Seed 1.6
ByteDance Seed · released Dec 23, 2025
- Type
- Closed
- Input
- None held
- Output
- None held
- Cached
- None held
We don't hold a list price for this model yet · hosted only — we have no record of published weights
Our take
Written Sep 4, 2026Seed 1.6 is ByteDance's proprietary text, image and video model that can take in up to 262,144 tokens at once. It is built for long-document and video understanding, though no benchmark scores are available to verify its quality.
Pick this when you need an extremely long context for mixed text, image and video input, and you are comfortable with a hosted-only, unmeasured model. Skip it if you need verified quality scores, a wide choice of providers, or a lower output rate.
The case for it
- 262,144-token request limit — among the largest we track for multimodal input of this kind.
- Two hosted routes with identical pricing, so switching between them carries no cost surprise.
The case against it
- No benchmark scores in our data — chat, reasoning, coding and multimodal quality are all unverified.
- Output rate is eight times the input rate, which gets expensive for long replies.
- Only two offers; throughput is unverified on one route and unconfirmed on the other.
How good is it?
We hold no score for this model.
So there is no figure here for everyday use, coding, agent work or writing. That is a gap in our data, not a low score.
Where to rent it
Prices checked 2 hours ago — each listing carries its own date.
- 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 |
|---|---|---|---|---|---|---|
| OpenRouterOpenRouter's own listing | $0.25 / $2.00checked 2 hours ago | 262K | not measured | Unknown | Unknown | Unknown |
| Seedfp8Through OpenRouter | $0.25 / $2.00checked 2 hours ago | 262K33K max reply | 46 tok/s | No | No | Confirmed |
Across the 2 listings we hold: 1 says it does not train on prompts, 0 say they do and 1 does not say. 1 appears in the zero-retention registry we check; the rest are unknown to us.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenRouterOpenRouter's own listing | ✓ | ✓ | ✓ |
| Seedfp8Through OpenRouter | ✓ | ✓ | ✓ |
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
Recent changes
What moved
first indexed by our pipelineEach date is the day we first saw the change, or the day the maker announced it.
What we do not know about this model yet
- No independent board has scored it, 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 does not say whether it trains 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.
- We hold no batch or off-peak 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
We hold no licence record for this model, and no record of published weights either — so we can neither summarise its terms nor point you at the weights.
Identifiers
- Takes in, gives back
- Text, images and video in, text out
- Catalogue slug
- bytedance-seed-seed-1-6