SpaceXAI: Grok 4.5 vs NVIDIA: Nemotron 3 Nano Omni (free)
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| SpaceXAI: Grok 4.5 | NVIDIA: Nemotron 3 Nano Omni (free) | |
|---|---|---|
| Vendor | x-ai | nvidia |
| Quality Score | 100 | 100 |
| Benchmark Score | 91.2 | - |
| Input Price | $2.00/M | Free |
| Output Price | $6.00/M | Free |
| Context Window | 500,000 | 256,000 |
| Max Output | 450,000 | 65,536 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | - |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | ✓ |
| Benchmark Scores | ||
| ai_index | 88.8 | - |
| ai_index_agentic | 75.4 | - |
| ai_index_coding | 100.0 | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Nemotron 3 Nano Omni (free) costs $0 and Grok 4.5 costs $3.50, so Nemotron 3 Nano Omni (free) is free for the same work.
Grok 4.5 reads up to 500,000 tokens at once, roughly 750 pages of text, against about 384 pages for Nemotron 3 Nano Omni (free).
Only Grok 4.5 offers structured output; only Nemotron 3 Nano Omni (free) offers audio input and video input.
Across the 20 tasks where they differ, Grok 4.5 scores higher on 17 (SQL Generation, Code Review, Code Refactoring and others), Nemotron 3 Nano Omni (free) on 3 (Code Completion, Bulk Data Labeling, Short-Form Summarization).
Grok 4.5 was released in July 2026 and Nemotron 3 Nano Omni (free) in April 2026.
Pick Grok 4.5 if you need long documents, structured output or the stronger all-round task scores; pick Nemotron 3 Nano Omni (free) if you need lower cost, audio input or video input.
Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.
Who wins by task?
| Task | SpaceXAI: Grok 4.5 | NVIDIA: Nemotron 3 Nano Omni (free) |
|---|---|---|
| SQL Generation | 171 | 123 |
| Code Review | 167 | 122 |
| Code Completion | 120 | 129 |
| Code Refactoring | 164 | 123 |
| Bug Fixing | 180 | 130 |
| Unit Test Generation | 154 | 113 |
| Code Documentation | 142 | 126 |
| Regex Writing | 135 | 120 |
| CI/CD Pipelines | 144 | 113 |
| Frontend Component Design | 146 | 118 |
| Data Analysis | 170 | 120 |
| CSV / Spreadsheet Cleanup | 154 | 116 |
| ETL Scripting | 154 | 118 |
| JSON Extraction | 139 | 120 |
| Bulk Data Labeling | 125 | 126 |
| OCR / Document Parsing | 146 | 120 |
| Table Extraction from PDFs | 146 | 120 |
| Long-Document Summarization | 159 | 129 |
| Short-Form Summarization | 123 | 124 |
| Blog Post Writing | 140 | 119 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →