ascension Perks, can show a custom description with parameters.
  • fixModifier tooltips no longer repeat the same source across areas including happiness, growth, shipyard, housing and crime.
  • fixLeader skill and job tooltips no longer show their name twice.
  • fixThe Empire Size tooltip no longer repeats each source's name under its label.
  • fixBreakdowns in pop details tooltips use consistent indentation.
  • changePop group political power, empire size, housing and amenities tooltips show the base value for the whole group instead of one pop.
  • changeTriggered trait modifiers are listed under Species, and traits with several habitability modifiers show one combined line.
  • changeTraits added by auto-modding are listed under their own header in pop tooltips.
  • changeThe strata tooltip in the Jobs tab shows the total housing and amenities usage of that strata on the planet.

🔧Stability(2)

  • fixFixed a possible crash when viewing the skill tooltip of an Arkship governor or a leader.
  • fixFixed small memory leaks from relics, ship sections and psionic auras at game load and on mod reload.

🛠️Modding(2)

  • changeA trait description with an exclusive trigger replaces the other tooltip text only when its trigger is true.
  • changeThe print_modifiers console commands show the modifiers of a pop group.

Summary

AI and tooltips

AI empires sell resources before reaching stockpile caps, spend surplus Trade based on expenses and observe additional market limits. Nomad trading and AI capacity planning also change. The developer notes that surplus Trade spending is not currently as aggressive as it probably should be.

Pop group tooltips show more complete values, while modifier tooltips avoid repeated sources. The broader tooltip work does not affect production or upkeep tooltips, which use a separate system, though planet pop group upkeep and production tooltips receive the specific modifier change described above.

Stability and modding

A possible leader skill tooltip crash and small memory leaks are fixed. Trait description triggers and the print_modifiers console commands also change. These experimental changes may be pushed or canceled based on feedback.

← OlderStellaris 4.5.3 patch released (4e91)Nov 4, 2026Newer →Stellaris 4.5.4: Multiplayer Stability FixesNov 11, 2026

More from Stellaris

View all patches →