[ ByteDance ]

Seed 1.8

Routed to the cheapest source. At or below list. Pay per token in USDF, with no subscription and no minimum. Streaming and the OpenAI-compatible request format are supported.

All models

ByteDanceseed-1.8AvailabletextContext window: 256,000 tokens

Input

$0.25

$ / 1M tokens

Output

$2.00

$ / 1M tokens

Cached input

$0.05

$ / 1M tokens

Context window

256,000

tokens

Requires opting in to data retention.

Prompts above 128,000 tokens bill the whole request at $0.50/M input and $4.00/M output, $0.10/M cached input.

Model ID: seed-1.8
Modality: text
Unit: USD per 1M tokens
Status: Available
Endpoints: /v1/chat/completions
Context window: 256,000 tokens
Max output: 256,000 tokens
Pricing basis: Routed to the cheapest source. At or below list.

Sources

Make your first request

Use any OpenAI-compatible SDK. Change the base URL, keep everything else. Responses include a receipt with the exact cost.

No account: send the same request to /x402/v1/chat/completions without credentials and the gateway answers 402 with the quote. Pay per request.

curl https://api.usdf.fi/v1/chat/completions \
  -H "Authorization: Bearer $USDF_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "seed-1.8", "messages": [{"role": "user", "content": "Hello"}]}'