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SpaceXAI: Grok Build 0.1 vs Z.ai: GLM 5.3

Try both on us. Starter credit covers your first requests, then one key routes Grok Build 0.1 and GLM 5.3. Switch by changing the model name.

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

Monthly evidence

SpaceXAI: Grok Build 0.1 has the lower published input-plus-output rate. Z.ai: GLM 5.3 has more Credits provider routes, the larger context window and the lower measured p50 time to first token.

$3.165/1MSpaceXAI: Grok Build 0.1 cheapest route

$3.458818/1MZ.ai: GLM 5.3 cheapest route

1652 msSpaceXAI: Grok Build 0.1 fastest measured p50 TTFT via grok

867 msZ.ai: GLM 5.3 fastest measured p50 TTFT via parasail

The price comparison adds each route's rate for one million input tokens and one million output tokens; your cost depends on your input/output mix. Prices and live route measurements can change. Use the monthly reports when you need a stable evidence window, then run a small task-specific eval before choosing a production default.

SpaceXAI: Grok Build 0.1Z.ai: GLM 5.3

Model idx-ai/grok-build-0.1z-ai/glm-5.3

Publisher xAI Grok Z.AI

AI IQ — IQ 124#30

Context256,000 tokens1,048,576 tokens

Credits provider routes233

Cheapest route$3.165/1M$3.458818/1M

Cached input$0.211/1M to $0.422/1M$0.1055/1M to $0.84189/1M

Privacy postureprovider posture varieshas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFT1652 ms via grok867 ms via parasail

Highest measured throughputnot enough data186 tok/s via pearl

Recent route uptime range100.00%0.00% to 100.00%

Modes chat chat

SpaceXAI: Grok Build 0.1 routes

Overview2 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Z.ai: GLM 5.3 routes

Overview33 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

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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-build-0.1",
    messages=messages,
)

Questions

Which should I use, SpaceXAI: Grok Build 0.1 or Z.ai: GLM 5.3?

SpaceXAI: Grok Build 0.1 has the lower published input-plus-output rate. Z.ai: GLM 5.3 has more Credits provider routes, the larger context window and the lower measured p50 time to first token.

Is SpaceXAI: Grok Build 0.1 or Z.ai: GLM 5.3 cheaper?

The current cheapest TrustedRouter route is $3.165/1M for SpaceXAI: Grok Build 0.1 and $3.458818/1M for Z.ai: GLM 5.3. The comparison uses current catalog prices and updates as provider pricing changes.

Is SpaceXAI: Grok Build 0.1 or Z.ai: GLM 5.3 faster?

Current measured p50 time to first token is 1652 ms for SpaceXAI: Grok Build 0.1 and 867 ms for Z.ai: GLM 5.3. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test SpaceXAI: Grok Build 0.1 and Z.ai: GLM 5.3 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between x-ai/grok-build-0.1 and z-ai/glm-5.3. This makes side-by-side evals possible without maintaining two provider integrations.