Updated March 26, 2026· Based on independent benchmark data
Grok 4.20 Beta 0309 (Reasoning) and GPT-5.4 mini (xhigh) are virtually tied on intelligence (48.5 vs 48.1). GPT-5.4 mini (xhigh) is 2.7x cheaper at $0.75/1M tokens vs $2.00/1M.
| Metric | Grok 4.20 Beta 0309 (Reasoning) | GPT-5.4 mini (xhigh) |
|---|---|---|
| Intelligence Score | 48.5 | 48.1 |
| Coding Score | 42.2 | 51.5 |
| Math Score | N/A | N/A |
| Speed (tok/s) | 246 tok/s | 218 tok/s |
| Latency (TTFT) | 11.75s | 7.45s |
| Input Price / 1M tokens | $2.00 | $0.75 |
| Output Price / 1M tokens | $6.00 | $4.50 |
| Context Window | N/A |
Grok 4.20 Beta 0309 (Reasoning) and GPT-5.4 mini (xhigh) perform similarly on overall intelligence, scoring 48.5 and 48.1 respectively. For coding tasks, GPT-5.4 mini (xhigh) has the edge with a coding score of 51.5 vs 42.2.
Both models deliver similar output speeds: Grok 4.20 Beta 0309 (Reasoning) at 246 tok/s and GPT-5.4 mini (xhigh) at 218 tok/s. Time to first token is 7.45s for GPT-5.4 mini (xhigh) vs 11.75s for Grok 4.20 Beta 0309 (Reasoning), which affects perceived responsiveness in interactive applications.
GPT-5.4 mini (xhigh) is more affordable at $0.75/1M input tokens ($4.50/1M output), while Grok 4.20 Beta 0309 (Reasoning) costs $2.00/1M input ($6.00/1M output). That makes Grok 4.20 Beta 0309 (Reasoning) 2.7x more expensive per token, which can add up significantly at scale. For a typical workload of 100 requests per day at 2,000 tokens each, Grok 4.20 Beta 0309 (Reasoning) would cost approximately $12.00/month vs $4.50/month for GPT-5.4 mini (xhigh) in input costs alone.
Choose GPT-5.4 mini (xhigh) when you need stronger coding performance (51.5), lower cost.
GPT-5.4 mini (xhigh) scores higher on coding benchmarks (51.5 vs 42.2), making it the better choice for programming tasks.
GPT-5.4 mini (xhigh) is cheaper at $0.75/1M input tokens vs $2.00/1M for Grok 4.20 Beta 0309 (Reasoning).
Grok 4.20 Beta 0309 (Reasoning) is faster, producing output at 246 tok/s compared to GPT-5.4 mini (xhigh)'s 218 tok/s.
No, Grok 4.20 Beta 0309 (Reasoning) does not support image input. Neither model supports image input.
Data last synced: March 26, 2026
| N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text | Text |
| Output Modalities | Text | Text |
| Free Tier | No | No |
Both models perform similarly on intelligence benchmarks. Choose based on specific needs: pricing, speed, context window, or provider ecosystem.