---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-002328"
form_type: "8-K"
ticker: "RGTI"
cik: "0001838359"
company_name: "Rigetti Computing, Inc."
filed_at: "2026-01-09T23:59:59+00:00"
generated_at: "2026-05-16T11:05:33.657320+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Rigetti delays 108-qubit Cepheus-1-108Q general availability to end of Q1 2026

## Summary
- Cepheus-1-108Q now expected to reach general availability around end of Q1 2026, previously earlier timeline.
- Median two-qubit gate fidelity achieved: 99% on 108-qubit, 99.7% on 9-qubit, 99.6% on 36-qubit systems.
- CEO cites complexities with tunable couplers; company running another chip iteration to optimize fidelity.
- System uses twelve 9-qubit chiplets and will be Rigetti's highest qubit count modular system.

## SEC filing metadata
- accession: 0001104659-26-002328
- form_type: 8-K
- ticker: RGTI
- cik: 0001838359
- company_name: Rigetti Computing, Inc.
- filed_at: 2026-01-09T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1838359/000110465926002328/0001104659-26-002328-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1838359/000110465926002328/tm262713d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-002328
- JSON: https://secwatch.observer/filing/0001104659-26-002328.json
- Plain text: https://secwatch.observer/filing/0001104659-26-002328.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.