Comprehensive side-by-side LLM comparison
Grok Code Fast 1 leads with 2.7% higher average benchmark score. o4-mini offers 34.0K more tokens in context window than Grok Code Fast 1. Grok Code Fast 1 is $3.80 cheaper per million tokens. o4-mini supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
xAI
Grok Code Fast was developed as a specialized coding model optimized for speed, designed to provide rapid code completion, generation, and assistance. Built to serve developers requiring quick feedback and iterative coding support, it combines programming expertise with low-latency responses.
OpenAI
o4-mini was created as part of the next generation of OpenAI's reasoning models, designed to continue advancing the balance between analytical capability and operational efficiency. Built to bring cutting-edge reasoning techniques to applications requiring quick turnaround, it represents the evolution of compact reasoning-focused models.
4 months newer

o4-mini
OpenAI
2025-04-16

Grok Code Fast 1
xAI
2025-08-28
Cost per million tokens (USD)

Grok Code Fast 1

o4-mini
Context window and performance specifications
Average performance across 1 common benchmarks

Grok Code Fast 1

o4-mini
Performance comparison across key benchmark categories

Grok Code Fast 1

o4-mini
o4-mini
2024-05-31
Available providers and their performance metrics

Grok Code Fast 1
xAI

o4-mini

Grok Code Fast 1

o4-mini

Grok Code Fast 1

o4-mini
OpenAI