NovaSeq X by Illumina: status and timeline

Milestones

Next · Regulatory approval for clinical whole-genome sequencing in rare disease diagnosis

NovaSeq X series announcedSep 2022Complete.
890 NovaSeq X systems installed globallyDec 2025Complete.
Q70 quality, 30% speed increase, 35B reads/run 2026 updates released2026Complete.
TruPath Genome clinical bioinformatics software launchedFeb 2026Complete.

Most important updates

Illumina releases NovaSeq X updates: Q70 quality, 30% faster, 35B reads/runJul 2026
Illumina launches TruPath Genome bioinformatics for clinical diagnosticsFeb 2026
Illumina publishes benchmark: NovaSeq X 6× fewer SNV errors, 22× fewer indels vs Ultima UG 100Oct 2025
Illumina unveils NovaSeq X series with duplex sequencing and 2.5× higher throughputSep 2022

Upcoming

2027Regulatory approval for clinical whole-genome sequencing in rare disease diagnosis (next)
2027Insurance reimbursement expansion for NovaSeq X-based clinical genomic tests

Current obstacles

Structural variants and long reads150-base reads limit detection of >50kb structural variants. Long-read competitors excel here.
Clinical adoption and reimbursementRegulatory approval and insurance reimbursement for clinical WGS remain limited despite <$200 cost.

Physics limits

Read length is fixed by cluster generation150–300 base chemistry limits; longer reads needed for phasing and repetitive sequences.
Throughput trade-off with read lengthLonger reads reduce cluster density per run; NovaSeq X optimizes throughput over length.

How it works

4 parts

Cluster generation

Millions of DNA clusters on a flow cell

DNA fragments bound and amplified in place on glass, creating indexed clusters.

Sequencing

Fluorescent base incorporation

Each base carries fluorescent dye (A/T/G/C); cameras record base incorporation in each cycle.

Data generation

Billions of reads assembled into a genome

Reads aligned to reference genome for variant detection and whole-genome assembly.

Clinical accuracy

Q70 quality for variant calling

Q70 (99.99999% accuracy) enables confident SNV and indel calling in clinical genomics.

Spec sheet

Spec	NovaSeq X
Reads per run (2026 update)	Up to 35 billion^R (reported)
Maximum quality score (2026)	Q70^R (reported)
Speed improvement (2026 update)	30% faster run time^R (reported)
Cost per human genome (2026)	$200 or less^R (reported)
Systems installed globally (mid-2026)	890+^R (reported)

^R reported by the company

Papers & demos

2 items

Feb 2026demo
TruPath Genome launches for clinical whole-genome sequencing (opens illumina.com)Bioinformatics combining NovaSeq X accuracy with variant calling for clinical diagnostics.
Sep 2022demo
NovaSeq X series announced (opens illumina.com)Duplex sequencing doubles speed, triples accuracy vs prior systems; 2.5× throughput.

Update log

4 updates

About Illumina

The team behind NovaSeq X

Illumina

Genomics, sequencing, NovaSeq X, DNA sequencing

Illumina develops DNA sequencing systems and software for genomic research and clinical diagnostics. NovaSeq X is the leading platform for high-throughput sequencing with 890+ systems installed globally as of mid-2026.

Founded 1998, Illumina pioneered cluster generation for high-throughput genome sequencing at scale.
NovaSeq X (launched Sept 2022) is installed in 890+ sites globally. 2026 updates: Q70 accuracy, 30% faster, 35B reads/run.
Cost per genome below $200 in 2026. ~70-80% market share in global sequencing.

illumina.com (opens illumina.com)Company profile →

Founded: 199828 yrs
Headquarters: United States
Status: Public
Valuation: public
Staff: ~10,355
Works in: BiotechGenomics & sequencing
Coverage: 1 program · 5 updateslatest 1 Jul 2026checked 10 Oct
Customers: Academic and clinical labs (opens illumina.com)
Acquired by: GRAIL (opens grail.com)
People: Charles Dadswell (opens illumina.com)Interim Chief Executive Officer

Spec

NovaSeq X

Reads per run (2026 update)

Up to 35 billion^R (reported)

Maximum quality score (2026)

Q70^R (reported)

Speed improvement (2026 update)

30% faster run time^R (reported)

Cost per human genome (2026)

$200 or less^R (reported)

Systems installed globally (mid-2026)

890+^R (reported)

NovaSeq X

Milestones

Most important updates

Upcoming

Current obstacles

Physics limits

How it works

Millions of DNA clusters on a flow cell

Fluorescent base incorporation

Billions of reads assembled into a genome

Q70 quality for variant calling

Spec sheet

Papers & demos

Update log

Jul 2026

Feb 2026

Oct 2025

Sep 2022

About Illumina

Current obstacles

Physics limits

How it works

Millions of DNA clusters on a flow cell

Fluorescent base incorporation

Billions of reads assembled into a genome

Q70 quality for variant calling

Spec sheet

Papers & demos

Update log

Jul 2026

Feb 2026

Oct 2025

Sep 2022

About Illumina