AI models, limits and data policy

The catalogue lists the models Sylphx AI serves. The model pages show it in full — context window, maximum output, data policy and a ready-to-copy request for every model — and read it from the same catalogue this API serves, so the page and the API cannot disagree.

#Listing models

Two doors serve the catalogue: one for your key, one public.

curl https://api.sylphx.ai/v1/models \
  -H "Authorization: Bearer $SYLPHX_API_KEY"

# One model document:
curl https://api.sylphx.ai/v1/models/openai/gpt-5.5 \
  -H "Authorization: Bearer $SYLPHX_API_KEY"

curl https://api.sylphx.ai/v1/public/models

# One public model, including its description:
curl https://api.sylphx.ai/v1/public/models/openai/gpt-5.5

#Switching models

Because model is a field, a switch is a one-line change. The request and stream shape stay identical.

{
  "model": "qwen/qwen3.8-flash",
  "input": "Summarise this incident report in three bullets."
}

Read the new model's page first: context window, maximum output and data policy can differ. A conversation that used provider-sealed state should stay on the family that produced it; see switching models safely.

#Data policy

Each catalogue row publishes the default routing posture for that model: whether API data may be used for training, and whether zero data retention (ZDR) applies. By default, requests route to zero-data-retention routes.

• train and zdr are booleans describing that default. zdr is false when no ZDR route exists for the model.
• posture is standard or consent_trained; source is model_declaration or default; default_routing is zdr_required.
• training_opt_in is true when lower-cost options that may train on data exist for the model. They are reached only when the caller sends x-sylphx-zdr: optional; without that header a request never uses them.
• The posture belongs to the model row, not to your key, so switching models can change it. Check it before you move a sensitive workload.
• Retention of stored responses and files is separate; see the privacy policy.