OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4 Flash 0731 vs GLM 5.3 Fast on Fireworks

DeepSeek V4 Flash 0731 has the lower published input-plus-output rate, 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.

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

DeepSeek V4 Flash 0731 has the lower published input-plus-output rate, more Credits provider routes and the lower measured p50 time to first token. Their context windows are the same size.

$0.142425/1MDeepSeek: DeepSeek V4 Flash 0731 cheapest route

$9.1785/1MGLM 5.3 Fast on Fireworks cheapest route

966 msDeepSeek: DeepSeek V4 Flash 0731 fastest measured p50 TTFT via lyceum

1206 msGLM 5.3 Fast on Fireworks fastest measured p50 TTFT via fireworks

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 Flash 0731GLM 5.3 Fast on Fireworks

Model iddeepseek/deepseek-v4-flash-0731z-ai/glm-5.3-fast

Publisher DeepSeek Z.AI

AI IQ — —

Context1,048,576 tokens1,048,576 tokens

Credits provider routes272

Cheapest route$0.142425/1M$9.1785/1M

Cached input$0.01/1M to $0.118793/1M$0.22155/1M to $0.41145/1M

Privacy posturehas Confidential route (E2EE + ZDR)has ZDR route

Fastest measured p50 TTFT966 ms via lyceum1206 ms via fireworks

Highest measured throughput96 tok/s via nextbitnot enough data

Recent route uptime range91.67% to 100.00%100.00%

Modes chat chat

DeepSeek: DeepSeek V4 Flash 0731 routes

Overview27 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

GLM 5.3 Fast on Fireworks routes

Overview2 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="deepseek/deepseek-v4-flash-0731",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4 Flash 0731 or GLM 5.3 Fast on Fireworks?

DeepSeek V4 Flash 0731 has the lower published input-plus-output rate, 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 0731 or GLM 5.3 Fast on Fireworks cheaper?

The current cheapest TrustedRouter route is $0.142425/1M for DeepSeek: DeepSeek V4 Flash 0731 and $9.1785/1M for GLM 5.3 Fast on Fireworks. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4 Flash 0731 or GLM 5.3 Fast on Fireworks faster?

Current measured p50 time to first token is 966 ms for DeepSeek: DeepSeek V4 Flash 0731 and 1206 ms for GLM 5.3 Fast on Fireworks. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V4 Flash 0731 and GLM 5.3 Fast on Fireworks 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-0731 and z-ai/glm-5.3-fast. This makes side-by-side evals possible without maintaining two provider integrations.