bytedance-seed
ByteDance Seed: Seedream 4.5
bytedance-seed/seedream-4.5
Our take
AI-assisted analysis based on the sources below. Suitability is an editorial assessment; test it on your own workload.
OpenRouter's catalog presents bytedance-seed/seedream-4.5 as ByteDance Seed's Seedream 4.5 image-generation model. The listing reports a text-plus-image to image modality, a 4096-token context length, and support for common sampling controls. Its description claims improvements over Seedream 4.0, especially more consistent editing and preservation of subject details. Those are vendor or catalog statements rather than measured results in this evidence pack. No independent model card was available, so suitability should be validated on the intended workload.[1]
Strengths
- Accepts both text and image inputs and produces image output, according to the catalog.[1]
- The catalog reports better editing consistency and subject-detail preservation than Seedream 4.0; this is a claimed improvement, not a measured result.[1]
- The listing reports a 4096-token context length and support for frequency_penalty, max_tokens, temperature, and top_p controls.[1]
Limitations
- Only OpenRouter catalog evidence was supplied; an independent model card was not available, so licensing, hardware needs, safety behavior, and implementation details remain unknown.[1]
- The source provides no benchmark results or other measured performance; the reported editing improvements require validation on representative workloads.[1]
Where to use it
- Consider prototyping image generation or image-guided editing that combines text prompts with reference images; confirm quality with representative tests.[1]
- Evaluate it for design, marketing, or storyboard drafts when preserving subject details matters; treat that fit as a hypothesis, not a proven result.[1]
- Run a controlled trial if deployment depends on consistent edits, because the supplied evidence contains no workload measurements.[1]
Sources
- [1] OpenRouter catalog · ByteDance Seed: Seedream 4.5Sources checked: Nov 13, 2026
About this model
Description below is the original text supplied by OpenRouter, shown in the source language.
Seedream 4.5 is the latest in-house image generation model developed by ByteDance. Compared with Seedream 4.0, it delivers comprehensive improvements, especially in editing consistency, including better preservation of subject details,...
Specifications
- Model ID
- bytedance-seed/seedream-4.5
- Canonical ID
- bytedance-seed/seedream-4.5-20251203
- Creator
- bytedance-seed
- Added to OpenRouter
- 23.12.2025
- Context length
- 4,096
- Modality
- text+image->image
- Input modalities
- image, text
- Output modalities
- image
- Token pricing
- No per-token price in the source snapshot — see OpenRouter for the billing unit
- Knowledge cutoff
- —
- Expiration date
- —
Tasks and capabilities
A grade appears only where the source supplies a matching measurement for that task, the model is active and the cohort holds at least 10 comparable models. The capability column lists facts the source declares — supported formats, reasoning and tool parameters — which are not measured quality.
| Task | Grade | Source-declared capability |
|---|---|---|
| General quality | No measurement | — |
| Coding | No measurement | — |
| Agents | No measurement | — |
| Writing | No measurement | — |
| Reasoning | No measurement | — |
| Document analysis | No measurement | — |
| Vision | No measurement | input: image |
| Image generation | No measurement | output: image |
| Audio | No measurement | — |
| Video | No measurement | — |
| Embeddings | No measurement | — |
Evaluations
No evaluations are supplied for this model.
How grades work
Each letter grade compares a model only against other models scored by the same source and metric in the current snapshot. S means the top 10%, A the next 20%, B the next 30%, C the rest. Models without a published measurement are shown as not rated — a supported format alone never implies measured quality.
- S — S — top 10% of the cohort
- A — A — next 20% of the cohort
- B — B — next 30% of the cohort
- C — C — below the B band
Providers
Optional live provider statistics from OpenRouter. Missing values are unknown, not zero.
| Provider | Context length | Price in /1M | Price out /1M | Latency p50 (30m, s) | Throughput p50 (30m, tok/s) | Uptime (30m) |
|---|---|---|---|---|---|---|
| Seed | 4,096 | — | — | — | — | 100% |
Provider data retrieved: 13.11.2026
Related articles
No published articles identify this model yet.