OpenAI compatible API · Attested · Public status

Thinking Machines: Inkling Small vs Z.ai: GLM 5.1

Thinking Machines: Inkling Small vs Z.ai: GLM 5.1: 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

Thinking Machines: Inkling Small has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.1 has more provider fallback routes, while Thinking Machines: Inkling Small has the larger context window. Current TrustedRouter probes show Z.ai: GLM 5.1 with the lower p50 TTFT.

$1.575/1MThinking Machines: Inkling Small cheapest route

$4.263/1MZ.ai: GLM 5.1 cheapest route

1679 msThinking Machines: Inkling Small fastest measured p50 TTFT via baseten

1079 msZ.ai: GLM 5.1 fastest measured p50 TTFT via wafer

Thinking Machines: Inkling SmallZ.ai: GLM 5.1

Model idthinkingmachines/inkling-smallz-ai/glm-5.1

Publisher DeepInfra Z.AI

AI IQ IQ 105#54 IQ 114#32

Context524,288 tokens204,800 tokens

Provider routes624

Cheapest route$1.575/1M$4.263/1M

Privacy postureprovider posture varieshas confidential-compute route

Fastest measured p50 TTFT1679 ms via baseten1079 ms via wafer

Highest measured throughput158 tok/s via basetennot enough data

Recent route uptime range100.00%66.67% to 100.00%

Modes chat chat

Thinking Machines: Inkling Small routes

Overview6 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

Z.ai: GLM 5.1 routes

Overview24 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
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-small",
    messages=messages,
)

Questions

Which should I use, Thinking Machines: Inkling Small or Z.ai: GLM 5.1?

Is Thinking Machines: Inkling Small or Z.ai: GLM 5.1 cheaper?

The current cheapest TrustedRouter route is $1.575/1M for Thinking Machines: Inkling Small and $4.263/1M for Z.ai: GLM 5.1. The comparison uses current catalog prices and updates as provider pricing changes.

Is Thinking Machines: Inkling Small or Z.ai: GLM 5.1 faster?

Current measured p50 time to first token is 1679 ms for Thinking Machines: Inkling Small and 1079 ms for Z.ai: GLM 5.1. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Thinking Machines: Inkling Small and Z.ai: GLM 5.1 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-small and z-ai/glm-5.1. This makes side-by-side evals possible without maintaining two provider integrations.