OpenAI compatible API · Attested · Public status

Google: Gemini 3.5 Flash vs OpenAI: GPT-5.6 Terra

Compare Google: Gemini 3.5 Flash and OpenAI: GPT-5.6 Terra by providers, context, price, and TrustedRouter route support.

Verify gateway
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

Google: Gemini 3.5 Flash has the lower cheapest prompt+completion route on TrustedRouter. Google: Gemini 3.5 Flash has more provider fallback routes, while OpenAI: GPT-5.6 Terra has the larger context window. Current TrustedRouter probes show OpenAI: GPT-5.6 Terra with the lower p50 TTFT.

$11.025/1MGoogle: Gemini 3.5 Flash cheapest route
$18.375/1MOpenAI: GPT-5.6 Terra cheapest route
4623 msGoogle: Gemini 3.5 Flash measured p50 TTFT
1837 msOpenAI: GPT-5.6 Terra measured p50 TTFT
Google: Gemini 3.5 FlashOpenAI: GPT-5.6 Terra
Model idgoogle/gemini-3.5-flashopenai/gpt-5.6-terra
PublisherGoogle AI StudioOpenAI
Context1,048,576 tokens1,050,000 tokens
Provider routes76
Cheapest route$11.025/1M$18.375/1M
Privacy postureprovider posture variesprovider posture varies
Modes chat chat

Google: Gemini 3.5 Flash routes

OpenAI: GPT-5.6 Terra 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="google/gemini-3.5-flash",
    messages=messages,
)
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