OpenAI compatible API. Attested gateway. Public status.

xAI: Grok 4.20 vs Z.AI GLM 5.2

Compare xAI: Grok 4.20 and Z.AI GLM 5.2 by providers, context, price, and TrustedRouter route support.

Verify gateway

1 URLbase_url migration

100smodels and routes

0prompt logs by default

Compare routesProviders, price, context, and policy posture in one view.

Use auto when uptime mattersKeep a primary model and let fallback handle provider failures.

Same API shapeUse the OpenAI client and set the model you want.

Practical read

xAI: Grok 4.20 has the lower cheapest prompt+completion route on TrustedRouter. xAI: Grok 4.20 has more provider fallback routes, while xAI: Grok 4.20 has the larger context window. Probe-backed speed data is shown when enough recent samples exist.

$4.125/1MxAI: Grok 4.20 cheapest route

$6.38/1MZ.AI GLM 5.2 cheapest route

1026 msxAI: Grok 4.20 measured p50 TTFT

not enough dataZ.AI GLM 5.2 measured p50 TTFT

xAI: Grok 4.20Z.AI GLM 5.2

Model idx-ai/grok-4.20z-ai/glm-5.2

PublisherxAI GrokZ.AI

Context2,000,000 tokens1,000,000 tokens

Provider routes22

Cheapest route$4.125/1M$6.38/1M

Privacy postureprovider posture variesprovider posture varies

Modes chat chat

xAI: Grok 4.20 routes

Overview2 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Z.AI GLM 5.2 routes

Overview2 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Production choice

Pick a default model. Keep fallback enabled.

TrustedRouter is useful when you know the model you want, but still need provider rollover, budget limits, usage records, and a prompt path you can verify.

OpenAI clientPython

client = OpenAI(
    base_url="https://api.trustedrouter.com/v1",
    api_key="sk-tr-v1-..."
)

response = client.chat.completions.create(
    model="x-ai/grok-4.20",
    messages=messages,
)