DeepSeek: DeepSeek V4 Flash 0423 vs Z.ai: GLM 5.3 Flash
DeepSeek V4 Flash 0423 has the lower published input-plus-output rate. Z.ai: GLM 5.3 Flash has more Credits provider routes and the lower measured p50 time to first token. Their context windows are the same size. Compare price, speed, context, and privacy.
Practical read
Monthly evidenceDeepSeek V4 Flash 0423 has the lower published input-plus-output rate. Z.ai: GLM 5.3 Flash has more Credits provider routes and the lower measured p50 time to first token. Their context windows are the same size.
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.
deepseek/deepseek-v4-flashz-ai/glm-5.3-flash
DeepSeek: DeepSeek V4 Flash 0423 routes
- Overview12 Credits routes
- PricingInput, cached input, and output rates
- BenchmarksTrustedRouter and external sources
- ProvidersAll serving providers
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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.
client = OpenAI(
base_url="https://api.trustedrouter.com/v1",
api_key="sk-tr-v1-..."
)
response = client.chat.completions.create(
model="deepseek/deepseek-v4-flash",
messages=messages,
)Questions
Which should I use, DeepSeek: DeepSeek V4 Flash 0423 or Z.ai: GLM 5.3 Flash?
DeepSeek V4 Flash 0423 has the lower published input-plus-output rate. Z.ai: GLM 5.3 Flash has more Credits provider routes and the lower measured p50 time to first token. Their context windows are the same size.
Is DeepSeek: DeepSeek V4 Flash 0423 or Z.ai: GLM 5.3 Flash cheaper?
The current cheapest TrustedRouter route is $0.28485/1M for DeepSeek: DeepSeek V4 Flash 0423 and $0.32705/1M for Z.ai: GLM 5.3 Flash. The comparison uses current catalog prices and updates as provider pricing changes.
Is DeepSeek: DeepSeek V4 Flash 0423 or Z.ai: GLM 5.3 Flash faster?
Current measured p50 time to first token is 1068 ms for DeepSeek: DeepSeek V4 Flash 0423 and 910 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 DeepSeek: DeepSeek V4 Flash 0423 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 deepseek/deepseek-v4-flash and z-ai/glm-5.3-flash. This makes side-by-side evals possible without maintaining two provider integrations.