Updated March 26, 2026· Based on independent benchmark data
Both xAI: Grok 4.20 and GPT-5.3 Codex (xhigh) are competitive AI models. See the detailed comparison below to find which best fits your needs.
| Metric | xAI: Grok 4.20 | GPT-5.3 Codex (xhigh) |
|---|---|---|
| Intelligence Score | N/A | 54.0 |
| Coding Score | N/A | 53.1 |
| Math Score | N/A | N/A |
| Speed (tok/s) | N/A | 72 tok/s |
| Latency (TTFT) | N/A | 83.91s |
| Input Price / 1M tokens | $1.25 | $1.75 |
| Output Price / 1M tokens | $2.50 | $14 |
| Context Window | 2M | N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text + Image + File | Text |
| Output Modalities | Text | Text |
| Free Tier | No | No |
xAI: Grok 4.20 is more affordable at $1.25/1M input tokens ($2.50/1M output), while GPT-5.3 Codex (xhigh) costs $1.75/1M input ($14/1M output). For a typical workload of 100 requests per day at 2,000 tokens each, xAI: Grok 4.20 would cost approximately $7.50/month vs $10.50/month for GPT-5.3 Codex (xhigh) in input costs alone.
xAI: Grok 4.20 is cheaper at $1.25/1M input tokens vs $1.75/1M for GPT-5.3 Codex (xhigh).
Yes, xAI: Grok 4.20 supports image input. GPT-5.3 Codex (xhigh) does not support image input.
Data last synced: March 26, 2026