NVIDIA: Nemotron 3.5 Lightning (free) vs OpenAI: GPT-5.6 Luna (batch)
Based on weekly OpenRouter usage tracked by AI Tier List, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall — ahead of NVIDIA: Nemotron 3.5 Lightning (free) at #34. NVIDIA: Nemotron 3.5 Lightning (free) is cheaper on input tokens at Free/1M vs $0.10/1M for OpenAI: GPT-5.6 Luna (batch). OpenAI: GPT-5.6 Luna (batch) offers the larger context window at 1.1M tokens.
NVIDIA: Nemotron 3.5 Lightning (free) vs OpenAI: GPT-5.6 Luna (batch): which should you use?
Choose NVIDIA: Nemotron 3.5 Lightning (free) if…
- Cheaper to read — Free vs $0.10 per 1M input tokens, which is what dominates long-prompt and RAG workloads.
- Cheaper to write — Free vs $0.60 per 1M output tokens, the line item that decides generation-heavy costs.
- It is the newer model — released Aug 2026 against Jul 2026.
Choose OpenAI: GPT-5.6 Luna (batch) if…
- It sees more real traffic — #3 overall on OpenRouter's weekly ranking, against #34 for NVIDIA: Nemotron 3.5 Lightning (free).
- Bigger context window — 1.1M vs 1M tokens.
- It accepts file, image input, which NVIDIA: Nemotron 3.5 Lightning (free) does not.
Spec Comparison
| Spec | NVIDIA: Nemotron 3.5 Lightning (free) | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Author | nvidia | openai |
| Input price (per 1M tokens) | Free | $0.10 |
| Output price (per 1M tokens) | Free | $0.60 |
| Context window | 1M | 1.1M |
| Input modalities | text | file, image, text |
| Output modalities | text | text |
| AA Intelligence | — | — |
| AA Coding | — | — |
| AA Agentic | — | — |
| Released | Aug 2026 | Jul 2026 |
What NVIDIA: Nemotron 3.5 Lightning (free) and OpenAI: GPT-5.6 Luna (batch) actually cost to run
On a read-heavy job — 1M tokens in, 100K out — NVIDIA: Nemotron 3.5 Lightning (free) costs $0.00 and OpenAI: GPT-5.6 Luna (batch) costs $0.16.
Flip the shape — 100K in, 1M out — and it becomes $0.00 for NVIDIA: Nemotron 3.5 Lightning (free) versus $0.61 for OpenAI: GPT-5.6 Luna (batch).
Both figures are the published per-token rates multiplied out; caching and batch discounts are not included.
Usage Rank by Task
| Task | NVIDIA: Nemotron 3.5 Lightning (free) | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Overall | #34 | #3 |
| Multi-step Planning | — | #6 |
| Tool Dispatch | — | #4 |
| Web Search | — | #9 |
| Agent Workflows | — | #7 |
| Classification & Tagging | — | #3 |
| Debugging | — | #7 |
| DevOps Config | — | #6 |
| File Read/Write | — | #6 |
| Frontend UI | — | #5 |
| Code Implementation | — | #5 |
| Repo Analysis | — | #5 |
| Code Review & Security | — | #5 |
| SQL & Database | — | #5 |
| Content Writing | — | #8 |
About NVIDIA: Nemotron 3.5 Lightning (free) and OpenAI: GPT-5.6 Luna (batch)
NVIDIA: Nemotron 3.5 Lightning (free)
Built by nvidia · released Aug 2026 · 1M-token context
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...
OpenAI: GPT-5.6 Luna (batch)
Built by openai · released Jul 2026 · 1.1M-token context
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...
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- OpenAI: GPT-5.6 Luna (batch) vs DeepSeek: DeepSeek V4 Flash 0731
- OpenAI: GPT-5.6 Luna (batch) vs Tencent: Hy3
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FAQ
Which is better, NVIDIA: Nemotron 3.5 Lightning (free) or OpenAI: GPT-5.6 Luna (batch)?
Based on weekly OpenRouter usage tracked by AI Tier List, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall — ahead of NVIDIA: Nemotron 3.5 Lightning (free) at #34. NVIDIA: Nemotron 3.5 Lightning (free) is cheaper on input tokens at Free/1M vs $0.10/1M for OpenAI: GPT-5.6 Luna (batch). OpenAI: GPT-5.6 Luna (batch) offers the larger context window at 1.1M tokens.
Which is cheaper, NVIDIA: Nemotron 3.5 Lightning (free) or OpenAI: GPT-5.6 Luna (batch)?
NVIDIA: Nemotron 3.5 Lightning (free) is cheaper at Free per 1M input tokens. Output pricing: NVIDIA: Nemotron 3.5 Lightning (free) Free, OpenAI: GPT-5.6 Luna (batch) $0.60.
Is OpenAI: GPT-5.6 Luna (batch) still ahead of NVIDIA: Nemotron 3.5 Lightning (free) right now?
Yes. For the week of 2026-08-10, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall on OpenRouter usage against #34 for NVIDIA: Nemotron 3.5 Lightning (free). Ranks refresh weekly, and the verdict on this page flips if they cross.
Usage ranks are weekly data aggregated by OpenRouter. Prices are USD per 1M tokens.