Whats New for the week of 10-5-26

fern/changelog/2026-10-05.mdx

@@ -0,0 +1,15 @@
+# What's New: Week of October 5, 2026
+
+1. **OpenAI GPT-6 Luna**: OpenAI's [GPT-6 Luna](/providers/model/openai) (`gpt-6-luna`) is now available for assistants in the API and dashboard, with model-specific pricing, reasoning support, and fast service tier.
+
+2. **ElevenLabs v4 Turbo**: The [`eleven_v4_turbo`](/providers/voice/elevenlabs) voice model is now available in the dashboard voice picker and the API.
+
+3. **Deepgram nova-3-pharma**: Deepgram's [`nova-3-pharma`](/providers/transcriber/deepgram) transcription model is now available for assistants.
+
+4. **Soniox low-confidence filter**: You can now set a [confidence threshold](/providers/transcriber/soniox#low-confidence-filter) on the Soniox transcriber to discard low-confidence transcripts, from the transcriber Advanced settings and via the API.
+
+5. **Simulation latency expectations**: Simulations can now [set latency limits](/observability/simulations-advanced#set-latency-limits) for model, voice, and turn timing, fail runs that exceed them, and show measured latency results.
+
+6. **Fixes and Improvements**:
+    - **Visual prompt editor**: The visual prompt editor no longer alters nested or multi-line Liquid tags or section headings when switching modes or saving.
+    - **Chat handoff variables**: Chat squad handoffs now extract variables from the chat conversation instead of overwriting valid handoff values.

fern/providers/model/openai.mdx

@@ -32,6 +32,7 @@ For additional API configuration options, review the [`OpenAIModel` fields](/api
 
 | Model | Model ID |
 | --- | --- |
+| GPT 6 Luna | `gpt-6-luna` |
 | GPT 5.6 Sol | `gpt-5.6-sol` |
 | GPT 5.6 Terra | `gpt-5.6-terra` |
 | GPT 5.6 Luna | `gpt-5.6-luna` |
@@ -63,7 +64,7 @@ For latency-sensitive assistants, you can request OpenAI's faster processing tie
 | `auto` | Uses the service tier configured for your OpenAI project. |
 | `default` | Standard processing and billing. |
 
-`serviceTier` applies only to models that support fast processing: `gpt-5.6-sol`, `gpt-5.6-terra`, `gpt-5.6-luna`, and `gpt-5.5`. It is ignored for other models. When unset, Vapi uses the service tier configured for your OpenAI project. See [OpenAI's pricing](https://openai.com/api/pricing) for fast-tier rates.
+`serviceTier` applies only to models that support fast processing: `gpt-6-luna`, `gpt-5.6-sol`, `gpt-5.6-terra`, `gpt-5.6-luna`, and `gpt-5.5`. It is ignored for other models. When unset, Vapi uses the service tier configured for your OpenAI project. See [OpenAI's pricing](https://openai.com/api/pricing) for fast-tier rates.
 
 ```bash
 curl -X PATCH "https://api.vapi.ai/assistant/ASSISTANT_ID" \

fern/providers/transcriber/deepgram.mdx

@@ -35,6 +35,7 @@ For additional API configuration options, review the [`DeepgramTranscriber` fiel
 | Nova 3 | `nova-3` |
 | Nova 3 General | `nova-3-general` |
 | Nova 3 Medical | `nova-3-medical` |
+| Nova 3 Pharma | `nova-3-pharma` |
 | Nova 2 | `nova-2` |
 | Nova 2 General | `nova-2-general` |
 | Nova 2 Meeting | `nova-2-meeting` |

fern/providers/transcriber/soniox.mdx

@@ -108,6 +108,25 @@ The following languages are currently accepted by Vapi for Soniox. See [Soniox s
 | Vietnamese | `vi` |
 | Welsh | `cy` |
 
+## Low-confidence filter
+
+You can discard transcripts that Soniox returns with low confidence, so the assistant does not respond to uncertain speech. In the dashboard, open the transcriber **Advanced settings** and turn on the **Low-confidence filter** to set a threshold. Via the API, set `transcriber.confidenceThreshold` to a value between `0` and `1`.
+
+```bash
+curl -X PATCH "https://api.vapi.ai/assistant/ASSISTANT_ID" \
+  -H "Authorization: Bearer $VAPI_API_KEY" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "transcriber": {
+      "provider": "soniox",
+      "model": "stt-rt-v5",
+      "confidenceThreshold": 0.4
+    }
+  }'
+```
+
+Confidence is the mean of the per-token scores for the transcript. Any final transcript below the threshold is discarded. When `confidenceThreshold` is unset, nothing is discarded by this setting. See the [`SonioxTranscriber` fields](/api-reference/assistants/create#request.body.transcriber.SonioxTranscriber) for the full configuration.
+
 ## Related
 
 - Configure a [transcriber fallback plan](/customization/transcriber-fallback-plan).

fern/providers/voice/elevenlabs.mdx

@@ -46,6 +46,7 @@ For additional API configuration options, review the [`ElevenLabsVoice` fields](
 | Eleven Flash v2.5 | `eleven_flash_v2_5` |
 | Eleven Multilingual v2 | `eleven_multilingual_v2` |
 | Eleven v3 | `eleven_v3` |
+| Eleven v4 Turbo | `eleven_v4_turbo` |
 
 ### Configuration options