OpenAI compatible API · Attested · Public status

OpenAI: gpt-oss-120b vs Qwen 3.5 35B A3B

gpt-oss-120b vs Qwen 3.5 35B A3B: 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

OpenAI: gpt-oss-120b has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: gpt-oss-120b has more provider fallback routes, while Qwen 3.5 35B A3B has the larger context window. Probe-backed speed data is shown when enough recent samples exist.

$0.21735/1MOpenAI: gpt-oss-120b cheapest route

$1.640625/1MQwen 3.5 35B A3B cheapest route

969 msOpenAI: gpt-oss-120b fastest measured p50 TTFT via parasail

not enough dataQwen 3.5 35B A3B fastest measured p50 TTFT

OpenAI: gpt-oss-120bQwen 3.5 35B A3B

Model idopenai/gpt-oss-120bqwen/qwen3-5-35b-a3b

Publisher OpenAI Venice

AI IQ IQ 105#53 —

Context131,072 tokens256,000 tokens

Provider routes262

Cheapest route$0.21735/1M$1.640625/1M

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT969 ms via parasailnot enough data

Highest measured throughputnot enough datanot enough data

Recent route uptime range85.71% to 100.00%100.00%

Modes chat chat

OpenAI: gpt-oss-120b routes

Overview26 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

Qwen 3.5 35B A3B routes

Overview2 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

Related comparisons

Browse every comparison

OpenAI: gpt-oss-120b vs Z.ai: GLM 5.273 combined provider routes
MoonshotAI: Kimi K3 vs OpenAI: gpt-oss-120b59 combined provider routes
MoonshotAI: Kimi K2.6 vs OpenAI: gpt-oss-120b56 combined provider routes
DeepSeek: DeepSeek V4 Flash 0423 vs OpenAI: gpt-oss-120b55 combined provider routes
DeepSeek: DeepSeek V4 Pro vs OpenAI: gpt-oss-120b53 combined provider routes
Google: Gemma 4 31B vs OpenAI: gpt-oss-120b50 combined provider routes
OpenAI: gpt-oss-120b vs Z.ai: GLM 5.150 combined provider routes
DeepSeek: DeepSeek V4 Flash 0731 vs OpenAI: gpt-oss-120b46 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 Qwen 3.5 35B A3B?

Is OpenAI: gpt-oss-120b or Qwen 3.5 35B A3B cheaper?

The current cheapest TrustedRouter route is $0.21735/1M for OpenAI: gpt-oss-120b and $1.640625/1M for Qwen 3.5 35B A3B. The comparison uses current catalog prices and updates as provider pricing changes.

Is OpenAI: gpt-oss-120b or Qwen 3.5 35B A3B faster?

Current measured p50 time to first token is 969 ms for OpenAI: gpt-oss-120b and not enough data for Qwen 3.5 35B A3B. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test OpenAI: gpt-oss-120b and Qwen 3.5 35B A3B 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 qwen/qwen3-5-35b-a3b. This makes side-by-side evals possible without maintaining two provider integrations.