NVIDIAText Generation/v1/ai/chat

Nemotron 3.5 Lightning API

Access Nemotron 3.5 Lightning through one API key. NVIDIA Open High-Throughput MoE.

NVIDIA Nemotron 3.5 Lightning is an open mixture-of-experts model from NVIDIA with 3B active parameters out of 30B total, suited for high-throughput agentic workloads and specialised tasks. Lightning is for throughput-bound agent pipelines and specialised tasks where an open model with a long context at very low cost is the goal.

Full Docs Get API Key

Takes 30 seconds.

Nemotron 3.5 Lightning API pricing

Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.

Token type	Price
Input	$0.10 / 1M tokens
Output	$0.30 / 1M tokens
Context window	262K tokens

What it costs	Per job	Per 1,000
Chat reply1K input + 500 output tokens	$0.0003	$0.25
RAG answer8K input + 800 output tokens	$0.001	$1.04
Agent step with tools30K input + 2K output tokens	$0.0036	$3.60
Long document summary100K input + 2K output tokens	$0.011	$10.60

4,900+

Developers

2.3M+

API calls served

184

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see Nemotron 3.5 Lightning respond in real time.

POST/v1/ai/chatnvidia/nemotron-3.5-lightning

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Nemotron 3.5 Lightning specs

Provider	NVIDIA
Model ID	nvidia/nemotron-3.5-lightning
Endpoint	/v1/ai/chat
Type	Text Generation
Context window	262K tokens
Max output	131K tokens
Reasoning	No
OpenAI-compatible	Yes — /v1/ai/chat/completions

How to get a Nemotron 3.5 Lightning API key

1
Create an account
Sign up at yepapi.com with Google or email. It takes about 30 seconds.
2
Create an API key
Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.
3
Call Nemotron 3.5 Lightning
Send a request to /v1/ai/chat with the x-api-key header and model "nvidia/nemotron-3.5-lightning".
4
Pay as you go
Usage is billed per request from your balance. Top up any amount; there is no subscription.

Strengths

✓

Open model

NVIDIA's open 30B MoE with 3B active parameters.

✓

High throughput

Designed for agentic workloads that run at scale.

✓

262K context, 131K output

Handles up to 262,144 input tokens and returns up to 131,072 output tokens per call.

✓

Very low cost

$0.10 per 262K input and $0.30 per 262K output tokens.

Quick start

Copy this snippet and start making calls with Nemotron 3.5 Lightning.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "nvidia/nemotron-3.5-lightning",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Nemotron 3.5 Lightning vs similar models

Every model below runs on the same API key — switch by changing the model ID.

Model	Provider	Price	Context
Nemotron 3.5 Lightning	NVIDIA	$0.10 in / $0.30 out per 1M	262K
Nemotron 3 Super	NVIDIA	$0 in / $0 out per 1M	262K
Nemotron 3.5 Super VL	NVIDIA	$0.22 in / $0.74 out per 1M	1.0M
Qwen3.7 Flash	Qwen	$0.04 in / $0.19 out per 1M	1M
Solar Mini 4	Upstage	$0.07 in / $0.30 out per 1M	524K
DeepSeek V4 Flash	DeepSeek	$0.13 in / $0.27 out per 1M	1.0M
Qwen 3.5 Flash	Qwen	$0.10 in / $0.38 out per 1M	1M
Seed 1.6 Flash	ByteDance	$0.11 in / $0.44 out per 1M	262K

Why use Nemotron 3.5 Lightning through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

Nemotron 3.5 Lightning API — pricing, context window & access

NVIDIA Nemotron 3.5 Lightning is an open mixture-of-experts model from NVIDIA with 3B active parameters out of 30B total, suited for high-throughput agentic workloads and specialised tasks. It pairs a 262,144-token context window with up to 131,072 output tokens per response, at $0.10 per 262K input and $0.30 per 262K output tokens through YepAPI.

Through YepAPI you call Nemotron 3.5 Lightning on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text.

What is Nemotron 3.5 Lightning?

NVIDIA Nemotron 3.5 Lightning is an open mixture-of-experts model from NVIDIA with 3B active parameters out of 30B total, suited for high-throughput agentic workloads and specialised tasks. It offers a 262,144-token context window and up to 131,072 output tokens at $0.10 / $0.30 per 262K tokens. It accepts text as input, handles up to 262,144 tokens of context and returns up to 131,072 output tokens per call.

Build with Nemotron 3.5 Lightning via YepAPI

YepAPI serves Nemotron 3.5 Lightning on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to nemotron-3.5-lightning (or the full nvidia/nemotron-3.5-lightning). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

Nemotron 3.5 Lightning API pricing — $0.10 / 262K input, $0.30 / 262K output

Nemotron 3.5 Lightning costs $0.10 per 262K input tokens and $0.30 per 262K output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs so you can see exactly what a 131,072-token response cost.

Nemotron 3.5 Lightning use cases

Lightning is for throughput-bound agent pipelines and specialised tasks where an open model with a long context at very low cost is the goal.

Start generating in 30 seconds

Pay per call, no subscriptions.

Get API Key

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

Nemotron 3.5 Lightning costs $0.10 per 1M input tokens and $0.30 per 1M output tokens through YepAPI, billed per request with no monthly fee. For example, a chat reply (1K input + 500 output tokens) costs about $0.0003.

Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for Nemotron 3.5 Lightning and every other model — no separate NVIDIA account or waitlist.

Use "nvidia/nemotron-3.5-lightning" as the model on /v1/ai/chat. The short alias "nemotron-3.5-lightning" also works.

Yes. Point the OpenAI SDK at https://api.yepapi.com/v1/ai with your YepAPI key and set model to "nvidia/nemotron-3.5-lightning". Streaming works the same way, so existing OpenAI code only needs the base URL and key changed.

Nemotron 3.5 Lightning supports a 262K token context window with up to 131K output tokens per request.