OpenAI compatible API · Attested · Public status
GLM 5.2 Fast on Fireworks vs OpenAI: GPT-5 Nano
Compare GLM 5.2 Fast on Fireworks and OpenAI: GPT-5 Nano by providers, context, price, and TrustedRouter route support.
Onebase URL to migrate
100sof models and routes
Noneprompt logs by default
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
OpenAI: GPT-5 Nano has the lower cheapest prompt+completion route on TrustedRouter. GLM 5.2 Fast on Fireworks has more provider fallback routes, while GLM 5.2 Fast on Fireworks has the larger context window. Current TrustedRouter probes show GLM 5.2 Fast on Fireworks with the lower p50 TTFT.
$12.18/1MGLM 5.2 Fast on Fireworks cheapest route
$0.4725/1MOpenAI: GPT-5 Nano cheapest route
3316 msGLM 5.2 Fast on Fireworks measured p50 TTFT
5143 msOpenAI: GPT-5 Nano measured p50 TTFT
GLM 5.2 Fast on FireworksOpenAI: GPT-5 Nano
Model id
z-ai/glm-5.2-fastopenai/gpt-5-nano
PublisherZ.AIOpenAI
Context1,048,576 tokens400,000 tokens
Provider routes44
Cheapest route$12.18/1M$0.4725/1M
Privacy postureprovider posture variesprovider posture varies
Modes
chat
chat
GLM 5.2 Fast on Fireworks routes
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="z-ai/glm-5.2-fast",
messages=messages,
)