⚖️ Compare models
Side-by-side specs, arena Elo, and cheapest prices for up to 4 models. Best value in each row is highlighted.
| Spec | GPT-5 Chat✕ | Step 3.5 Flash✕ |
|---|---|---|
| Organization | openai | stepfun |
| Use case | chat | chat |
| Capabilities | vision, chat | chat |
| Access | Proprietary | Open weights (unrestricted) |
| Text Arena Elo | 1403 | 1403 |
| Cheapest input $/M | $1.25 | $0.0900 |
| Cheapest output $/M | $10.00 | $0.30 |
| Context window | 128K | 262K |
| Parameters | — | — |
| HF downloads | — | 267.3K |
| 7d news mentions | — | — |