OpenAI compatible API · Attested · Public status

Meta: Llama 3.3 70B Instruct vs Z.ai: GLM 5.3 Flash

Meta: Llama 3.3 70B Instruct vs Z.ai: GLM 5.3 Flash: 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 Flash has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.3 Flash has more provider fallback routes, while Z.ai: GLM 5.3 Flash has the larger context window. Current TrustedRouter probes show Meta: Llama 3.3 70B Instruct with the lower p50 TTFT.

$0.564425/1MMeta: Llama 3.3 70B Instruct cheapest route

$0.342875/1MZ.ai: GLM 5.3 Flash cheapest route

662 msMeta: Llama 3.3 70B Instruct fastest measured p50 TTFT via wandb

5006 msZ.ai: GLM 5.3 Flash fastest measured p50 TTFT via arcee

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.

Meta: Llama 3.3 70B InstructZ.ai: GLM 5.3 Flash

Model idmeta-llama/llama-3.3-70b-instructz-ai/glm-5.3-flash

Publisher Cerebras Z.AI

AI IQ — IQ 121#20

Context131,072 tokens1,310,720 tokens

Provider routes1826

Cheapest route$0.564425/1M$0.342875/1M

Privacy posturehas provider E2EE routehas ZDR route

Fastest measured p50 TTFT662 ms via wandb5006 ms via arcee

Highest measured throughputnot enough datanot enough data

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

Modes chat chat

Meta: Llama 3.3 70B Instruct routes

Overview18 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Z.ai: GLM 5.3 Flash routes

Overview26 endpoints
PricingPrompt and completion 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="meta-llama/llama-3.3-70b-instruct",
    messages=messages,
)

Questions

Which should I use, Meta: Llama 3.3 70B Instruct or Z.ai: GLM 5.3 Flash?

Is Meta: Llama 3.3 70B Instruct or Z.ai: GLM 5.3 Flash cheaper?

The current cheapest TrustedRouter route is $0.564425/1M for Meta: Llama 3.3 70B Instruct and $0.342875/1M for Z.ai: GLM 5.3 Flash. The comparison uses current catalog prices and updates as provider pricing changes.

Is Meta: Llama 3.3 70B Instruct or Z.ai: GLM 5.3 Flash faster?

Current measured p50 time to first token is 662 ms for Meta: Llama 3.3 70B Instruct and 5006 ms for Z.ai: GLM 5.3 Flash. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Meta: Llama 3.3 70B Instruct and Z.ai: GLM 5.3 Flash with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between meta-llama/llama-3.3-70b-instruct and z-ai/glm-5.3-flash. This makes side-by-side evals possible without maintaining two provider integrations.