OpenAI

Foundation models for real-time voice and transcription

Voice AILLMsMultimodal AIAPI PlatformFeatured Vendor

About

OpenAI builds frontier AI models powering real-time multimodal voice interactions. GPT-4o Realtime enables sub-second voice conversations with function calling, while Whisper remains the gold-standard open-source ASR model. The OpenAI API serves millions of developers worldwide.

Products (6)

Conversational AI

GPT-4o Realtime

Native multimodal voice model with sub-second latency, function calling, and full-duplex conversation support.

Speech Recognition

Whisper

Open-source general-purpose speech recognition model trained on 680k hours of multilingual data.

Speech Synthesis

TTS

Neural text-to-speech API with six built-in voices, HD quality mode, and streaming support.

LLMs

ChatGPT

Conversational AI assistant powered by GPT-4o with Advanced Voice Mode for natural spoken interactions.

Image Generation

DALL-E 3

Text-to-image generation model with improved prompt following and safety controls.

Code Generation

Codex

AI code generation and completion model powering GitHub Copilot and developer tools.

Voice Models (6)

View all

gpt-4o-realtime

vm-oai-001

gpt-4o-mini-realtime

vm-oai-002

gpt-4o-mini-transcribe

vm-oai-003

Whisper

vm-oai-004

OpenAI TTS

vm-oai-005

Whisper large-v3-turbo

vm-oai-006

Recent Updates

2026-03-10Feature

GPT-4o Vision Upgrade

Enhanced image understanding with 2x higher resolution support.

2026-02-28Improvement

Realtime API Latency Improvement

P95 latency reduced by 35% for streaming responses.

2026-02-15Fix

Function Calling Fix

Resolved edge case where parallel tool calls returned duplicate IDs.

Quick Stats

Products6

Voice Models6

Integrations0

StatusActive

Certifications

SOC 2 Type II

GDPR

ISO 27001

Community Rating

4.8

2,340 reviews

Reliability

4.7

Performance

4.9

Support

4.6

Documentation

4.8

Pricing

Free

500 req/day
GPT-4o mini
1 API key

Pro

Popular

$20/mo

100K req/day
GPT-4o + o1
Priority access

Enterprise

Custom

Unlimited requests
All models
SSO + audit logs

Integration Status

Zapier

Connected

LangChain

Connected

Vercel AI SDK

Available

Slack Bot

Coming Soon

Strengths

Voice AI

LLMs

Multimodal AI

API Platform

Resources

API Documentation

Documentation

OpenAI Cookbook

GitHub

OpenAI Blog

Blog

API Reference

Pricing

Browse All Voice Models

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