On May 27, 2026, Anker Japan released its new flagship true wireless earbuds, the Soundcore Liberty 5 Pro Max and Soundcore Liberty 5 Pro, under its audio and visual brand Soundcore. Both models debut Anker's proprietary AI chip "Thus," delivering Ultra Noise Cancellation 4.0 and a Guinness World Record for call quality (G-MOS), making them the most advanced earbuds Anker has ever shipped. Prices are 26,990 yen and 36,990 yen including tax.
Debut of the Proprietary "Thus" AI Chip
The defining feature of the Soundcore Liberty 5 Pro series is the debut of Anker's proprietary AI chip "Thus" in a true wireless earbud[1]. Conventional earbud chips separate the processing CPU from the memory that holds the data being processed, but "Thus" unifies the two onto a single die. This eliminates much of the power normally consumed shuttling data between CPU and memory, and that headroom can be redirected toward computation.
According to Anker Japan, on-device processing performance is up to 150 times higher than the previous-generation Soundcore Liberty 4 Pro[1]. Features such as noise cancellation, call processing, and AI voice recording all rely on this extra compute budget. Anker Japan's official magazine page provides additional detail on how "Thus" was designed[2].
The combination of "Thus" with the newly added eight sensors enables Ultra Noise Cancellation 4.0, which Anker Japan says delivers roughly twice the noise cancellation strength of the Liberty 4 Pro[1]. Rather than applying a flat noise cancellation profile, the system analyzes the incoming noise type in real time on trains, in offices, or in cafes, and adjusts the cancellation strength accordingly.
Guinness World Record for Call Quality
Call quality is another headline feature of this generation. The new design pairs eight microphones with a newly added bone-conduction sensor, and "Thus" handles AI-based separation of ambient noise from the speaker's voice[1]. Anker Japan announced that the Soundcore Liberty 5 Pro has been certified by Guinness World Records for the highest call quality score (G-MOS) among true wireless earbuds. The certification was granted in April 2026, and the official English record name is "Highest speech quality score (G-MOS) for TWS earbuds (objective test)"[1].
G-MOS is an objective metric for assessing how clearly a speaker's voice is delivered through environmental noise, such as a station platform or a busy cafe. A Guinness World Record on this metric indicates that the product is optimized for calls in both hardware and software. With remote work and online meetings now firmly established, Anker Japan positions call quality as a non-negotiable requirement for business-oriented earbuds[1].
Liberty 5 Pro Max Adds an AI Voice Recorder
The higher-end Soundcore Liberty 5 Pro Max integrates an AI voice recorder directly into the charging case[1]. With a single tap on the case, users can record meetings, sales calls, or interviews, then have the AI generate a transcript and summary automatically. Anker has been refining AI-based transcription since the 2025 launch of the Soundcore Work, billed as one of the world's smallest AI voice recorders[3], and that experience has been folded into the charging case of the Liberty 5 Pro Max.
The practical benefit is that mobile professionals no longer need to carry both earbuds and a separate recorder. The Liberty 5 Pro Max is 36,990 yen including tax and supports magnetic wireless charging[1]. The standard 26,990-yen Soundcore Liberty 5 Pro omits the AI voice recorder and uses standard Qi wireless charging. Buyers who do not need recording can pick the standard model, while those who want a single device to handle both listening and recording can opt for the Max.
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Anker Soundcore Liberty 5 Pro Max (True Wireless Earbuds)
Top-Tier Audio and Connectivity
Both models use a 9.2 mm dynamic driver designed to keep distortion low while delivering clear midrange and high frequencies along with rich bass[1]. They support LDAC for high-resolution audio and are optimized for Dolby Atmos spatial audio. LDAC, developed by Sony, transmits significantly more audio information than standard Bluetooth codecs, allowing near-lossless playback when paired with compatible source devices.
The charging case carries a built-in display that shows battery level and lets users switch modes or adjust noise cancellation strength without opening the smartphone app. On the Liberty 5 Pro Max, the same display is used to start the AI voice recorder[1]. Both models support multipoint connections with up to three devices, which keeps switching smooth for users who move between PCs and smartphones throughout the day.
Sales channels include the dedicated landing page on the Anker Japan official online store[4], Anker Store retail locations, Amazon.co.jp, Rakuten, and select consumer electronics retailers[1]. The Soundcore Liberty series has now passed 2.5 million cumulative units sold in Japan across "Liberty Air 2 Pro," "Liberty 4," "Liberty 4 NC," "Liberty 4 Pro," "Liberty 5," and "Liberty Buds"[1], and the Liberty 5 Pro series carries that lineage forward as the new flagship.
Summary
The Soundcore Liberty 5 Pro series introduces Anker's first in-house AI chip "Thus" to true wireless earbuds, doubles noise cancellation strength compared to the previous generation, and takes a Guinness World Record for call quality among true wireless earbuds. Priced at 36,990 yen for the Liberty 5 Pro Max with its built-in AI voice recorder and 26,990 yen for the standard Liberty 5 Pro, this is a flagship refresh squarely aimed at business users.
Source: https://prtimes.jp/main/html/rd/p/000000653.000016775.html
Source: https://www.ankerjapan.com/blogs/magazine/what-is-thus
Source: https://www.ankerjapan.com/pages/soundcore-work
Source: https://www.ankerjapan.com/pages/soundcore-liberty-5-pro-series
