From d7fefbe828d73a698efc1c88da4393b96f529174 Mon Sep 17 00:00:00 2001 From: Claude Date: Tue, 14 Apr 2026 22:35:47 +0000 Subject: [PATCH 1/6] Rename Changelog to What's New - Update display name from "Changelog" to "What's New" in navigation - Change URL slug from /changelog to /whats-new - Update subscription box text to "Subscribe to the latest product updates" - Add redirect from /changelog to /whats-new for backwards compatibility - Update success_url in subscription form https://claude.ai/code/session_01PKuW5yr6fMdr6mSwX5Gchy --- fern/changelog/overview.mdx | 6 +++--- fern/docs.yml | 8 +++++--- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/fern/changelog/overview.mdx b/fern/changelog/overview.mdx index 6beee95dd..aedfd063f 100644 --- a/fern/changelog/overview.mdx +++ b/fern/changelog/overview.mdx @@ -1,14 +1,14 @@ --- -slug: changelog +slug: whats-new --- document.querySelector('input[type="email"]').focus()}>Get the (almost) daily changelog} + title={
document.querySelector('input[type="email"]').focus()}>Subscribe to the latest product updates
} icon="envelope" iconType="solid" >
{ diff --git a/fern/docs.yml b/fern/docs.yml index 7ba3888c4..be1bd9ce4 100644 --- a/fern/docs.yml +++ b/fern/docs.yml @@ -76,8 +76,8 @@ tabs: icon: fa-light fa-square-terminal slug: cli changelog: - display-name: Changelog - slug: changelog + display-name: What's New + slug: whats-new changelog: ./changelog icon: history mcp: @@ -856,7 +856,9 @@ redirects: - source: /developer-documentation destination: /introduction - source: /documentation/general/changelog - destination: /changelog + destination: /whats-new + - source: /changelog + destination: /whats-new - source: /api-reference/assistants/create-assistant destination: /api-reference/assistants/create - source: /api-reference/assistants/get-assistant From 0f581b0aa3f81a10351ee20dd8e7c11e9b7167c3 Mon Sep 17 00:00:00 2001 From: Claude Date: Tue, 14 Apr 2026 23:23:24 +0000 Subject: [PATCH 2/6] =?UTF-8?q?Add=20backfill=20changelog=20entry=20for=20?= =?UTF-8?q?Oct=202025=20=E2=80=93=20Mar=202026?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Covers platform features (Squads v2, Composer, Simulations, Monitoring, HIPAA/ZDR compliance, Consolidated Logs, Vapi Voices), new model/provider support (GPT-5, Claude 4.5-4.6, Gemini 3, Grok 4, Cartesia sonic-3, Inworld TTS, etc.), and developer tools (Structured Outputs, MCP improvements, Warm Transfer, hooks, encrypted tool args). https://claude.ai/code/session_01PKuW5yr6fMdr6mSwX5Gchy --- fern/changelog/2026-03-31.mdx | 70 +++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 fern/changelog/2026-03-31.mdx diff --git a/fern/changelog/2026-03-31.mdx b/fern/changelog/2026-03-31.mdx new file mode 100644 index 000000000..0539e5ff4 --- /dev/null +++ b/fern/changelog/2026-03-31.mdx @@ -0,0 +1,70 @@ +# What's New: October 2025 – March 2026 + +Here's a summary of everything we shipped from October 2025 through March 2026. + +--- + +## Platform + +1. **Squads v2**: Visual builder to simplify sophisticated multi-assistant orchestration with seamless handoffs between specialized agents. + +2. **Composer (Alpha)**: Intelligent assistant inside the dashboard that allows you to describe what you need through plain text prompts to help build, adjust, and debug voice agents. + +3. **Simulations (Alpha)**: Voice agent testing feature to build confidence through enabling systematic, AI-powered testing in specific scenarios with evaluation of outcomes. + +4. **Monitoring & Issues**: Automated call quality monitoring with trigger-based issue detection, alerting, and resolution suggestions. + +5. **HIPAA with Data Retention**: New compliance mode with private storage and in-dashboard toggle/purchase flow — available for additional cost. + +6. **Zero Data Retention**: Compliance mode that keeps context data during call as needed to execute tasks and retains no data afterwards. + +7. **Consolidated Logs**: Unified log viewing into a single page. + +8. **Vapi Voices**: 12 new ultra-realistic voices released, optimized for latency and cost with adjustable speed controls exposed. 8 legacy voices deprecated. + +--- + +## New Models & Provider Support + +### Transcriber Models (Speech-to-Text) + +- **Deepgram Nova-3 Languages** — Added Hebrew, Urdu, Tagalog, and Arabic bilingual support +- **Cartesia Transcriber** — ink-whisper +- **Soniox** — stt-rt-v4 + +### Intelligence Models (LLM) + +- **GPT-5 Family** — OpenAI's latest intelligence models, including GPT-5, 5-Mini, 5-Nano, 5.1, 5.2, 5.4, 5.4-Mini, 5.4-Nano +- **Claude 4.5–4.6** — Anthropic's latest intelligence models Sonnet 4.5, Opus 4.5, Opus 4.6, Sonnet 4.6 +- **Gemini 3 Flash** — Google's latest intelligence models +- **Grok 4 Fast** — Reasoning and non-reasoning variants +- **GPT Realtime Mini** + +### Voice Models (Text-to-Speech) + +- **Cartesia** — sonic-3, sonic-3-2026-01-12, sonic-3-2025-10-27 +- **WellSaid** — Caruso (new), legacy +- **Inworld** — inworld-tts-1 (REST, original), inworld-tts-1.5-max (WebSocket, $10/M chars), inworld-tts-1.5-mini (WebSocket, $5/M chars) +- **ElevenLabs Scribe v2** + +--- + +## Developer Tools & API + +1. **Structured Outputs Improvements**: Updates to our AI-powered analysis and data extraction tool, including transient structured outputs, audio-based extraction, and regex extraction. + +2. **SIP Request Tool + DTMF over SIP INFO** + +3. **Variable Passing Between Tool Calls** + +4. **Encrypted Tool Arguments** + +5. **Low Confidence Speech Hook** + +6. **Time Elapsed Hook** + +7. **`assistant.speechStarted` Event** + +8. **MCP Improvements** — Bearer auth, `$ref` dereferencing, child tool messages/discovery + +9. **Warm Transfer Improvements** — SIP support, caller ID, context engineering, variable filling From 9e43e4c9123e0c08e52a175761765485792aea9a Mon Sep 17 00:00:00 2001 From: Claude Date: Tue, 14 Apr 2026 23:27:02 +0000 Subject: [PATCH 3/6] Update display name to "What's New?" https://claude.ai/code/session_01PKuW5yr6fMdr6mSwX5Gchy --- fern/docs.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fern/docs.yml b/fern/docs.yml index be1bd9ce4..fab208dc8 100644 --- a/fern/docs.yml +++ b/fern/docs.yml @@ -76,7 +76,7 @@ tabs: icon: fa-light fa-square-terminal slug: cli changelog: - display-name: What's New + display-name: What's New? slug: whats-new changelog: ./changelog icon: history From 0679fbbf8aca5f6b4161584fd89ab0f9137b7e57 Mon Sep 17 00:00:00 2001 From: Claude Date: Wed, 15 Apr 2026 03:36:53 +0000 Subject: [PATCH 4/6] Standardize formatting in backfill changelog entry Use consistent numbered lists with **Title**: Description pattern throughout all sections. Remove mixed bullet/numbered lists and inline code formatting that caused font inconsistencies. https://claude.ai/code/session_01PKuW5yr6fMdr6mSwX5Gchy --- fern/changelog/2026-03-31.mdx | 49 +++++++++++++++++++++-------------- 1 file changed, 29 insertions(+), 20 deletions(-) diff --git a/fern/changelog/2026-03-31.mdx b/fern/changelog/2026-03-31.mdx index 0539e5ff4..897f0d3d8 100644 --- a/fern/changelog/2026-03-31.mdx +++ b/fern/changelog/2026-03-31.mdx @@ -28,24 +28,33 @@ Here's a summary of everything we shipped from October 2025 through March 2026. ### Transcriber Models (Speech-to-Text) -- **Deepgram Nova-3 Languages** — Added Hebrew, Urdu, Tagalog, and Arabic bilingual support -- **Cartesia Transcriber** — ink-whisper -- **Soniox** — stt-rt-v4 +1. **Deepgram Nova-3 Languages**: Added Hebrew, Urdu, Tagalog, and Arabic bilingual support. + +2. **Cartesia Transcriber**: ink-whisper. + +3. **Soniox**: stt-rt-v4. ### Intelligence Models (LLM) -- **GPT-5 Family** — OpenAI's latest intelligence models, including GPT-5, 5-Mini, 5-Nano, 5.1, 5.2, 5.4, 5.4-Mini, 5.4-Nano -- **Claude 4.5–4.6** — Anthropic's latest intelligence models Sonnet 4.5, Opus 4.5, Opus 4.6, Sonnet 4.6 -- **Gemini 3 Flash** — Google's latest intelligence models -- **Grok 4 Fast** — Reasoning and non-reasoning variants -- **GPT Realtime Mini** +1. **GPT-5 Family**: OpenAI's latest intelligence models, including GPT-5, 5-Mini, 5-Nano, 5.1, 5.2, 5.4, 5.4-Mini, 5.4-Nano. + +2. **Claude 4.5–4.6**: Anthropic's latest intelligence models Sonnet 4.5, Opus 4.5, Opus 4.6, Sonnet 4.6. + +3. **Gemini 3 Flash**: Google's latest intelligence models. + +4. **Grok 4 Fast**: Reasoning and non-reasoning variants. + +5. **GPT Realtime Mini**: OpenAI's lightweight realtime model. ### Voice Models (Text-to-Speech) -- **Cartesia** — sonic-3, sonic-3-2026-01-12, sonic-3-2025-10-27 -- **WellSaid** — Caruso (new), legacy -- **Inworld** — inworld-tts-1 (REST, original), inworld-tts-1.5-max (WebSocket, $10/M chars), inworld-tts-1.5-mini (WebSocket, $5/M chars) -- **ElevenLabs Scribe v2** +1. **Cartesia**: sonic-3, sonic-3-2026-01-12, sonic-3-2025-10-27. + +2. **WellSaid**: Caruso (new), legacy. + +3. **Inworld**: inworld-tts-1 (REST, original), inworld-tts-1.5-max (WebSocket, $10/M chars), inworld-tts-1.5-mini (WebSocket, $5/M chars). + +4. **ElevenLabs Scribe v2**: Latest version of ElevenLabs speech-to-text. --- @@ -53,18 +62,18 @@ Here's a summary of everything we shipped from October 2025 through March 2026. 1. **Structured Outputs Improvements**: Updates to our AI-powered analysis and data extraction tool, including transient structured outputs, audio-based extraction, and regex extraction. -2. **SIP Request Tool + DTMF over SIP INFO** +2. **SIP Request Tool + DTMF over SIP INFO**: Send SIP requests and DTMF tones via SIP INFO messages during calls. -3. **Variable Passing Between Tool Calls** +3. **Variable Passing Between Tool Calls**: Pass output variables from one tool call as input to subsequent tool calls. -4. **Encrypted Tool Arguments** +4. **Encrypted Tool Arguments**: Encrypt sensitive tool arguments to protect data in transit. -5. **Low Confidence Speech Hook** +5. **Low Confidence Speech Hook**: Hook that triggers when the transcriber returns low-confidence speech results. -6. **Time Elapsed Hook** +6. **Time Elapsed Hook**: Hook that triggers at specified time intervals during a call. -7. **`assistant.speechStarted` Event** +7. **assistant.speechStarted Event**: New event fired when the assistant begins speaking. -8. **MCP Improvements** — Bearer auth, `$ref` dereferencing, child tool messages/discovery +8. **MCP Improvements**: Bearer auth, $ref dereferencing, child tool messages/discovery. -9. **Warm Transfer Improvements** — SIP support, caller ID, context engineering, variable filling +9. **Warm Transfer Improvements**: SIP support, caller ID, context engineering, variable filling. From 22393d57370778f65d0e0e5de24c0861e10913f4 Mon Sep 17 00:00:00 2001 From: Claude Date: Wed, 15 Apr 2026 17:13:14 +0000 Subject: [PATCH 5/6] Escape dollar signs in Inworld pricing to prevent LaTeX math rendering MDX was interpreting $10/M...$5/M as a math expression, causing the text to render in an italic math font. https://claude.ai/code/session_01PKuW5yr6fMdr6mSwX5Gchy --- fern/changelog/2026-03-31.mdx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fern/changelog/2026-03-31.mdx b/fern/changelog/2026-03-31.mdx index 897f0d3d8..06f5986ae 100644 --- a/fern/changelog/2026-03-31.mdx +++ b/fern/changelog/2026-03-31.mdx @@ -52,7 +52,7 @@ Here's a summary of everything we shipped from October 2025 through March 2026. 2. **WellSaid**: Caruso (new), legacy. -3. **Inworld**: inworld-tts-1 (REST, original), inworld-tts-1.5-max (WebSocket, $10/M chars), inworld-tts-1.5-mini (WebSocket, $5/M chars). +3. **Inworld**: inworld-tts-1 (REST, original), inworld-tts-1.5-max (WebSocket, \$10/M chars), inworld-tts-1.5-mini (WebSocket, \$5/M chars). 4. **ElevenLabs Scribe v2**: Latest version of ElevenLabs speech-to-text. From 5b4a39283ea917db8db882e4a78997f4f536e912 Mon Sep 17 00:00:00 2001 From: Claude Date: Wed, 15 Apr 2026 17:13:39 +0000 Subject: [PATCH 6/6] Update intro wording to "major items shipped" https://claude.ai/code/session_01PKuW5yr6fMdr6mSwX5Gchy --- fern/changelog/2026-03-31.mdx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fern/changelog/2026-03-31.mdx b/fern/changelog/2026-03-31.mdx index 06f5986ae..8a94351de 100644 --- a/fern/changelog/2026-03-31.mdx +++ b/fern/changelog/2026-03-31.mdx @@ -1,6 +1,6 @@ # What's New: October 2025 – March 2026 -Here's a summary of everything we shipped from October 2025 through March 2026. +Here's a summary of major items shipped from October 2025 through March 2026. ---