After a four-year break, Infinity Ward is returning to the Call of Duty series with Call of Duty: Modern Warfare 4.

Before the full game launches in October, players will get an opportunity to test its multiplayer through a two-stage beta.

The beta introduces several changes to the traditional Call of Duty formula, including new matchmaking experiments, a redesigned Create-a-Class system, the modular Kill Block map, and a new weapon-building assistant called Gunny.

Here's everything you need to know before jumping into the beta.

📅 Modern Warfare 4 Beta Dates

Activision has officially confirmed two beta weekends.

Weekend One — Early Access

August 21–25, 2026

The first weekend is an Early Access period.

Players can gain access by pre-ordering or pre-purchasing Modern Warfare 4 on supported platforms.

Early Access is available on:

• Xbox Series X|S
• PlayStation 5
• PC

Activision's official beta FAQ confirms that Early Access begins on August 21 and continues through August 25.

Weekend Two — Open Beta

August 28–September 1, 2026

The second beta weekend opens the experience to everyone.

No pre-order is required.

Importantly, this is also when Nintendo Switch 2 players join the beta.

Activision states that all supported platforms can participate during the Open Beta weekend beginning August 28.

🎮 Modern Warfare 4 Beta Schedule

The beta is designed to give Infinity Ward player feedback before the game's full launch.

🏆 What Is the Kill Block Map?

One of the most interesting additions in the beta is Kill Block.

Unlike a conventional multiplayer map, Kill Block is designed around a modular layout.

Different sections can change between rounds, altering:

• Sightlines
• Routes
• Cover
• Engagement distances
• Tactical approaches

This means players cannot simply memorize one static layout and expect every round to play identically.

Xbox describes Kill Block as a dynamic battlefield where the map can reconfigure between rounds.

🔫 New Gunsmith and Create-a-Class Systems

Modern Warfare 4 is also changing how players build their multiplayer loadouts.

The redesigned Create-a-Class system brings Operators, weapons, equipment, and Killstreaks together into a more unified loadout interface.

The Gunsmith has also been streamlined.

Attachments are shared across weapon classes in ways designed to make experimenting with different builds easier.

The goal is simple:

Less time navigating menus → more time actually playing.

The game's Steam information describes the redesigned system as being focused on getting players into specialized builds more quickly.

🪖 Meet Gunny

One of the most talked-about features heading into the beta is Gunny.

Gunny is a virtual gunnery-sergeant-style assistant built into the Gunsmith.

But there's an important misconception to clear up:

Gunny is NOT an AI chatbot.

Infinity Ward has explicitly stated that Gunny is handcrafted by its developers, rather than being powered by generative AI.

Its job is to recommend weapon configurations based on:

• Your weapon
• Your unlocked attachments
• Your preferred playstyle
• The type of build you want

For example, Gunny can help create builds focused on:

Close range → Mid range → Long range

Infinity Ward has said that Gunny uses developer-created recommendations and the attachments available to the player.

🤖 Is AI Actually Being Used in Modern Warfare 4?

This is where the story becomes more complicated.

Although Gunny itself isn't AI, Infinity Ward has acknowledged using AI tools elsewhere in the game's development.

The distinction is important:

Gunny

Handcrafted by developers.

AI in development

Used as a development tool in some parts of the production process.

So describing Modern Warfare 4 as having an "AI-powered Gunny" would be inaccurate.

🎯 Low-SBMM Playlists

Another major experiment in the beta involves skill-based matchmaking.

Infinity Ward is introducing specific low-SBMM playlists during the beta.

The goal is to let the studio gather more information about different matchmaking approaches and how players respond to them.

Activision has acknowledged that it is continuing to learn about multiplayer matchmaking, making the beta an important testing ground for these changes.

This could make the beta particularly interesting for longtime Call of Duty players who have criticized traditional matchmaking systems.

🏃 Movement and Multiplayer Gameplay

The beta will also give players their first broad hands-on experience with Modern Warfare 4's updated movement system.

Infinity Ward is using the playtest to gather feedback on:

• Movement speed
• Gunplay
• Weapon handling
• Combat pacing
• Map flow
• Multiplayer balance

The goal is to refine the experience before launch.

🔦 The Muzzle Flash Controversy

Early Modern Warfare 4 gameplay footage generated criticism because of extremely bright muzzle flashes.

Infinity Ward later clarified that the unusually intense visual effect shown in the footage was a bug, rather than the intended final presentation.

That means beta players should not necessarily expect the same visual effect seen in the earliest gameplay demonstrations.

🔫 Weapons in the Beta

The beta isn't just a small technical test.

Players will have access to a substantial selection of weapons and multiplayer content.

Activision's beta information says players can unlock 19 different weapons during the test.

That gives players enough equipment to experiment with the redesigned Gunsmith and Gunny systems.

🧪 Training Mobility Course

Modern Warfare 4's beta also introduces a Training Mobility Course.

This provides players with a dedicated environment to familiarize themselves with the game's movement mechanics.

It's particularly useful for players who haven't played the franchise recently and want to understand the new movement system before jumping into competitive multiplayer.

🎮 Beta Platforms

The Modern Warfare 4 beta is being released across a wide range of hardware.

Nintendo Switch 2 players join during the August 28 Open Beta rather than the first Early Access weekend.

🎟️ Do Game Pass Subscribers Get Early Access?

This year's system is different from what some players may expect.

Game Pass subscribers do not receive a special beta Early Access window simply because they subscribe.

The Early Access period is tied to pre-ordering or pre-purchasing the game.

Activision's official FAQ states that players can secure Early Access by pre-ordering or pre-purchasing a supported edition.

Microsoft's current store information also states that Modern Warfare 4 is not available through Game Pass at launch.

💻 PC Requirements and Security

PC players should also be aware that Modern Warfare 4 uses additional security requirements.

Microsoft's store listing notes requirements including:

• TPM 2.0
• Secure Boot
• Supported Windows configuration

These requirements are intended to strengthen the game's security environment and anti-cheat protections.

📅 When Does Modern Warfare 4 Release?

The full game is scheduled to launch on:

October 23, 2026

The beta therefore represents the final major public test before launch.

Digital pre-orders also receive Campaign Early Access beginning October 16.

🎬 Campaign Early Access

Players who digitally pre-order Modern Warfare 4 can begin the campaign before the official release.

Campaign Early Access

October 16, 2026

Full Launch

October 23, 2026

Activision is positioning the campaign as a large-scale military experience featuring:

• Covert operations
• Large battles
• Combined-arms warfare
• Cinematic sequences

🌐 What About DMZ?

Modern Warfare 4 will also introduce a new DMZ experience.

However, DMZ is not the focus of the August multiplayer beta.

Activision has been keeping more details about the mode for later, meaning beta players should not expect the full DMZ experience to be available during the initial test.

📊 Modern Warfare 4 Beta at a Glance

🗓️ Modern Warfare 4 Timeline

August 21, 2026

Early Access beta begins.

August 25, 2026

First beta period ends.

August 28, 2026

Open Beta begins for all players, including Nintendo Switch 2.

September 1, 2026

Open Beta ends.

October 16, 2026

Campaign Early Access begins for eligible digital pre-orders.

October 23, 2026

Call of Duty: Modern Warfare 4 launches worldwide.

❓ Frequently Asked Questions

When is the Modern Warfare 4 beta?

Early Access runs from August 21–25, 2026. The Open Beta runs from August 28–September 1, 2026.

Is the Modern Warfare 4 beta free?

The Open Beta is free and does not require a pre-order. Early Access requires a qualifying pre-order or pre-purchase.

Is Modern Warfare 4 on Game Pass?

The game is not available through Game Pass at launch.

Is Gunny an AI chatbot?

No. Infinity Ward says Gunny is handcrafted by developers and recommends builds using unlocked attachments.

What is Kill Block?

Kill Block is a modular multiplayer map that can change its layout between rounds.

How many weapons are in the beta?

Activision's beta information says players can unlock 19 weapons during the test.

Is Modern Warfare 4 coming to Nintendo Switch 2?

Yes. Switch 2 players can participate during the Open Beta beginning August 28.

When does Modern Warfare 4 release?

The full game launches on October 23, 2026.

🏁 The Bottom Line

The Modern Warfare 4 beta is shaping up to be more than a simple preview.

Infinity Ward is using it to test several significant changes, from low-SBMM playlists to a redesigned Gunsmith and the modular Kill Block map.

The biggest misconception surrounding the beta is Gunny.

Despite looking and behaving like a virtual assistant, Gunny isn't a generative AI chatbot. Infinity Ward says the system is handcrafted and simply recommends weapon builds using the attachments players have unlocked.

The beta begins with Early Access on August 21, followed by the Open Beta on August 28.

Then comes the full game on October 23, 2026.

The next Modern Warfare era starts with the beta.