+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT-5 Codex vs Grok-1.5
Comprehensive side-by-side LLM comparison
Grok-1.5 leads with 50.0% higher average benchmark score. Overall, Grok-1.5 is the stronger choice for coding tasks.
+
+
+
+
OpenAI
GPT-5 Codex is a language model developed by OpenAI. It achieves strong performance with an average score of 74.5% across 1 benchmarks. Notable strengths include SWE-Bench Verified (74.5%). Released in 2025, it represents OpenAI's latest advancement in AI technology.
+
+
+
+
xAI
Grok-1.5 is a language model developed by xAI. It achieves strong performance with an average score of 63.9% across 9 benchmarks. It excels particularly in GSM8k (90.0%), DocVQA (85.6%), MMLU (81.3%). Released in 2024, it represents xAI's latest advancement in AI technology.
1 year newer
Grok-1.5
xAI
2024-03-28
GPT-5 Codex
OpenAI
2025-09-15
Average performance across 10 common benchmarks
+
+
+
+
GPT-5 Codex
Average Score:7.4%
+
+
+
+
Grok-1.5
Average Score:57.5%(+50.0%)
+
+
+
+
Knowledge Cutoff
Training data recency comparison
GPT-5 Codex
2024-09-30
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT-5 Codex
0 providers
+
+
+
+
Grok-1.5
0 providers
+
+
+
+
GPT-5 Codex
Avg Score:7.4%
Providers:0
+
+
+
+
Grok-1.5
Avg Score:57.5%(+50.0%)
Providers:0