Seed 1.6 Flash
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 Flash is a hosted-only model from ByteDance that handles text, images and video across a 262,144-token request limit. It is built for long-form multimodal work, though no independent quality scores are available yet.
Pick this when you need to analyse long documents or videos in a single request, or when your workflow mixes text, image and video inputs. Use it if you are happy with Seed's own hosting, which delivers 58 tokens per second. Skip it if you need measured benchmark scores, a verified backup provider, or the ability to run the model yourself.
The case for it
- 262,144-token request limit, among the largest we track for this model class.
- Identical pricing across both providers, so there is no need to shop around for a cheaper host.
The case against it
- No benchmark scores in our data — chat, reasoning, coding and multimodal quality are all unverified.
- Throughput is unverified on OpenRouter; only Seed-hosted performance is confirmed.
- Hosted only, with no downloadable weights for local deployment or audit.
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 Flash — 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
- $0.075 in / $0.30 out
- Context served
- 262K
- Throughput
- Not measured
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouter | $0.075 / $0.30 | 262K | not measured | Unknown | Unknown | Unknown |
| Seedfp8 | $0.075 / $0.30 | 262K | 57 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-flash