GPT-Realtime-2, GPT-Translate, and new Whisper: OpenAI's new SOTA realtime voice APIs
OpenAI has released a suite of new real-time voice and audio APIs including GPT-Realtime-2, a GPT-Translate model, and an updated Whisper, all positioned as state-of-the-art for real-time voice applications. The releases appear to be part of a broader push to deploy GPT-5 capabilities across multiple product surfaces. Coverage comes from the Latent Space AI News digest, which aggregates and contextualizes the announcements.
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OpenAI Updates Audio Models That Reason, Transcribe, and Translate
OpenAI introduced three new audio models in its Realtime API: GPT-Realtime-2 (speech-to-speech with five configurable reasoning effort levels), GPT-Realtime-Translate (70+ input languages), and GPT-Realtime-Whisper (transcription). GPT-Realtime-2 operates as an end-to-end audio model including reasoning, with latency ranging from 1.12 seconds at minimal effort to 2.33 seconds at high effort. Benchmark results are mixed: it leads Scale AI's Audio MultiChallenge and Artificial Analysis Conversational Dynamics but trails Step-Audio R1.1 Realtime and Grok Voice Think Fast 1.0 on speech reasoning and agentic tasks. The configurable reasoning-latency tradeoff is positioned as a key differentiator for voice agent applications.
Introducing ChatGPT and Whisper APIs
OpenAI announced the release of dedicated APIs for ChatGPT (gpt-3.5-turbo) and Whisper, enabling developers to integrate conversational AI and speech-to-text capabilities into their applications. The ChatGPT API offered significant cost reductions compared to existing GPT-3.5 endpoints. This marked a major step in OpenAI's platform strategy, opening programmatic access to its most widely used consumer models.
Introducing gpt-realtime and Realtime API updates
OpenAI is releasing a new speech-to-speech model called gpt-realtime alongside expanded Realtime API capabilities. New features include MCP server support, image input, and SIP phone calling support. These updates extend the Realtime API's utility for voice-driven and multimodal agent applications.
Advancing voice intelligence with new models in the API
OpenAI is releasing new realtime voice models via its API with capabilities spanning reasoning, translation, and transcription. The announcement targets developers building voice-enabled applications and represents an expansion of OpenAI's voice intelligence offerings beyond the existing Realtime API. The models are positioned to enable more natural and intelligent voice experiences in production deployments.
Introducing Whisper
OpenAI introduced Whisper, an open-source automatic speech recognition (ASR) system trained on 680,000 hours of multilingual and multitask supervised data collected from the web. The model demonstrates strong robustness to accents, background noise, and technical language, approaching human-level accuracy in English transcription. Whisper supports transcription in multiple languages as well as translation to English, and the weights and inference code were released publicly.
Introducing the Realtime API
OpenAI has launched the Realtime API, enabling developers to build low-latency speech-to-speech experiences directly into their applications. The API provides native audio input and output without requiring separate transcription and text-to-speech steps. This represents a significant infrastructure offering for voice-enabled AI applications, moving beyond text-based API paradigms.
GPT-4 API General Availability and Completions API Deprecation Plan
OpenAI has announced general availability of the GPT-4 API, alongside GPT-3.5 Turbo, DALL·E, and Whisper APIs. Concurrently, OpenAI is releasing a deprecation plan for older models in the Completions API, which are set to retire at the beginning of 2024. This marks a significant milestone in OpenAI's API product lifecycle, transitioning GPT-4 from limited access to broad developer availability.
How OpenAI Delivers Low-Latency Voice AI at Scale
OpenAI published a technical overview of how it rebuilt its WebRTC stack to support real-time voice AI at global scale. The post covers infrastructure choices enabling low-latency audio delivery and conversational turn-taking. This represents a production-grade engineering disclosure about the systems underpinning OpenAI's voice products.