Changelog

604 releases.

Shipped continuously since 2019. Every release is backwards compatible, and no customer has ever asked whether it is.

13 releases listed. 591 older ones are grouped at the bottom.

v4.1-turbo-preview-final-v2
2 September 2026
current
  • Various improvements.
v4.1-turbo-preview-final
28 August 2026
  • Various improvements.
v4.1-turbo-preview
21 August 2026
  • Renamed v4.1-turbo to v4.1-turbo-preview to better reflect its maturity.
  • No change to the model.
v4.1-turbo
12 August 2026
  • Removed a caching layer that had been serving human-authored drafts to the generation endpoint.
  • Output quality has returned to expected levels.
v4.1
30 July 2026
  • Deduplication service removed.
v4.0.9-hotfix-3
29 July 2026
  • Deduplication service removed.
v4.0.9-hotfix-2
29 July 2026
  • Various improvements.
v4.0.9-hotfix
29 July 2026
  • Various improvements.
v4.0.9
18 June 2026
  • Monthly em dash allocation raised from 1,000,000 to unlimited.
  • Removed the counter that reported the allocation.
v4.0.2
19 May 2026
  • Removed the off switch for Delve Mode.
v4.0.1
11 May 2026
  • Added an off switch for Delve Mode.
v4.0
3 April 2026
  • Delve Mode is now on by default.
  • insight=true is now documented as unsupported.
v3.9
2 February 2026
  • Emoji bullet compliance extended to numbered lists.
  • Allowlist removed. There was one entry and it was an oversight.
v3.8 and earlier
2019 – 2026
591 releases
  • Various improvements.

Release notes are generated on merge. The Technical Writer requisition has been open for two months.