GLM 5.3 Flash (Fortanix)

About GLM 5.3 Flash (Fortanix)

GLM 5.3 Flash (Fortanix) is a chat model published by fortanix, with a 131,072-token context window. It scores 119 on AI IQ, ranked #50. Through TrustedRouter it runs on 1 provider, from $0.01 per million input tokens. One provider offers zero data retention.

Model ID

fortanix/glm-5.3-flash

Publisher

fortanix

Modes

chat

Billing

Credits

Set it up with your agent

Paste this into Claude Code, Cursor or any coding agent.

Use GLM 5.3 Flash (Fortanix) through TrustedRouter in this project.

1. Read https://trustedrouter.com/llms.txt
2. Point the OpenAI-compatible client at
   https://api-azure.trustedrouter.com/v1 and read the key from
   TRUSTEDROUTER_API_KEY.
3. Set the model to fortanix/glm-5.3-flash.
4. Run the tests, then show me the diff before committing.

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api-azure.trustedrouter.com/v1",
    api_key=os.environ["TRUSTEDROUTER_API_KEY"],
)
response = client.chat.completions.create(
    model="fortanix/glm-5.3-flash",
    messages=[{"role": "user", "content": "What is the capital of France?"}],
)
print(response.choices[0].message.content)

curl https://api-azure.trustedrouter.com/v1/chat/completions \
  -H "Authorization: Bearer $TRUSTEDROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "fortanix/glm-5.3-flash",
    "messages": [{"role": "user", "content": "What is the capital of France?"}]
  }'

Providers

Open the row for retention, location and weight format, or see how we check privacy claims and the live speed leaderboard.

GLM 5.3 Flash (Fortanix) providers and prices per 1M tokens

Provider	Input	Cached	Output	Cost per 1M in + out	Details
Fortanix Zero retention $0.01 in · $0.01 out	$0.01	—	$0.01	$0.02	Fortanix details
Retention Zero data retention. Verification: provider E2EE not verified. Zero data retention for TrustedRouter's managed GLM-5.3-Flash route, confirmed by the operator on November 10, 2026. This account-scoped declaration does not establish provider-wide retention terms, confidential compute, or provider-side end-to-end encryption. Provider policy source Location Operator country: Not verified Headquarters / registered office: Not verified. Inference: Santa Clara inference by operator declaration, not hardware-attested residency. TrustedRouter's managed GLM-5.3-Flash route only. Region pinning through TR: Select provider.only=[fortanix] with allow_fallbacks=false; this does not pin TrustedRouter gateway geography. Reviewed 2026-11-10. Operator declaration record (not independently attested) Full location evidence Weight format Unknown Price and speed Input $0.01/1M · Cached input Not published · Output $0.01/1M TTFT: insufficient data Speed: insufficient data Fortanix provider page

How to use GLM 5.3 Flash (Fortanix)

GLM 5.3 Flash hosted by Fortanix in Santa Clara, California (operator-declared location). Managed-route ZDR. Introductory pricing: $0.01 per million input tokens and $0.01 per million output tokens. The standard $0.000001 minimum per billed request and rounding apply. Limited-time offer; no end date announced. Pricing may change.

Input

OpenAI-compatible chat completions with text messages; JSON or streaming.

Output

Chat completion or server-sent events with token usage.

Example input

{"model":"fortanix/glm-5.3-flash","messages":[{"role":"user","content":"Hello"}],"max_tokens":256,"provider":{"only":["fortanix"],"allow_fallbacks":false}}

Example output

{"model":"fortanix/glm-5.3-flash","choices":[{"message":{"role":"assistant","content":"Hello!"}}]}