Comprehensive side-by-side LLM comparison
o3 leads with 10.6% higher average benchmark score. o3 supports multimodal inputs. Overall, o3 is the stronger choice for coding tasks.
NVIDIA
Llama 3.1 Nemotron Ultra 253B was developed as NVIDIA's largest Nemotron variant, designed to provide maximum capability through extensive customization of large-scale foundations. Built with 253 billion parameters and NVIDIA's specialized training, it represents the flagship offering in the Nemotron family.
OpenAI
o3 represents the next generation in OpenAI's reasoning model series, developed to advance the capabilities of deliberate, step-by-step problem solving. Built to handle increasingly complex challenges across mathematics, science, and coding, it continues the evolution of reasoning-focused AI with improved analytical depth and accuracy.
9 days newer

Llama 3.1 Nemotron Ultra 253B v1
NVIDIA
2025-04-07

o3
OpenAI
2025-04-16
Context window and performance specifications
Average performance across 2 common benchmarks

Llama 3.1 Nemotron Ultra 253B v1

o3
Llama 3.1 Nemotron Ultra 253B v1
2023-12-01
o3
2024-05-31
Available providers and their performance metrics

Llama 3.1 Nemotron Ultra 253B v1

o3
OpenAI

Llama 3.1 Nemotron Ultra 253B v1

o3

Llama 3.1 Nemotron Ultra 253B v1

o3