Solana Agave 4.4 Upgrade: November Release & Key Changes

Solana’s Agave 4.4 upgrade is planned for November 2026, bringing changes to program deployment and cross program interactions.

The update is expected to require newly deployed programs to use sBPFv3 while allowing existing on-chain programs to continue running.

It will also increase the maximum depth of nested cross program invocations from four levels to eight. These changes form part of Solana’s wider network development roadmap.

Key Takeaways

• Agave 4.4 is planned for November 2026, with rollout and activation dates subject to change.

• New program deployments will need to target sBPFv3, while existing programs can continue running.

• Maximum nested cross program invocations will increase from four levels to eight.

What Is the Solana Agave 4.4 Upgrade?

Source: Solana

Agave 4.4 is an upcoming Solana software release focused on improving how programs operate within the network.

The planned update includes two main changes: sBPFv3 program requirements and deeper cross program invocation, commonly known as CPI, nesting.

The release is listed as in development, with an expected November 2026 rollout.

The published upgrade roadmap also outlines a separate Agave 4.5 release expected in December, which would increase the number of accounts supported by a version one transaction from 64 to 96.

These updates address different parts of Solana’s infrastructure. Agave 4.4 focuses on program execution and interactions, while Agave 4.5 is planned to expand transaction capacity.

It is important to distinguish expected features from completed network changes.

The Agave 4.4 timeline remains planned, so developers and validators should follow official announcements for confirmed activation dates and any adjustments to the rollout.

Agave 4.4 Features: sBPFv3 and Deeper CPI Nesting

The Agave 4.4 upgrade introduces two changes that matter to Solana developers.

sBPFv3 program deployments

Under the planned update, new program deployments must target sBPFv3. Programs already deployed on-chain will continue running, so the change does not require every existing program to be redeployed.

The upgrade reduces the number of program formats accepted for new deployments from four to one.

Developers preparing new deployments will need to account for this requirement as they plan their release process.

Deeper cross program invocations

Agave 4.4 is also expected to increase the maximum depth of nested CPI calls from four levels to eight. This allows programs to call other programs through more layers of interaction.

Both changes remain listed as in development. Developers should monitor the release status and test their applications against the intended changes before relying on them in production.

Agave 4.4 Release Date and November Rollout

The Agave 4.4 release is expected in November 2026, but its rollout follows several stages rather than a single launch date.

Anza’s published schedule gives the following tentative milestones:

• September 22: The Agave 4.4 branch was created.

• September 28: Testnet adoption was scheduled.

• October 5: Testnet feature activation was scheduled to resume.

• October 19: Mainnet beta volunteer rollout was scheduled to begin.

• November 2: General adoption was recommended.

• November 9: Mainnet beta feature activation was scheduled to resume.

These dates are tentative, and the schedule asks operators to wait for announcements before taking action.

The dates also describe different stages, so the start of a rollout should not be confused with activation of every feature.

For developers and validators, the practical approach is to track official Anza announcements and confirm the required software version before upgrading.

Following the published schedule helps teams prepare without assuming that every milestone will occur exactly as planned.

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Network upgrades can be worth monitoring, but they do not guarantee a particular market outcome.

Agave 4.4 vs Alpenglow: What Is the Difference?

Agave 4.4 and Alpenglow are separate parts of Solana’s upgrade roadmap. Although both concern network development, they focus on different areas.

Agave 4.4 is planned to change program deployment requirements and allow deeper nested CPI calls.

Alpenglow, by contrast, is a consensus protocol upgrade designed to reduce the time required for block finality.

Alpenglow uses Votor to replace Tower BFT’s consensus and finality mechanisms.

Its target is approximately 150 milliseconds for finality, compared with roughly 12.8 seconds under the previous system.

Its rollout follows a separate schedule. Testnet activation was planned first, followed by devnet and then mainnet beta after an observation period.

No confirmed mainnet activation date was announced in the update.

The distinction matters because the two upgrades should not be treated as one release. Agave 4.4 addresses program execution capabilities, while Alpenglow targets consensus and finality.

Understanding their separate timelines helps developers and network participants follow Solana’s development more accurately.

What Could Agave 4.4 Mean for Solana and SOL?

The main significance of Agave 4.4 lies in how its planned changes may affect developers building on Solana.

Requiring sBPFv3 for new deployments creates a clear program format requirement, while deeper CPI nesting provides more room for applications that need multiple layers of program interaction.

However, the upgrade alone does not establish how much adoption will increase or whether SOL’s market price will rise.

Those outcomes cannot be determined from the planned features or release schedule.

Anyone following the Solana upgrade roadmap should pay attention to three areas:

• Release status: Confirm when Agave 4.4 moves from development to activation.

• Developer readiness: Check that new programs meet the sBPFv3 requirement.

• Network developments: Track Agave 4.5 and Alpenglow separately rather than assuming their changes arrive with Agave 4.4.

These details offer a clearer way to assess progress without relying on price speculation.

As with any crypto asset, SOL remains subject to market conditions, and technical improvements do not guarantee investment returns.

Conclusion

The Solana Agave 4.4 upgrade is planned for November 2026, with sBPFv3 requirements for new program deployments and deeper CPI nesting among its main features.

These changes form part of Solana’s broader development roadmap, alongside separate upgrades such as Alpenglow and Agave 4.5.

Since the rollout schedule remains tentative, developers and validators should follow official announcements for confirmed dates.

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FAQ

What is the Solana Agave 4.4 upgrade?

Agave 4.4 is a planned Solana software release that introduces sBPFv3 requirements for new program deployments and increases the maximum depth of nested CPI calls.

When is the Agave 4.4 release date?

Agave 4.4 is expected in November 2026. The published schedule lists November 9 for mainnet beta feature activation to resume, but the date is tentative.

What is sBPFv3 in Solana?

sBPFv3 is the program format that new deployments will be required to target under the planned Agave 4.4 upgrade. Existing on-chain programs are expected to continue running.

How does Agave 4.4 differ from Alpenglow?

Agave 4.4 focuses on program deployment and deeper CPI nesting. Alpenglow is a consensus upgrade designed to reduce block finality time to approximately 150 milliseconds.

Will the Agave 4.4 upgrade increase the SOL price?

There is no guarantee that the upgrade will increase SOL’s price. Market performance depends on broader conditions, and the planned technical changes alone cannot predict future price movements.

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