OpenAI compatible API · Attested · Public status

OpenAI: gpt-oss-120b vs GLM 4.5 Air

gpt-oss-120b vs GLM 4.5 Air: 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

OpenAI: gpt-oss-120b has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: gpt-oss-120b has more provider fallback routes, while OpenAI: gpt-oss-120b has the larger context window. Probe-backed speed data is shown when enough recent samples exist.

$0.211/1MOpenAI: gpt-oss-120b cheapest route

$1.0339/1MGLM 4.5 Air cheapest route

1035 msOpenAI: gpt-oss-120b fastest measured p50 TTFT via cloudflare-workers-ai

not enough dataGLM 4.5 Air fastest measured p50 TTFT

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.

OpenAI: gpt-oss-120bGLM 4.5 Air

Model idopenai/gpt-oss-120bzai-org/glm-4.5-air

Publisher OpenAI Novita AI

AI IQ IQ 98#99 —

Context131,072 tokens131,072 tokens

Credits provider routes221

Cheapest route$0.211/1M$1.0339/1M

Cached input$0.015825/1M to $0.1055/1M$0.026375/1M

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT1035 ms via cloudflare-workers-ainot enough data

Highest measured throughput290 tok/s via cerebrasnot enough data

Recent route uptime range100.00%not enough data

Modes chat chat

OpenAI: gpt-oss-120b routes

Overview22 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

GLM 4.5 Air routes

Overview1 Credits routes

Related comparisons

Browse every comparison

OpenAI: gpt-oss-120b vs Z.ai: GLM 5.250 combined provider routes
OpenAI: gpt-oss-120b vs Z.ai: GLM 5.349 combined provider routes
OpenAI: gpt-oss-120b vs Z.ai: GLM 5.3 Flash47 combined provider routes
DeepSeek: DeepSeek V4 Flash 0731 vs OpenAI: gpt-oss-120b46 combined provider routes
MoonshotAI: Kimi K3 vs OpenAI: gpt-oss-120b46 combined provider routes
MoonshotAI: Kimi K2.6 vs OpenAI: gpt-oss-120b42 combined provider routes
DeepSeek: DeepSeek V4 Flash 0423 vs OpenAI: gpt-oss-120b38 combined provider routes
DeepSeek: DeepSeek V4 Pro 0423 vs OpenAI: gpt-oss-120b38 combined provider 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="openai/gpt-oss-120b",
    messages=messages,
)

Questions

Which should I use, OpenAI: gpt-oss-120b or GLM 4.5 Air?

Is OpenAI: gpt-oss-120b or GLM 4.5 Air cheaper?

The current cheapest TrustedRouter route is $0.211/1M for OpenAI: gpt-oss-120b and $1.0339/1M for GLM 4.5 Air. The comparison uses current catalog prices and updates as provider pricing changes.

Is OpenAI: gpt-oss-120b or GLM 4.5 Air faster?

Current measured p50 time to first token is 1035 ms for OpenAI: gpt-oss-120b and not enough data for GLM 4.5 Air. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test OpenAI: gpt-oss-120b and GLM 4.5 Air with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between openai/gpt-oss-120b and zai-org/glm-4.5-air. This makes side-by-side evals possible without maintaining two provider integrations.