head-to-head

NVIDIA: Nemotron 3 Nano Omni (free) vs OpenAI: GPT-5.3-Codex

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.

	NVIDIA: Nemotron 3 Nano Omni (free)	OpenAI: GPT-5.3-Codex
Vendor	nvidia	openai
Quality Score	100	100
Benchmark Score	-	53.3
Input Price	Free	$1.75/M
Output Price	Free	$14.00/M
Context Window	256,000	400,000
Max Output	65,536	128,000
Tool Calling	✓	✓
Structured Output	-	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	✓	-
Benchmark Scores
ai_index	-	53.6

Who wins by task?

Task	NVIDIA: Nemotron 3 Nano Omni (free)	OpenAI: GPT-5.3-Codex
SQL Generation	123	138
Code Review	122	142
Code Completion	129	117
Code Refactoring	123	144
Bug Fixing	130	146
Unit Test Generation	113	130
Code Documentation	126	133
Regex Writing	120	122
CI/CD Pipelines	113	126
Frontend Component Design	118	128
Data Analysis	120	132
CSV / Spreadsheet Cleanup	116	134
ETL Scripting	118	135
JSON Extraction	120	120
Bulk Data Labeling	126	117
OCR / Document Parsing	120	133
Table Extraction from PDFs	120	133
Long-Document Summarization	129	145
Short-Form Summarization	124	115
Blog Post Writing	119	126

Scores reflect capability match + benchmark data + pricing for each task. Methodology →