generated: '2026-08-05'
method: searched
source: https://syllable.ai/release-notes/
url: https://syllable.ai/release-notes/
scheme: date-based
scheme_pattern: vYY.M.DD
current_version: v26.7.30
window: recent (2026-06-27 through 2026-07-30)
note: >-
  Syllable publishes a dated product release-notes stream on its marketing site rather
  than a versioned API changelog in the docs. Entries are platform-wide (console, agents,
  telephony, insights) and mix fixes with additions; breaking-change callouts are not a
  separate section. The API itself is pinned at /api/v1 and the OpenAPI carries
  info.version 0.0.3, so release dates — not API versions — are the moving part.
  Separately, the Go CLI is semver'd and its v2.0.0 release documents explicit breaking
  changes (see cli/syllable-cli.yml).
entries:
- version: v26.7.30
  date: '2026-07-30'
  breaking: false
  highlights:
  - Campaign setup shows only channel sources compatible with the selected mode
  - Agent creation works immediately in newly created sub-organizations
  - Contact alias search and improved outbound session timestamps
- version: v26.7.28
  date: '2026-07-28'
  breaking: false
  highlights:
  - Pin an agent to a specific prompt version or follow the latest automatically
  - Richer voice testing capabilities
  - New Insights workflow actions
- version: v26.7.23
  date: '2026-07-23'
  breaking: false
  highlights:
  - Step Tool cards preview what each step says and which tools it calls
  - Review workflows at a glance without opening individual steps
- version: v26.7.21
  date: '2026-07-21'
  breaking: false
  highlights:
  - Voice groups can be duplicated from the table or the details page
  - Sessions view highlights related transcript and inspect items on hover
  - Responsive Dialogue no longer repeats replies
- version: v26.7.16
  date: '2026-07-16'
  breaking: false
  highlights:
  - New voicemail detection mode for outbound calls
  - Rule editor filters outbound campaign calls by line type, carrier and country code
- version: v26.7.14
  date: '2026-07-14'
  breaking: false
  highlights:
  - Agents automatically use the latest model version
  - Auto-created Syllable Voice/SMS channels include Responsive Dialogue by default
  - Custom-role permission errors resolved
- version: v26.7.7
  date: '2026-07-07'
  breaking: false
  highlights:
  - SMS channel targets creatable in the UI
  - Step Tool steps can be duplicated
  - User transcripts captured for outbound sessions ending before speech recognition
- version: v26.6.27
  date: '2026-06-27'
  breaking: false
  highlights:
  - Redesigned Sessions page with full session timeline
  - Responsive Dialogue testing toggle for voice-mode agents
  - Prompt Update API temperature validation
x-evidence:
  fetched: '2026-08-05'
  url: https://syllable.ai/release-notes/
  http_status: 200