Comprehensive side-by-side LLM comparison
GPT-5 leads with 2.9% higher average benchmark score. GPT-5 offers 392.0K more tokens in context window than Grok-3. GPT-5 is $6.75 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
OpenAI
GPT-5 represents the next generation of OpenAI's foundational models, developed to advance the frontier of AI capabilities in reasoning, knowledge, and general intelligence. Built to push beyond the limitations of GPT-4, it incorporates architectural and training improvements designed to enhance performance across diverse tasks and domains.
xAI
Grok 3 was introduced as xAI's third-generation flagship model, designed to push the boundaries of reasoning, factual accuracy, and helpful assistance. Built to advance the state of AI capabilities, it incorporates improvements across language understanding, generation, and analytical thinking.
5 months newer

Grok-3
xAI
2025-02-17

GPT-5
OpenAI
2025-08-07
Cost per million tokens (USD)

GPT-5

Grok-3
Context window and performance specifications
Average performance across 3 common benchmarks

GPT-5

Grok-3
GPT-5
2024-09-30
Grok-3
2024-11-17
Available providers and their performance metrics

GPT-5
OpenAI
ZeroEval


GPT-5

Grok-3

GPT-5

Grok-3
Grok-3
xAI