Prism vs GPT-5.4
GPT-5.4 is cheaper on output tokens, while GPT-5.4 offers a larger context window. Choose Prism or GPT-5.4 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Prism | GPT-5.4 |
|---|---|---|
| Provider | Charm Hyper | OpenAI |
| Input / 1M tokens | $3.27 | $2.50 |
| Output / 1M tokens | $16.33 | $15.00 |
| Context window | 1M | 1.1M |
| Parameters | — | — |
| Open weights | No | No |
| Released | Jan 1970 | Mar 2026 |
| LiveBench score | — | 80.9 |
| GPQA Diamond score | — | 93.3 |
| FrontierMath score | — | 47.6 |
| Epoch Capabilities Index score | — | 157 |
| LMArena (Chatbot Arena) Elo score | — | 1469 |
| LMArena WebDev Elo score | — | 1463 |
| LMArena Vision Elo score | — | 1303 |
FAQ
Is Prism or GPT-5.4 cheaper?
GPT-5.4 is cheaper on output tokens ($15.00 vs $16.33 per 1M).
Which has the larger context window, Prism or GPT-5.4?
GPT-5.4 has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.