Product details · WUT-LANGSMITH-EDITOR
Langsmith Editor
Langsmith confirms the Editor service ended March 31, 2026. Cowriter is a separately launched successor requiring a new account.
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The record
An AI academic-writing editor for drafting and revising English papers, with grammar correction, field-specific expression suggestions, example search and Google Drive integration.
- Operator at shutdown
- Langsmith Inc. Company source
- Launched
- Apr 2020Launch source
- Discontinued
- 31 Mar 2026Closure source
- Lifespan
- About 5 years 11 months
How it ended
Langsmith confirms the Editor service ended March 31, 2026. Cowriter is a separately launched successor requiring a new account.
Langsmith Editor — official completed discontinuation schedule ↗ · Checked 10 Oct 2026
Sources and verification
- Shutdown
- March 31, 2026 is the actual final service day confirmed by the June 1, 2026 update, which expressly says the schedule was completed. April 1 was the first day without login; April 30 refund completion and May 31 support/data handling are separate milestones. The notice explicitly uses JST (UTC+9), but does not give a final cutoff hour. December 18, 2025 is the stated announcement date. The closure covers the complete Editor workspace; Langsmith Cowriter, the operator and its other services continue. Closure source
- Dates checked
- Announced 18 Dec 2025 · Verified 10 Oct 2026
- AI functionality
- AI functionality source
- Launch
- The operator says a trial began in April 2020, without a day. April 26, 2021 is the separate worldwide formal-release milestone.
- Location
- Japan · Tokyo. The original product release names a Tokyo headquarters; the closure notice also gives a Tokyo corporate office. This records the operator city, not a product-team office or server site; no coordinates inferred. Location source