Seed 2.1 Turbo

bytedance-seed· 2026-06-23· 262K ctx

API onlytool callreasoningstructured quant: unknown

spread (output)

1.8×

$1.77 – $3.13 · 8 providers

8 providers priced

Provider	Input	Output	Cache rd	Blended
Volcengine Ark Coding Plan relay router	free/—	free/—	$0	free/—
Ofox relay router	$0.354	$1.77	$0.068	$0.301
Volcengine Ark relay router	$0.445	$2.23	$0.089	$0.381
Vercel AI Gateway unknown	$0.500	$2.50	$0.100	$0.427
OpenRouter unknown	$0.500	$2.50	—	$0.682^*
Kilo Gateway relay router	$0.500	$2.50	—	$0.682^*
NanoGPT relay router	$0.500	$2.50	$0.250	$0.523
Venice AIoutlier unknown	$0.625	$3.13	$0.125	$0.534
EmpirioLabs AIoutlier relay router	$0.630	$3.13	$0.630	$0.857

Cheapest (output)

Ofox

$1.77 /M

opencode.json

{
  "provider": {
    "ofox": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://api.ofox.ai/v1"
      },
      "models": {
        "volcengine/doubao-seed-2.1-turbo": {}
      }
    }
  }
}

Set OFOX_API_KEY in your environment. Generated — verify against the OpenCode docs.

Output $/M over time7-day preview

Median line, min–max band. Pre-2026-09 points are catalog-recorded dates from models.dev git history, not provider effective dates.

Full price history & dynamics

This is a 7-day preview. Sign in for 30 days free; the full series and export are the API subscription.

Data: models.dev (MIT), snapshot 2026-09-20. Prices are vendor-published; verify before purchase. Methodology.