OpenAI compatible API · Attested · Public status

Thinking Machines: Inkling vs Z.ai: GLM 5.3

Thinking Machines: Inkling vs Z.ai: GLM 5.3: compare current API pricing, context, provider routes, privacy, p50 latency, and OpenAI-compatible access.

Verify gateway

Onebase URL to migrate

100sof models and routes

0prompt or output logs. Always.

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

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

$5.275/1MThinking Machines: Inkling cheapest route

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

1381 msThinking Machines: Inkling fastest measured p50 TTFT via thinkingmachines

1085 msZ.ai: GLM 5.3 fastest measured p50 TTFT via sail-research

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.

Thinking Machines: InklingZ.ai: GLM 5.3

Model idthinkingmachines/inklingz-ai/glm-5.3

Publisher Thinking Machines Lab Z.AI

AI IQ IQ 108#79 IQ 125#23

Context524,288 tokens1,048,576 tokens

Credits provider routes431

Cheapest route$5.275/1M$3.458818/1M

Cached input$0.1688/1M to $0.17935/1M$0.133141/1M to $1.02546/1M

Privacy posturehas ZDR routehas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFT1381 ms via thinkingmachines1085 ms via sail-research

Highest measured throughputnot enough data331 tok/s via makora

Recent route uptime range100.00%91.67% to 100.00%

Modes chat chat

Thinking Machines: Inkling routes

Overview4 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Z.ai: GLM 5.3 routes

Overview31 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="thinkingmachines/inkling",
    messages=messages,
)

Questions

Which should I use, Thinking Machines: Inkling or Z.ai: GLM 5.3?

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

Is Thinking Machines: Inkling or Z.ai: GLM 5.3 cheaper?

The current cheapest TrustedRouter route is $5.275/1M for Thinking Machines: Inkling and $3.458818/1M for Z.ai: GLM 5.3. The comparison uses current catalog prices and updates as provider pricing changes.

Is Thinking Machines: Inkling or Z.ai: GLM 5.3 faster?

Current measured p50 time to first token is 1381 ms for Thinking Machines: Inkling and 1085 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 Thinking Machines: Inkling 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 thinkingmachines/inkling and z-ai/glm-5.3. This makes side-by-side evals possible without maintaining two provider integrations.