Seed 1.6 Flash
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 2, 2026Seed 1.6 Flash is ByteDance's proprietary multimodal model that handles text, images and video in a single request of up to 262,144 tokens. It is positioned for long-context work where you need to feed in documents or video alongside prompts, with identical pricing across its two available endpoints.
Pick this when you need to analyse long documents or video alongside text and image inputs in one pass, or when you want the same rate from either provider without hunting for arbitrage. Skip it if you need verified quality scores to compare against alternatives, or if you need throughput guarantees on every endpoint.
The case for it
- Identical pricing across both tracked providers — no need to shop between them.
- Accepts text, images and video within a 262,144-token request limit.
The case against it
- No benchmark scores in our data: chat, reasoning, coding and multimodal quality are all unverified.
- Throughput of 57 tokens per second is only reported for Seed direct; the OpenRouter offer lists none.
- Parameter count is undisclosed by the vendor.
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
- $0.075 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 |
|---|---|---|---|---|---|---|
| OpenRouterOpenRouter's own listing | $0.075 / $0.30checked 2 hours ago | 262K | not measured | Unknown | Unknown | Unknown |
| Seedfp8Through OpenRouter | $0.075 / $0.30checked 2 hours ago | 262K33K max reply | 54 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-flash