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