zai/glm-5.3-flashx

zai· 1M ctx

open weightstool callreasoningstructured quant: unknown

spread (output)

1.0×

$1.25 – $1.25 · 6 providers

6 providers priced

Provider	Input	Output	Cache rd	Blended
Kilo Gateway relay router	$0.370	$1.25	$0.075	$0.262
OpenRouter unknown	$0.370	$1.25	$0.075	$0.262
Vercel AI Gateway unknown	$0.370	$1.25	$0.075	$0.262
Z.AI relay router	$0.370	$1.25	$0.075	$0.262
ZenMux relay router	$0.375	$1.25	$0.075	$0.264
Zhipu AI first party lab	$0.370	$1.25	$0.075	$0.262

Cheapest (output)

Kilo Gateway

$1.25 /M

opencode.json

{
  "provider": {
    "kilo": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://api.kilo.ai/api/gateway"
      },
      "models": {
        "z-ai/glm-5.3-flashx": {}
      }
    }
  }
}

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

Output $/M over time

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

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