Braiins OS+ vs Vnish vs LuxOS: Complete Antminer Firmware Comparison 2026

Choosing the right firmware for your Antminer is one of the highest-impact decisions you can make as a miner. Stock firmware from Bitmain gets the job done, but it leaves serious performance on the table. Third-party firmware unlocks undervolting, autotuning, remote fleet management, and dramatically better efficiency — translating directly into lower power bills and higher profitability per terahash.

Three firmware platforms have emerged as the dominant options for Antminer operators in 2026: Braiins OS+ from the Czech Republic-based Braiins team, Vnish from an independent development group, and LuxOS backed by US mining infrastructure company Luxor Technology. Each takes a fundamentally different approach to pricing, optimization, and fleet management.

This guide breaks down every meaningful difference between these three platforms — autotuning algorithms, pricing models, supported hardware, performance benchmarks, and real-world use cases. No affiliate links, no bias. D-Central has repaired thousands of miners running every firmware variant, and we have seen what each platform does to hardware longevity, hashrate stability, and power efficiency firsthand. Whether you are running a single S19 in your garage or managing a fleet of S21s, this comparison will help you make the right call.

Quick Comparison: Braiins OS+ vs Vnish vs LuxOS

Before diving into the details, here is a high-level comparison of the three firmware platforms across every feature that matters:

The pricing models deserve special attention because they fundamentally shape the economics of each platform. Braiins gives you the firmware for free if you mine on Braiins Pool — they take a 2% pool fee. If you want to mine on any pool, you buy a license and the fee disappears. Vnish charges a dev fee deducted as a percentage of hashrate regardless of which pool you use. LuxOS mirrors the Braiins model but tied to Luxor Pool instead. For a home miner running one or two machines, the fee differences are marginal. For a fleet operator, the cost structure becomes a serious strategic consideration.

Braiins OS+ Deep Dive

Braiins OS+ is the most established third-party firmware in the Bitcoin mining ecosystem. Developed by Braiins — the same team that operates Braiins Pool (formerly Slush Pool, the world’s first Bitcoin mining pool) — this firmware has the longest track record and the deepest integration with mining infrastructure.

Autotuning: The Core Strength

The autotuning algorithm in Braiins OS+ is widely regarded as the most mature in the industry. Rather than relying on static voltage/frequency profiles, the system continuously tests and adjusts each hashboard to find the optimal operating point. You set a target — either a wattage limit or a hashrate target — and the firmware handles the rest. The algorithm runs during mining, so there is no extended downtime for calibration. Typical convergence takes 12 to 24 hours to reach the optimal configuration, and the system continues making micro-adjustments as ambient conditions change.

For home miners running S9-based Bitcoin space heaters, Braiins OS+ autotuning is particularly valuable. You can set a precise wattage target that matches your heating needs, and the firmware dynamically adjusts hashrate to hit that power draw consistently.

Stratum V2: The Decentralization Play

Braiins OS+ is the only major firmware with native Stratum V2 support. This is a next-generation mining protocol that fundamentally shifts power from pool operators back to individual miners. With Stratum V2, miners can construct their own block templates — choosing which transactions to include — rather than blindly hashing whatever the pool sends. For anyone who cares about Bitcoin’s censorship resistance and decentralization (and you should), this is not a minor feature. It is the most meaningful protocol improvement in mining since the original Stratum protocol launched.

BOS Toolbox: Fleet Management

BOS Toolbox is a command-line fleet management tool that lets you install firmware, configure miners, and monitor performance across hundreds of machines simultaneously via SSH. It is not the prettiest interface, but it is exceptionally reliable and scriptable. System administrators and larger operators appreciate the ability to integrate BOS Toolbox into their existing automation workflows.

Pricing Realities

The free tier routes 2% of your hashrate to Braiins Pool. If you are already mining on Braiins Pool, this is essentially free firmware — you are paying the pool fee either way. If you prefer a different pool, you need a paid license, which removes the dev fee entirely. The paid license economics make sense at scale but can feel expensive for a single home miner.

Strengths and Weaknesses

Strengths: Most mature autotuning, Stratum V2 (the only firmware offering it), reliable BOS Toolbox for fleet management, partial open-source codebase, longest market track record, excellent documentation.

Weaknesses: Free tier locks you to Braiins Pool, no Whatsminer support, BOS Toolbox is CLI-only (no web dashboard for fleet management), autotuning convergence takes longer than profile-based approaches.

Best for: Miners who want set-and-forget efficiency optimization, operators who value Stratum V2 for decentralization, and anyone already mining on Braiins Pool.

For a complete installation walkthrough, see our Braiins OS+ Setup Guide.

Vnish Firmware Deep Dive

Vnish has carved out a reputation as the power user’s firmware — the option you reach for when you need maximum performance, aggressive overclocking, or support for hardware that other firmware platforms do not cover. Developed by an independent team, Vnish has built a loyal following among operators who demand granular control and rapid support for new mining hardware.

Widest Hardware Support

Vnish’s biggest competitive advantage is model coverage. It is the only major third-party firmware that supports both Antminer and Whatsminer hardware. If you run a mixed fleet — say, a rack of S19j Pros alongside some M30S++ units — Vnish is the only firmware that lets you standardize on a single platform across all machines. This alone makes it the default choice for many medium and large-scale operators. The development team is also notably fast at releasing support for new ASIC models, often beating competitors to market by weeks or months.

Profile-Based Optimization

Where Braiins OS+ uses continuous autotuning, Vnish takes a profile-based approach. You select from pre-built optimization profiles — ranging from efficiency-focused undervolting to aggressive overclocking — and the firmware configures your miner accordingly. This approach has a clear advantage in speed: you pick a profile and the miner is running at the target configuration within minutes, not hours. The tradeoff is that profiles are generalized. They work well for most units, but may not extract the absolute maximum efficiency from a specific hashboard the way continuous per-chip tuning can.

Vnish also offers manual tuning controls that go deeper than either competitor. Experienced operators can fine-tune voltage, frequency, and fan curves at a granular level. If you know what you are doing, this level of control is powerful. If you do not, stick with the profiles.

Web Dashboard

The Vnish web dashboard is the most polished browser-based management interface of the three platforms. Real-time hashrate, temperature, power consumption, and per-board statistics are displayed in a clean interface accessible from any device on your network. For operators who prefer visual monitoring over command-line tools, this is a meaningful advantage over BOS Toolbox.

Overclocking Capabilities

Vnish is the firmware of choice for miners who want to push hardware to its limits. The overclocking profiles are more aggressive than what Braiins OS+ or LuxOS offer out of the box, with some operators reporting 15-20% hashrate gains above stock on well-cooled machines. This comes with higher power consumption and increased thermal stress, so it is not something to run on hardware with marginal cooling. But for immersion-cooled setups or well-ventilated facilities, Vnish’s overclocking capabilities are unmatched.

Pricing and Closed-Source Considerations

Vnish charges a dev fee calculated as a percentage of hashrate — typically 2-3% depending on the model and license tier. Unlike Braiins and LuxOS, there is no free tier tied to a specific pool. You pay regardless of which pool you mine on. The firmware is fully closed-source, which is a concern for some operators from both a security and a philosophical standpoint. You are running code on hardware that processes your mining rewards, and you cannot audit what that code does. For many miners, the performance benefits outweigh this concern. For the sovereignty-minded, it is worth considering.

Strengths and Weaknesses

Strengths: Widest model support (Antminer + Whatsminer), aggressive overclocking profiles, fastest new model support, excellent web dashboard, deep manual tuning options.

Weaknesses: Fully closed source, mandatory dev fee with no free tier, profile-based tuning is less precise than per-chip autotuning, no Stratum V2 support.

Best for: Operators running mixed Antminer/Whatsminer fleets, miners who want maximum overclocking performance, and anyone who values rapid new-model support.

See our step-by-step Vnish Firmware Installation Guide for setup instructions.

LuxOS Deep Dive

LuxOS is the newest entrant in the third-party firmware space, but it is backed by serious infrastructure. Luxor Technology — the US-based company behind Luxor Pool, the Hashrate Index, and multiple mining data products — developed LuxOS to complement their mining ecosystem. What LuxOS lacks in market longevity it makes up for with technical sophistication, particularly in its per-chip autotuning approach.

Per-Chip Autotuning: The Technical Edge

LuxOS’s defining feature is per-chip autotuning — the finest granularity available in any firmware platform. While Braiins OS+ tunes at the hashboard level, LuxOS individually optimizes the voltage and frequency of each ASIC chip on each hashboard. On an S19j Pro with three hashboards running approximately 126 BM1362 chips each, that means LuxOS is independently tuning 378 individual chips to find each one’s optimal operating point.

The practical result is that LuxOS can extract efficiency gains from hardware that other firmware platforms miss. Every ASIC chip is slightly different due to manufacturing variance — some chips are more efficient at lower voltages, some can clock higher without errors. Per-chip tuning accounts for this variance in a way that per-board tuning cannot. The efficiency gains are most pronounced on older or mixed-quality hardware where chip-to-chip variance is highest.

Modern API Architecture

LuxOS was built from the ground up with a modern RESTful API that makes integration with monitoring and automation systems straightforward. If you use custom dashboards, Grafana, or proprietary fleet management tools, LuxOS’s API is the cleanest to work with. The web UI is also well-designed and responsive, providing real-time per-chip telemetry that no other firmware exposes at this level of detail.

Luxor Ecosystem Integration

LuxOS integrates tightly with Luxor’s broader mining infrastructure. Hashrate data feeds directly into Hashrate Index analytics, and pool configuration is streamlined for Luxor Pool users. If you already operate within the Luxor ecosystem, LuxOS adds a layer of convenience that the other firmware platforms cannot match. If you do not use Luxor’s services, this integration is irrelevant — but the firmware stands on its own merits regardless.

Limited But Expanding Model Support

The most significant limitation of LuxOS in 2026 is model coverage. The firmware supports S19 series and S21 models, with support for additional hardware expanding over time. If you are running older hardware like S9s or S17s, LuxOS is not an option. If your fleet is S19 and newer — which is increasingly the case for active miners — this limitation is less relevant. Luxor has been steadily expanding support, and the trajectory suggests broader coverage is coming.

Pricing Model

LuxOS follows a similar approach to Braiins: free for Luxor Pool users, with a paid license option for miners on other pools. The free tier routes a small percentage of hashrate through Luxor Pool as a dev fee. The paid license removes this requirement. For operators already on Luxor Pool, this effectively makes LuxOS a free upgrade — and a compelling one given the per-chip optimization capabilities.

Strengths and Weaknesses

Strengths: Per-chip autotuning (finest granularity available), modern API and web UI, real-time per-chip telemetry, strong backing from Luxor Technology, excellent efficiency results.

Weaknesses: Limited model support (S19/S21 primarily), newest platform with shortest track record, no Stratum V2, no Whatsminer support, closed source.

Best for: S19/S21 operators who want the absolute best per-chip efficiency optimization, miners already in the Luxor ecosystem, and operators who value modern API integration.

Our detailed LuxOS Firmware Installation Guide walks through the full setup process.

Performance Benchmarks: S19j Pro Comparison

Raw numbers matter more than marketing claims. The following table shows typical performance ranges when running each firmware on an Antminer S19j Pro (stock rating: 110 TH/s at 3,250W) under standard air-cooled conditions. These figures represent real-world ranges observed across multiple units — not cherry-picked results from a single golden sample.

Important caveats: These are representative ranges, not guarantees. Actual performance depends on individual unit condition, hashboard quality, ambient temperature, cooling setup, PSU quality, and electrical supply stability. A well-maintained S19j Pro in a cool environment will hit the upper end of these ranges. A unit with degraded hashboards or running in a hot room will land at the lower end or worse.

The efficiency column tells the most important story. All three firmware platforms deliver meaningful improvements over stock — typically a 10-15% reduction in joules per terahash. Over a year of 24/7 operation, that efficiency gain translates to hundreds or thousands of dollars in electricity savings depending on your power rate. At $0.08/kWh, saving 400W on a single miner saves approximately $280 per year. Scale that across a fleet and the ROI on third-party firmware is measured in weeks, not months.

LuxOS shows a slight edge in the efficiency column, which aligns with the per-chip tuning advantage — it can find optimization opportunities that board-level tuning misses. Vnish shows the widest hashrate range, reflecting its more aggressive overclocking profiles. Braiins OS+ sits in the reliable middle ground with proven, stable efficiency gains. For a deeper understanding of the undervolting techniques these firmware platforms use, see our Complete Antminer Undervolting Guide.

Which Firmware Should You Choose?

The right firmware depends on your hardware, your priorities, and your operation’s scale. Here is a decision framework:

Choose Braiins OS+ if you:

• Want the simplest set-and-forget efficiency optimization
• Already mine on Braiins Pool (or do not mind switching)
• Care about Stratum V2 and mining decentralization
• Run S9-based Bitcoin space heaters and want precise wattage targeting
• Prefer partially open-source software you can partially audit
• Need reliable BOS Toolbox for fleet automation via SSH

Choose Vnish if you:

• Run a mixed fleet of Antminers and Whatsminers
• Want maximum overclocking performance on well-cooled hardware
• Need support for the widest range of ASIC models
• Prefer a polished web dashboard over command-line tools
• Want the fastest access to firmware for newly released miners
• Need deep manual tuning controls beyond what autotuning provides

Choose LuxOS if you:

• Run S19 or S21 series miners and want the best per-chip efficiency
• Already mine on Luxor Pool
• Value modern API integration for custom monitoring and automation
• Want per-chip telemetry data for advanced diagnostics
• Are building a new operation on current-generation hardware

For home miners running a single S19 or S21: Any of the three will deliver meaningful efficiency improvements. Start with Braiins OS+ for the lowest barrier to entry, or LuxOS if you want the cutting-edge per-chip optimization. The performance differences between the three are relatively small for a single unit — you are splitting hairs on 1-2 J/TH efficiency. Pick the one whose pricing model and pool preference align with your setup.

For fleet operators: The decision is more consequential at scale. If you run a homogeneous Antminer fleet, evaluate based on pricing model and autotuning quality. If you run mixed hardware, Vnish is likely the pragmatic choice for standardization. If you are all-in on S19/S21 and care about per-chip optimization, LuxOS is worth the evaluation.

Installation Overview

All three firmware platforms support installation via SD card or SSH. The general process is similar across all three:

1. Download the firmware image for your specific miner model from the official source
2. Back up your current configuration (pool settings, network settings)
3. Flash via SD card (write image to microSD, insert into miner, power on) or SSH (connect remotely and push the update)
4. Configure pool settings, autotuning targets, and fan profiles through the web interface
5. Monitor the autotuning process and verify stable operation

We have published detailed installation guides for each platform:

• Braiins OS+ Setup Guide — step-by-step installation, configuration, and autotuning setup
• Vnish Firmware Installation Guide — complete walkthrough including profile selection and dashboard setup
• LuxOS Firmware Installation Guide — setup, per-chip tuning configuration, and API overview
• Antminer Firmware Update Guide — general firmware update process for any Antminer
• SD Card Firmware Recovery Guide — if something goes wrong during flashing, this is your safety net

A note on firmware flashing risks: While firmware installation is generally safe and reversible, there are scenarios where things can go wrong — power loss during flashing, corrupted SD cards, or incompatible firmware versions. Always have an SD card with stock firmware ready as a recovery option. If your miner becomes unresponsive after a firmware flash, our SD Card Recovery Guide covers the restoration process.

Frequently Asked Questions

Conclusion

All three firmware platforms — Braiins OS+, Vnish, and LuxOS — deliver meaningful performance improvements over stock Bitmain firmware. There is no single “best” option. The right choice depends on your hardware mix, pool preferences, optimization priorities, and operational scale. Braiins OS+ leads in maturity and decentralization features. Vnish leads in hardware breadth and overclocking muscle. LuxOS leads in per-chip optimization precision.

The most important decision is not which third-party firmware to run — it is to stop running stock firmware altogether. Any of these three platforms will improve your efficiency, reduce your power costs, and give you control that Bitmain’s firmware simply does not offer.

D-Central has repaired and serviced thousands of miners running every firmware variant. Whether you need help with firmware installation, undervolting optimization, or hardware repair on a machine running custom firmware, our technicians have the expertise. Every hash counts — make sure yours are as efficient as possible.