GPT 5 Codex vs Grok 4.5
GPT-5 optimized for code generation and software engineering tasks.
xAI's Opus-class flagship for frontier coding, agentic tool use, and knowledge work.
No captured outputs for these models yet.
Frequently Asked Questions: GPT 5 Codex vs Grok 4.5▼
Which is better, GPT 5 Codex or Grok 4.5?
▼
Both GPT 5 Codex and Grok 4.5 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.
Which is cheaper, GPT 5 Codex or Grok 4.5?
▼
Grok 4.5 has a lower blended cost. GPT 5 Codex: $1.25 input / $10.00 output. Grok 4.5: $2.00 input / $6.00 output.
Which has a larger context window, GPT 5 Codex or Grok 4.5?
▼
Grok 4.5 has a larger context window: GPT 5 Codex supports 400K tokens vs Grok 4.5 at 500K tokens.
Do both GPT 5 Codex and Grok 4.5 support vision?
▼
Yes, both GPT 5 Codex and Grok 4.5 support vision/image input.
What are the key differences between GPT 5 Codex and Grok 4.5?
▼
GPT 5 Codex and Grok 4.5 have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.
Which model should I choose for my use case?
▼
If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GPT 5 Codex and Grok 4.5 for free on idapt.app to see which performs better for your specific needs.