GLM-5.3 Flashx

zai-org/glm-5.3-flashx

Z.ai (Zhipu)· 1M ctx

open weightstool callreasoningstructured quant: unknown

spread (output, p90 ÷ p10)

— too few providers

$1.25 – $1.25 · 1 providers · max÷min 1.0×

1 provider priced · 2 offerings

Including routers & resellers

Cheapest / median / spread use providers that serve the model on their own capacity: first-party lab, hyperscaler, inference host.

Provider classes in the stats:

Blended $/M assumptionsInput : output: 1Cache-hit share of input%

blended = 90.9% input × [(1 − 70% cache) × input + 70% cache × cache-read] + 9.1% × output + cache writes (30% of uncached input) where a write price is published

A provider that publishes no cache price is blended with cache share 0 (all input at the input price) and labelled “no cache price published” — never penalised against identical in/out prices.

Provider	Input	Output	Cache rd	Blended
Kilo Gateway router / aggregator	$0.37	$1.25	$0.07	$0.26
OpenRouter router / aggregator	$0.37	$1.25	$0.07	$0.26
Vercel AI Gateway router / aggregator	$0.37	$1.25	$0.07	$0.26
Z.AIfirst-party first-party lab	$0.37	$1.25	$0.07	$0.26
ZenMux router / aggregator	$0.38	$1.25	$0.07	$0.26

Connect

Provider (default: cheapest output among direct providers)

$1.25 /M · first-party lab

opencode.json

{
  "provider": {
    "zai": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://api.z.ai/api/paas/v4"
      },
      "models": {
        "glm-5.3-flashx": {}
      }
    }
  }
}

Set ZHIPU_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.