Seed 1.6 Flash with Jev
Seed 1.6 Flash is a model from ByteDance Seed, released 2025-12-23. It costs $0.075 per million input tokens and $0.300 per million output tokens, reads up to 262K tokens of context, and writes up to 32,768 tokens in one reply. Through llm11, set model to bytedance-seed/seed-1.6-flash.
The catalogue lists 2026-11-11 as the date Seed 1.6 Flash stops being served.
- Input price
- $0.075 / 1M
- Output price
- $0.300 / 1M
- Context window
- 262K tokens
- Max output
- 33K tokens
- Released
- 2025-12-23
- Accepts
- image, text, video
Read from the live catalogue and refreshed daily. At blended list price, 85% of the 332 priced models we can call cost more.
Using Seed 1.6 Flash with Jev
Jev is TypeSafe AI's System One model. It reads each request first and decides which model in your pool answers, with a calibrated confidence on that call. Seed 1.6 Flash does the answering when Jev sends it work, or when you name it yourself. At list price Seed 1.6 Flash falls in the llm11-fast band, but no pack routes to it because ByteDance Seed is not one of the labs the packs draw from. You can still pin it: pass bytedance-seed/seed-1.6-flash as model and routing steps aside while verification still runs.
Jev is new, so we have not published results for Seed 1.6 Flash with and without it, and this page does not invent any. Every response comes with a receipt that names the model that answered and what it cost against your most expensive model, so you can measure the pairing on your own traffic.
What a request costs
List price arithmetic, the same sum a receipt does. llm11 adds nothing per request; the only fee is on buying credits.
| Request | Tokens in / out | One | A thousand |
|---|---|---|---|
| Short chat turn | 500 / 200 | $0.00010 | $0.098 |
| Question over retrieved documents | 4,000 / 500 | $0.00045 | $0.450 |
| Long document summary | 30,000 / 1,000 | $0.00255 | $2.55 |
Cheaper models to try
The catalogue has no benchmark score for Seed 1.6 Flash, so this is a price ordering. It does not claim these answer as well.
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| Qwen Qwen3 32B | $0.080 | $0.280 | 131K | |
| Qwen Qwen2.5 7B Instruct | $0.100 | $0.200 | 33K | |
| Qwen Qwen3 Coder 30B A3B Instruct | $0.070 | $0.280 | 262K | |
| Qwen Qwen3.5-Flash | $0.065 | $0.260 | 1M |
Call it
Same OpenAI request shape. Naming the model pins it, so nothing is routed, and the answer is still checked.
python
from openai import OpenAI
client = OpenAI(base_url="https://www.llm11.com/v1", api_key="llm11_live_...")
res = client.chat.completions.create(
model="bytedance-seed/seed-1.6-flash",
messages=[{"role": "user", "content": "Hello"}],
)More from ByteDance Seed
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| Seed 2.1 Turbo | $0.500 | $2.50 | 262K | |
| Seed-2.0-CodeRetires 2026-11-11 | $0.500 | $3.00 | 262K | |
| Seed-2.0-Lite | $0.250 | $2.00 | 262K | |
| Seed-2.0-Mini | $0.100 | $0.400 | 262K | |
| Seed 1.6Retires 2026-11-11 | $0.250 | $2.00 | 262K |
Questions
- What is Seed 1.6 Flash with Jev?
- Jev is TypeSafe AI's System One model. It reads each request first and decides which model in your pool answers, with a calibrated confidence on that call. Seed 1.6 Flash does the answering when Jev sends it work, or when you name it yourself. At list price Seed 1.6 Flash falls in the llm11-fast band, but no pack routes to it because ByteDance Seed is not one of the labs the packs draw from. You can still pin it: pass bytedance-seed/seed-1.6-flash as model and routing steps aside while verification still runs. Routing decisions are made by Jev, TypeSafe AI's System One model.
- Is Seed 1.6 Flash a System One model?
- No. Seed 1.6 Flash answers requests. The System One model is Jev, which decides which model answers each one, so the two do different jobs and llm11 uses both.
- How much does Seed 1.6 Flash cost?
- $0.075 per million input tokens and $0.300 per million output tokens. A 4,000 token prompt with a 500 token answer costs about $0.00045, so a thousand of them is about $0.450. llm11 passes provider list price through and charges 5% when you buy credits.
- What is the Seed 1.6 Flash context window?
- 262,144 tokens, with up to 32,768 tokens in a single reply.
- Does Seed 1.6 Flash support tool calling and structured output?
- The catalogue lists tool calling, structured output and reasoning controls.
- Can I use Seed 1.6 Flash through llm11?
- Yes. Set model to bytedance-seed/seed-1.6-flash on the OpenAI-compatible endpoint and the request goes to it directly, with verification still running.
- Does Jev route to Seed 1.6 Flash?
- Routing decisions are made by Jev, TypeSafe AI's System One model. At list price Seed 1.6 Flash falls in the llm11-fast band, but no pack routes to it because ByteDance Seed is not one of the labs the packs draw from. You can still pin it: pass bytedance-seed/seed-1.6-flash as model and routing steps aside while verification still runs.
- What is a cheaper alternative to Seed 1.6 Flash?
- Nearest in price and below it: Qwen Qwen3 32B at $0.080 in and $0.280 out, Qwen Qwen2.5 7B Instruct at $0.100 in and $0.200 out and Qwen Qwen3 Coder 30B A3B Instruct at $0.070 in and $0.280 out. The catalogue has no benchmark score for Seed 1.6 Flash, so this is a price ordering. It does not claim these answer as well.
- Is Seed 1.6 Flash being retired?
- The catalogue lists 2026-11-11 as the date it stops being served. Move traffic before then.