Overview
NVIDIA Nemotron 3.5 Lightning is an open mixture-of-experts model from NVIDIA, with 3B active parameters out of 30B total. It is suited for high-throughput agentic workloads and specialized tasks that...
Our take
For developers building high-throughput agentic workflows, particularly those requiring extensive context, NVIDIA's Nemotron 3.5 Lightning offers a distinct proposition. Unlike general-purpose chatbots such as Claude or ChatGPT, this open mixture-of-experts model, with 3B active parameters out of 30B total, is engineered for specialised tasks. Its 1,000,000-token context window is notably larger than many alternatives, allowing for the processing of substantial amounts of information. The inclusion of reasoning via chain-of-thought and support for tool/function calling further positions it for agent-style applications. As a text-only model, it does not process image input, which may limit its utility for certain multimodal projects. Completely free to use via the OpenRouter API, it is best suited for developers and researchers who need a cost-effective solution for complex, text-based reasoning and automation, particularly those engaging with large datasets.
How NVIDIA: Nemotron 3.5 Lightning stacks up
Among the 359 chatbots & llms tools in our directory, it ranks #176 of 354 on quality (7.8/10), 2% below the 354-tool average of 8.0, and its $0.07/1M input-token rate is in the budget end — 97% cheaper than the 344-model average of $2.02/1M.
Weighing quality against cost, NVIDIA: Nemotron 3.5 Lightning's cost-per-quality-point of $0.01 places it in the top 9% for value among chatbots & llms tools.
NVIDIA: Nemotron 3.5 Lightning in depth
NVIDIA: Nemotron 3.5 Lightning, built by NVIDIA, sits in the chatbots & llms space and is free to start, with paid plans from $0.07/1M tokens. Our editors rate it 7.8 out of 10 based on capability, ecosystem and value. It handles a context window of 262,144 tokens.
On the feature side, NVIDIA: Nemotron 3.5 Lightning brings 262,144-token context window, reasoning / chain-of-thought, tool / function calling and structured (json) outputs. These are the capabilities that most shape day-to-day use and separate it from thinner alternatives.
Its biggest strength is completely free to use via the openrouter api, while the main trade-off to weigh is that text-only: does not accept image input. Keep both in mind when deciding whether it fits your workflow.
NVIDIA: Nemotron 3.5 Lightning is most often chosen for research and writing. If that matches your goals, it's a strong candidate to shortlist.
Key features
- ✓262,144-token context window
- ✓Reasoning / chain-of-thought
- ✓Tool / function calling
- ✓Structured (JSON) outputs
Pricing
Pros
- +Completely free to use via the OpenRouter API
- +Built-in reasoning (chain-of-thought) mode for harder problems
- +Supports tool / function calling for agent-style workflows
- +Can return structured JSON output for reliable parsing
Cons
- −Text-only: does not accept image input
Who should use NVIDIA: Nemotron 3.5 Lightning
- →Anyone looking for a chatbots & llms tool from NVIDIA.
- →Teams and individuals focused on research and writing.
- →Users who want to try before they buy — there's a free tier.
- →People who value completely free to use via the openrouter api.
Who should look elsewhere
- →Those for whom text-only: does not accept image input is a dealbreaker.
Best for
10 Best NVIDIA: Nemotron 3.5 Lightning Alternatives in 2026
NVIDIA: Nemotron 3.5 Lightning is a strong chatbots & llms tool, but it is not the only option. Whether you are after a lower price, different features or a better fit for your workflow, here are the 10 best alternatives to NVIDIA: Nemotron 3.5 Lightning, ranked and compared.
Anthropic
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OpenAI
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Google DeepMind
Gemini is Google's natively multimodal model family, deeply integrated across Search, Workspace, Android and the Pixel…
Z.AI
GLM-5.3-FlashX is the high-speed variant of Z.ai's GLM-5.3-Flash, a native multimodal model delivering inference speeds…
Sakana AI
Fugu Ultra v2 is the higher-performance model in Sakana AI's Fugu family.
Sakana AI
Fugu Max is the cost-performance model in Sakana AI's Fugu family. Rather than a single monolithic model, Fugu is a…
DeepSeek
DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal…
OpenAI
GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work. It is suited for advanced analysis, software…
OpenAI
GPT-6 Astra Pro is the same underlying model as [GPT-6 Astra](https://openrouter.ai/openai/gpt-6-astra), served with…
Qwen
Qwen3.8 Max 0902 is an updated snapshot of Qwen3.8 Max from Alibaba's Qwen team.
NVIDIA: Nemotron 3.5 Lightning vs top alternatives
A side-by-side look at how NVIDIA: Nemotron 3.5 Lightning stacks up against its closest rivals.
| Feature | NVIDIA: Nemotron 3.5 LightningNVIDIA | ClaudeAnthropic | ChatGPTOpenAI | GeminiGoogle DeepMind |
|---|---|---|---|---|
| Quality score | 7.8 / 10 | 9.6 / 10 | 9.5 / 10 | 9.2 / 10 |
| Starting price | $0.07/1M tokens | $20/mo | $20/mo | $20/mo |
| Free tier | Yes — Free variant available | Yes — Free tier available | Yes — Free tier available | Yes — Free tier available |
| API input price | $0.07 / 1M tokens | $10 / 1M tokens | $10 / 1M tokens | $0.75 / 1M tokens |
| API output price | $0.2 / 1M tokens | $50 / 1M tokens | $50 / 1M tokens | $3.75 / 1M tokens |
| Speed | — | Fast | Fast | Fast |
| Context window | 262,144 tokens | 200K tokens | 128K tokens | 1M-2M tokens |
| Categories | Chatbots & LLMs | Chatbots & LLMs, Coding, Writing | Chatbots & LLMs, Coding, Writing | Chatbots & LLMs, Coding, Writing |
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Frequently asked questions
Q. Is NVIDIA: Nemotron 3.5 Lightning free?
Yes — NVIDIA: Nemotron 3.5 Lightning offers a free tier. Paid plans start at $0.07/1M tokens.
Q. How much does NVIDIA: Nemotron 3.5 Lightning cost?
NVIDIA: Nemotron 3.5 Lightning starts at $0.07/1M tokens. API usage is around $0.07 per 1M input tokens and $0.2 per 1M output tokens.
Q. What is NVIDIA: Nemotron 3.5 Lightning best for?
NVIDIA: Nemotron 3.5 Lightning is best suited to research and writing, within the chatbots & llms category.
Q. What are the best NVIDIA: Nemotron 3.5 Lightning alternatives?
Popular alternatives to NVIDIA: Nemotron 3.5 Lightning include Claude, ChatGPT, Gemini and Z.ai: GLM 5.3 FlashX. Each trades off price, quality and ecosystem differently.
Q. Is there a free alternative to NVIDIA: Nemotron 3.5 Lightning?
Yes. Claude, ChatGPT, Gemini offer a free tier, making them good starting points if you want to avoid an upfront subscription.
Q. Why switch from NVIDIA: Nemotron 3.5 Lightning?
Common reasons include pricing, specific feature gaps (Text-only: does not accept image input), data-privacy requirements, or simply wanting a tool that fits your stack better.
How we rate AI tools
Our quality score weighs capability on real tasks, breadth of features and integrations, pricing and value, and how actively the tool is maintained. Scores are editorial guidance, not benchmarks — always trial a tool on your own workflow before committing. Pricing and features change frequently, so verify current details on the official site.
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