Z.ai: GLM 5.3 Flash

New

z-ai/glm-5.3-flashModel weights

GLM-5.3-Flash is Z.ai's natively multimodal 320B MoE model with 18B active parameters, designed for efficient coding, long-horizon agent tasks, visual understanding, and long-context inference. Served as a TEE deployment via Phala.

Modalities: TextImagetoText
In / out price: $0.15 / $0.50per 1MCache read $0.03 per 1M
Context: 1M
Released: Aug 27, 2026

Providers

RedPill routes this private model across verified providers with automatic fallbacks. Pricing is unified, so you pay the same price no matter which provider serves your request, while live metrics show first-token latency, speed, and uptime.


phala	Checking	Checking	Checking

Gateway API

Call this model through RedPill's OpenAI-compatible API.

Create an API key
Set REDPILL_API_KEY
Run the request
Verify the response

Create key Documentation

Working with agentsConnect RedPill to agent frameworks and runtimes.

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://tee.redpill.ai/v1",
  apiKey: process.env.REDPILL_API_KEY,
});

const response = await client.chat.completions.create({
  model: "z-ai/glm-5.3-flash",
  messages: [{ role: "user", content: "Say hello." }],
});

Verify Privacy Evidence

TEE responses carry two proof layers you can check yourself: a nonce-bound attestation report for the gateway, and a signed receipt that binds your request and response to an attested upstream session.

# 1. Verify the gateway (nonce-bound, proves which protected workload serves you)
NONCE="$(openssl rand -hex 16)"
curl -s "https://api.redpill.ai/v1/attestation/report?nonce=$NONCE" \
  -H "Authorization: Bearer $REDPILL_API_KEY" -o report.json

# 2. Call the model and capture the x-receipt-id response header
cat > request.json <<'JSON'
{"model":"z-ai/glm-5.3-flash","messages":[{"role":"user","content":"Hello"}],"provider":{"aci_verified":true}}
JSON
curl -s "https://api.redpill.ai/v1/chat/completions" -D headers.txt \
  -H "Authorization: Bearer $REDPILL_API_KEY" -H "Content-Type: application/json" \
  --data-binary @request.json -o response.json
RECEIPT_ID="$(grep -i ^x-receipt-id headers.txt | tr -d '\r' | awk '{print $2}')"

# 3. Fetch the signed receipt, then follow it to the attested session
curl -s "https://api.redpill.ai/v1/aci/receipts/$RECEIPT_ID" \
  -H "Authorization: Bearer $REDPILL_API_KEY" -o receipt.json
SESSION_ID="$(jq -r '.event_log[]|select(.type=="upstream.verified").session_id' receipt.json)"
curl -s "https://api.redpill.ai/v1/aci/sessions/$SESSION_ID" \
  -H "Authorization: Bearer $REDPILL_API_KEY"

Full verification walkthrough

Z.ai: GLM 5.3 Flash

Providers

Gateway API

Verify Privacy Evidence

Command Palette