Via [url=https://steamcommunity.com/games/CSGO/announcements/detail/4202497395513061960]the Steam Community[/url]:

[quote=Valve][b][u]VIEWMODEL[/u][/b]
- Adjusted viewmodel bob movement
- Added "Preferred Viewmodel Left/Right Handedness" setting
- Added "Switch Viewmodel Left/Right Hand" key binding (default: US keyboard letter H) to switch hands temporarily during gameplay
- Viewmodel position setting and left/right hand state are now networked and visible to first-person spectators.
- Deprecated "Couch" viewmodel position setting

[b][u]HUD[/u][/b]
- Added "Radar Map Alternate Zoom" setting and "Toggle Radar Zoom" key binding to toggle between zoom levels during gameplay
- Added a radar icon for the local player when free cam spectating
- Added a grenade line-up reticle that appears shortly after pulling the pin. The timing can be configured for each grenade type independently
- Changed weapon Swap text (when pointing at a dropped weapon) to always show the gameplay name of the weapon instead of any customized name it might have.
- Added a kill feed icon for "in-air" kills
- Added the scoreboard to the ESC menu
- Added an icon to indicate bots on the scoreboard

[b][u]BUY MENU[/u][/b]
- Added a "Dropped Weapons" panel, which shows (and allows the direct pickup of) weapons that have been dropped by teammates that are standing in the buy zone
- Added the minimum amount of money that a player is guaranteed to have in the next round to the buy menu title bar. (thanks, Kadomos)

[b][u]GAMEPLAY[/u][/b]
- Increased Zeus movement speed and adjusted the attack cone
- Increased Zeus kill reward from $0 to $100 ($50 in Casual)
- Increased CZ75-Auto kill reward from $100 to $300 ($150 in Casual)
- Reduced XM1014 kill reward from $900 to $600 ($300 in Casual)

[b][u]INVENTORY[/u][/b]
- Lighting adjustments in Inspect background maps
- Added Wear Category to the info tooltip in the Inspect screen
- Added gameplay name in panels that used to only show customized name. E.g., Inspect screen, inventory tile

[b][u]MAPS[/u][/b]
- [b]Replaced Overpass with Dust 2 in the Active Duty Group, current competition map pool, and Premier matchmaking[/b]

[b]Baggage[/b]
- Opened roll-up doors at spawns
- Updated models for some conveyors
- Solidified stairs
- Various bug fixes

[b]Inferno:[/b]
- Removed overhanging building at top mid
- Removed overhangs at bottom of banana
- Various map tweaks to improve player collision and readability

[b]Overpass, Nuke, Vertigo, Mirage and Office[/b]
- Bug and exploit fixes
- Collision and line of sight adjustments
- Minor performance improvements

[b][u]WEAPON FINISHES[/u][/b]
- AK-47 | Inheritance: Texture and mask adjustments
- USP-S | Jawbreaker: Corrected ambient occlusion texture

[b][u]MISC[/u][/b]
- Decoupled demo playback camera movement from playback speed. This allows moving the camera even if playback is paused
- Added ability to launch practice matches and workshop maps with party members
- [b]Added Overwatch system to enable match demo review by trusted partners[/b]
- Copenhagen 2024 Major sticker capsules are on sale now -75% off
- Added ability to adjust brightness in windowed modes[/quote]

Rumor has it:

- Size is close to 2.5 GB (with Workshop Tools installed) - [b]data capped users should take action now[/b]