Seed 1.6
ByteDance Seed · released Dec 23, 2025
- Type
- Proprietary
- Input
- None held
- Output
- None held
- Cached
- None held
We don't hold a list price for this model yet · hosted only — we hold no downloadable copy
Our take
Written Aug 3, 2026Seed 1.6 is ByteDance's hosted-only flagship that accepts text, images and video, and can handle up to 262,144 tokens in a single request. It is available through just two channels at identical rates, with no independent quality scores yet in our data.
Pick this for long-context multimodal work where you need a quarter-million tokens of working memory in one prompt, or when you prefer ByteDance's own API with its disclosed throughput figure over third-party routing. Skip it if you need verified quality benchmarks to justify the cost, or if you want the flexibility of downloadable weights or a broader choice of hosts.
The case for it
- Among the largest request limits we catalogue, at 262,144 tokens.
- Multimodal input across text, images and video in a single model.
The case against it
- No benchmark scores held, so performance against any task is unverified.
- Output rate is eight times the input rate with no quality data to justify the premium.
- Only two tracked offers and no alternative hosts for price competition.
How good is it?
We hold no score for this model.
We look for every model we track on every board we watch, and none of them has turned up Seed 1.6 — so there is no intelligence, coding, agentic or writing score to show you, not a low one, none.
Or rent it from someone else
Cheapest of 2 live listings. Picked at the widest standard context we hold, within one quantisation slice, so the numbers beside it are a price one host actually charges.
- per 1M tokens
- $0.25 in / $2.00 out
- Context served
- 262K
- Throughput
- Not measured
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouter | $0.25 / $2.00 | 262K | not measured | Unknown | Unknown | Unknown |
| Seedfp8 | $0.25 / $2.00 | 262K | 42 tok/s | No | No | Confirmed |
Across the 2 listings we hold: 1 say they do not train on prompts, 0 say they do and 1 do not say. 1 appear in the zero-retention registry we check; the rest are unknown to us rather than confirmed either way.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
- ✓
- Supported
- ✗
- Not supported
- Not published
- host gave no parameter list
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenRouter | ✓ | ✓ | ✓ |
| Seedfp8 | ✓ | ✓ | ✓ |
Tool calling: 2 of 2 listings say yes. JSON output: 2 of 2 listings say yes. Strict schema: 2 of 2 listings say yes.
When we formed this view
Dates behind this page
Prices last checked 9d ago
What we do not know about this model yet
- No board we watch has turned up a score, so we hold no quality figures at all.
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 2 listings do not say whether they train on prompts.
- We don't hold a list price for this model yet — the gap is ours, not the lab's.
- We hold no cached-input rate for any of its listings.
Licence and identifiers
What the licence allowsWe hold no licence record for this model. Inside are the identifiers you need to pull it — its Hugging Face repo where we have one, our slug and a machine-readable card.
Licence
Commercial API terms. We hold no licence record for this model, so there is nothing to summarise here.
Identifiers
- Modality record
- text+image+video->text
- Catalogue slug
- bytedance-seed-seed-1-6