Models
Thinking is on by default. Onlyholo4-27b has effort levels; reasoning_effort: "none" turns thinking off on every model. Every model takes up to 5 images per request (JPEG, PNG, WebP). Cached input is the part of a prompt served from the prompt cache. Pin a model ID in production: before one is removed, GET /v1/models sets its deprecation_date.
Benchmarks and methodology: Holo4, Holo3.1. Holo4 and Holo3.1 also ship as open weights for local inference, including sizes the API does not serve.
Quickstart
Get an API key
Generate a key on H Platform and export it.
Send a screenshot
holo4-27b.Images can be a URL or a base64 data URI. List the models your key can reach with GET /v1/models.Request options
Beyondmodel and messages, these are the fields that change Holo’s behavior. The rest are standard OpenAI sampling fields. The full list is in Chat completions.
Rate limits and credits
Free: 10 requests per minute onholo3-1-35b-a3b, no credit card. Paid: all models, higher limits, once you add credits.
Credits can take up to 15 minutes to appear. The Inference credits tab of the credit dashboard shows your balance and usage. The balance is checked before a request runs, so a large request on a low balance can overshoot by a few cents. Contact support@hcompany.ai if the overshoot keeps growing. Unused credits may expire one year after purchase and are not refundable by default, subject to regional obligations and the terms of use.