Microsoft makes its own Azure Realtime speech-to-speech model generally available in the Voice Live API
Confirmed
The takeaway
On 2026-07-25 Microsoft made its in-house “Azure Realtime” speech-to-speech model (API id azure-realtime) generally available in the Azure Voice Live API.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 2 of 5
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 Astra86 days after its cutoff
- Claude Opus 5.525 days after its cutoff
- Gemini 4 Hydrogen116 days after its cutoff
- Grok 4.755 days after its cutoff
None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 25 days before it.
Key facts
- Azure Realtime GA 2026-07-25: 34 locale-native voices across 11 languages; ‘about 100 ms lower latency than GPT Realtime 1.5’; most voices ‘on par with or better than competing offerings’ (Microsoft)
- Voice Live API version 2026-07-15 GA (default for SDKs): 12 azure-realtime native voices, parallel tool calls, streaming text input, hosted-agent passthrough
- Voice Live service: GA November 2025; events mostly match the Azure OpenAI Realtime API; noise suppression, echo cancellation, semantic end-of-turn detection, avatars, function calling, MCP servers (GA April 2026)
- Model menu (Sept 2026): gpt-realtime-2.1 (+mini, datazone), gpt-realtime-1.5, gpt-5.6-terra/luna, gpt-5.x, gpt-4.1/4o, phi4-mm-realtime, azure-realtime; tiers Pro/Standard/Lite by model
- MAI-Transcribe is a preview speech-recognition option in Voice Live (since April 2026); MAI-Transcribe-2 and MAI-Voice-2 plug in as input/output
What happened
Microsoft had previewed an in-house speech-to-speech model (“Azure Realtime”) around Build 2026 alongside the Voice Live API. It reached GA in July 2026 as an alternative to OpenAI’s gpt-realtime models inside Microsoft’s managed voice-agent service.
Why it matters
Microsoft now offers a first-party realtime voice model next to OpenAI’s inside its own voice-agent platform. Together with MAI-Transcribe and MAI-Voice, this is another sign that Microsoft is building a speech stack less dependent on OpenAI. Per-minute pricing and independent benchmarks for azure-realtime were not found.
Sources
4 sources from 3 sites. Numbers match the chips in the text.
4 sources: 4 primary
Primary
- Microsoft Learn - Voice Live release notesgithub.com, docs
- Microsoft Learn - Voice Live API overview (models, pricing tiers)learn.microsoft.com, docs
- Microsoft Tech Community - Azure Speech at Build 2026: powering voice agentstechcommunity.microsoft.com, official
- Microsoft Learn - MAI-Transcribe in Speech servicelearn.microsoft.com, docs
Changes
- Filed