Compare Seedream 4.5 from bytedance-seed and Step 3.5 Flash from stepfun on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
Seedream 4.5 and Step 3.5 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Seedream 4.5, from bytedance-seed, is priced from $0.04/image on OpenRouter.
Step 3.5 Flash, from stepfun, has a 262,144-token context window and is priced at $0.10/M tokens input, $0.30/M tokens output on OpenRouter.
| Seedream 4.5 | Step 3.5 Flash | |
|---|---|---|
| Input price | Not applicable | $0.10/M tokens |
| Output price | Not applicable | $0.30/M tokens |
| Context window | Not applicable | 262,144 tokens |
| Intelligence Index | Not available | 17.0 |
| Coding Index | Not available | Not available |
| Agentic Index | Not available | Not available |
| Latency (p50) | Not available | 1.28 s |
| Throughput (p50) | Not available | 54.0 tok/s |