ElevenLabs vs OpenAI: Token Pricing, Speed & Intelligence

Full comparison of ElevenLabs and OpenAI — live token pricing, latency, throughput, context window, strengths, weaknesses, and best use cases. Updated July 2026.

ElevenLabs

Hyper-realistic AI voice and speech synthesis

ElevenLabs is the leading AI voice platform, offering text-to-speech and voice cloning APIs. Its multilingual v2 model supports 29 languages with near-human quality, and Flash v2.5 delivers ultra-low latency for real-time voice applications.

Text-to-speechVoice cloningAudiobook generationReal-time voice agents

Proprietary models

OpenAI

GPT-4o, o3, and the world's most widely-used AI API

OpenAI is the creator of the GPT model family and the ChatGPT product. Their API provides access to frontier models including GPT-4o, the o-series reasoning models, and the GPT-4.1 long-context family. Pricing is competitive for frontier-tier capability, with prompt caching available on most models.

CodingChatVisionReasoningAgents

Proprietary models

Key metrics

Cheapest input ($/1M)

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Cheapest output ($/1M)

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Peak throughput

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Best latency (TTFT)

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Intelligence score

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Context window

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Live token pricing

Strengths & weaknesses

ElevenLabs

Best-in-class voice quality

Ultra-low latency (Flash model)

29-language support

Voice/TTS only — no text generation

Per-character pricing can add up at scale

OpenAI

Largest ecosystem & third-party integrations

Best-in-class function calling & structured outputs

Prompt caching on all major models

o3/o4-mini reasoning models for complex tasks

1M+ token context on GPT-4.1

No open-weight models — full vendor lock-in

Output pricing is among the highest for frontier tier

Rate limits can be restrictive on lower tiers

Key differentiators

ElevenLabs

ElevenLabs Flash v2.5 delivers sub-300ms latency for real-time voice applications, making it the go-to choice for voice AI agents.

OpenAI

The most widely-integrated LLM API — virtually every AI framework and tool supports OpenAI natively.

Frequently asked questions

ElevenLabs FAQs

What is ElevenLabs used for?

ElevenLabs provides text-to-speech and voice cloning APIs. It is used for audiobook generation, voice agents, dubbing, and any application requiring high-quality synthetic speech.

How does ElevenLabs pricing work?

ElevenLabs charges per character of text converted to speech. Pricing varies by plan and model — Flash v2.5 is cheaper and faster, while Multilingual v2 offers higher quality.

OpenAI FAQs

How much does the OpenAI API cost?

GPT-4o costs $2.50/1M input tokens and $10/1M output tokens. GPT-4o-mini is $0.15/$0.60 per 1M tokens. Prompt caching cuts input costs by 50% on eligible requests.

What is the difference between GPT-4o and o3?

GPT-4o is a fast, multimodal model optimised for chat, vision, and coding. o3 is a reasoning model that uses chain-of-thought to solve complex problems — it is slower and more expensive but significantly more capable on math, science, and hard coding tasks.

Does OpenAI support prompt caching?

Yes. Prompt caching is available on GPT-4o, GPT-4.1, o3, and o4-mini. Cached input tokens are billed at 50% of the standard input price, making long-context and repeated-system-prompt workloads significantly cheaper.

Provider resources

ElevenLabs

Provider page Website Pricing Docs

OpenAI

Provider page Website Pricing Docs

ElevenLabs — Hyper-realistic AI voice and speech synthesis

ElevenLabs Flash v2.5 delivers sub-300ms latency for real-time voice applications, making it the go-to choice for voice AI agents.

OpenAI — GPT-4o, o3, and the world's most widely-used AI API

The most widely-integrated LLM API — virtually every AI framework and tool supports OpenAI natively.

Key strengths compared

ElevenLabs

▸Best-in-class voice quality
▸Ultra-low latency (Flash model)
▸29-language support

OpenAI

▸Largest ecosystem & third-party integrations
▸Best-in-class function calling & structured outputs
▸Prompt caching on all major models

Provider category context

ElevenLabs is a inference api, founded in 2022. OpenAI is a frontier lab, founded in 2015. ElevenLabs as an inference API provider hosts open-weight models — typically offering lower prices for equivalent capability tiers. OpenAI as a frontier lab trains and serves proprietary models with capabilities not available elsewhere.

How to choose between them

Choose ElevenLabs if you need best-in-class voice quality. Choose OpenAI if you need largest ecosystem & third-party integrations. For high-volume production workloads, run a cost comparison using the token pricing table above with your actual prompt/completion token ratio — the cheapest provider depends heavily on your input-to-output token ratio.