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REST API · No minimums · 99.99% Uptime SLA

Build AI Apps
10× Faster.

LLMs, speech-to-text, and speaker diarization — unified under one blazing-fast REST API. Stop wrestling with infrastructure. Start shipping products.

Get started Read the docs
api-quickstart.sh
# Call NexusAI in seconds
curl https://api.nexusai.com/v1/responses \
  -H "Authorization: Bearer sk-live-••••••••" \
  -d '{ "model": "standard",
     "messages": [{"role": "user", "content": "Hello!"}] }'
200 OK  ·  "Hello! How can I assist you today?"  ·  138ms
LLM Standard Speech-to-Text Diarization 99.99% Uptime Sub-200ms Latency Pay as you go REST API No minimums LLM Standard Speech-to-Text Diarization 99.99% Uptime Sub-200ms Latency Pay as you go REST API No minimums
0
% Uptime SLA
0
Avg response time

Simple, transparent
pricing. No surprises.

Pay only for what you use. No minimums, no hidden fees, no contracts. Scale from your first call to millions.

🧠
LLM Standard
Text Generation

Blazing-fast, production-grade LLM inference via REST. Power chatbots, summarizers, code assistants — anything language-driven.

$2.50
per 1M input tokens
$15.00 / 1M output tokens
* Mini and Pro tiers also available
  • Streaming support
  • Function & tool calling
  • System prompt control
  • JSON mode output
Start Building
🎙️
Audio Transcription
Speech-to-Text

Industry-leading accuracy for recorded audio and live streams. 90+ languages, auto-punctuation, word-level timestamps.

$0.22
per hour of audio
  • 90+ language detection
  • Real-time streaming
  • Punctuation & formatting
  • Word-level timestamps
Start Transcribing
👥
Diarization Add-on
Speaker ID

Know exactly who said what, and when. Ideal for meeting notes, call center analytics, and multi-speaker podcast transcripts.

+$0.03
per hour of audio
  • Multi-speaker detection
  • Speaker labels (A, B, C…)
  • Confidence scoring
  • Add to any transcription
Learn More
🔊
Text to Speech
Speech Synthesis

Turn any text into natural, expressive speech. Pick from 10 voices and steer tone, pace and emotion with plain-language voice instructions.

$4.00
per 1M input (text) tokens
$20.00 / 1M output (audio) tokens
  • 10 expressive voices
  • Custom voice instructions
  • MP3, WAV, FLAC & more
Start Converting

See it in action.
Build it in minutes.

01
AI Customer Support
Deploy an LLM-powered support agent that resolves tickets autonomously. Integrate with your help desk via a single REST call.
02
Meeting Transcription
Transcribe and summarize calls with full speaker identification. No manual notes, no integrations needed — just an API call.
03
Podcast Processing
Upload episodes and get back full transcripts, speaker-attributed quotes, and searchable content in seconds.
04
Text to Speech
Turn articles, replies and notifications into natural, expressive audio. Pick a voice, shape the tone with plain-language instructions, and stream the result.
nexusai — demo
// AI Support Agent — NexusAI LLM
U
My order #4821 hasn't arrived and it's been 8 days. I need help!
AI
Hi! Found order #4821 — it's at a regional hub and will arrive tomorrow before 6 PM. Want me to send a tracking link?
U
Yes please, and can I change the delivery address?
AI
Done! Address updated and tracking link sent to your email. Anything else? 🚀
✓ Resolved in 4s  ·  No human agent needed
// Meeting transcript — diarization enabled
[Sarah]  "Q3 numbers look strong — we're up 24% YoY."
[Marcus]  "Engineering shipped 3 features ahead of schedule."
[Priya]  "Can we revisit pricing before the board meeting?"
[Sarah]  "Good point — let's sync Friday."
3
Speakers detected
99.1%
Accuracy
// Podcast → show notes in 54.7 seconds
Episode Summary
Alex and Jamie explore how small teams can compete using cost-effective REST APIs and a lean deployment strategy.
Key Topics
#AI APIs #Startup #Cost Optimization #LLM
Processing Time
54.7s for 42 min episode
// Text → speech — POST /v1/audio/speech
Input Text
"Today is a wonderful day to build something people love!"
🔊 Voice: Nova Tone: Cheerful Format: MP3
0:04
✓ Generated in 0.6s  ·  10 voices · steerable tone & pace

Loved by developers
at every scale.

From solo projects to enterprise deployments — here's what our community is building.

★★★★★

"We replaced three separate AI vendors with NexusAI and cut our monthly costs by 60%. The latency is genuinely impressive — sub-200ms for most calls."

AM
Alex M.
CTO
Fintech startup, Series A
★★★★★

"The diarization add-on changed everything for our legal transcription platform. We went from 5 hours of manual work per client to zero. NPS jumped 40 points."

PK
Priya K.
Founder
LegalTech SaaS
★★★★★

"Integrated NexusAI into my podcast app in a single afternoon using the REST API. The docs are excellent and 99.99% uptime means I can actually sleep at night."

JR
Jordan R.
Indie Developer
Podcast platform, 80K users

Start building today.
Pay only as you grow.

No contracts, no minimums. Create an account and make your first API call in minutes.