# OpenAI: what AI models say (September 2026)

Source: Memetik Index, https://www.memetik.ai/vendors/openai
Website: https://developers.openai.com

OpenAI was named in 63 of 100 AI answers across 2 categories. Best position: LLM APIs, 100% answer share, ranked #1, named first in 66%.

## What OpenAI is

OpenAI provides an Audio API speech endpoint that converts text into spoken audio. It is for developers who need to add text-to-speech output to their products or services.

The endpoint receives a model, text input and a voice. It uses built-in voices to render the supplied text as speech. It also supports realtime audio streaming, allowing playback to begin before the complete audio file has been generated.

(From OpenAI's own website, read 2026-09-02.)

## By category

| Category | Rank | Answer share | Named first | Models |
|---|---|---|---|---|
| LLM APIs (https://www.memetik.ai/index/llm-apis) | #1 of 15 | 100% | 66% | GPT-5.6 Sol, ChatGPT, GPT-5.6 Luna, Claude Opus 5, Claude, Claude Fable 5, Gemini, Gemini 3.5 Flash, Perplexity, Sonar Reasoning Pro |
| AI voice generation (https://www.memetik.ai/index/ai-voice) | #7 of 17 | 26% | 0% | GPT-5.6 Sol, ChatGPT, GPT-5.6 Luna, Gemini, Gemini 3.5 Flash, Sonar Reasoning Pro |

## What the models said

> "Choose OpenAI if you want the most reliable, standard infrastructure with easy access to voice and image generation."
> — Gemini 3.5 Flash, LLM APIs

> "If it is primarily agents, coding, structured business workflows, or a broad SaaS assistant, start with OpenAI."
> — GPT-5.6 Luna, LLM APIs

> "Great for rapid prototyping: many developers report getting a working prototype with GPT-4/5 in under an hour."
> — Sonar Reasoning Pro, LLM APIs

> "Why I’d choose OpenAI first Strong general-purpose baseline: suitable for assistants, structured extraction, coding, RAG, and agents."
> — GPT-5.6 Sol, LLM APIs