Updated March 26, 2026· Based on independent benchmark data
GPT-5.4 (xhigh) leads in intelligence with a score of 57.2 vs 12.0. Reka Flash (Sep '24) is 12.5x cheaper at $0.20/1M tokens vs $2.50/1M.
| Metric | Reka Flash (Sep '24) | GPT-5.4 (xhigh) |
|---|---|---|
| Intelligence Score | 12.0 | 57.2 |
| Coding Score | N/A | 57.3 |
| Math Score | N/A | N/A |
| Speed (tok/s) | 85 tok/s | 77 tok/s |
| Latency (TTFT) | 1.26s | 181.82s |
| Input Price / 1M tokens | $0.20 | $2.50 |
| Output Price / 1M tokens | $0.80 | $15 |
| Context Window | N/A | N/A |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text | Text |
GPT-5.4 (xhigh) outperforms Reka Flash (Sep '24) on the intelligence index with a score of 57.2 compared to 12.0.
Both models deliver similar output speeds: Reka Flash (Sep '24) at 85 tok/s and GPT-5.4 (xhigh) at 77 tok/s. Time to first token is 1.26s for Reka Flash (Sep '24) vs 181.82s for GPT-5.4 (xhigh), which affects perceived responsiveness in interactive applications.
Reka Flash (Sep '24) is more affordable at $0.20/1M input tokens ($0.80/1M output), while GPT-5.4 (xhigh) costs $2.50/1M input ($15/1M output). That makes GPT-5.4 (xhigh) 12.5x 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, Reka Flash (Sep '24) would cost approximately $1.20/month vs $15.00/month for GPT-5.4 (xhigh) in input costs alone.
Choose Reka Flash (Sep '24) when you need lower cost. Choose GPT-5.4 (xhigh) when you need higher intelligence (57.2).
Reka Flash (Sep '24) is cheaper at $0.20/1M input tokens vs $2.50/1M for GPT-5.4 (xhigh).
Reka Flash (Sep '24) is faster, producing output at 85 tok/s compared to GPT-5.4 (xhigh)'s 77 tok/s.
No, Reka Flash (Sep '24) does not support image input. Neither model supports image input.
It depends on your priorities. GPT-5.4 (xhigh) scores higher on intelligence (57.2), but Reka Flash (Sep '24) may be better for specific use cases like budget-conscious projects or speed-critical applications.
Data last synced: March 26, 2026
| Output Modalities |
| Text |
| Text |
| Free Tier | No | No |