MODELS
Pricing and availability
The approved price of each model family per million tokens, and who can call what today.
Prices are in US dollars per one million tokens (price version commercial-v1-2026-10-25). The same numbers are published by GET /v1/pricing/families, which needs no key.
| Model | Model id | Input | Cached input | Output |
|---|---|---|---|---|
| Z1 | z1 | $1.50 | $0.15 | $6.00 |
| Z1 Code | z1-code | $2.00 | $0.20 | $5.00 |
| H1 | h1 | $8.00 | $0.80 | $30.00 |
READ THE LIVE PRICE LIST
curl https://api.tessen.ai/v1/pricing/familiesimport requests response = requests.get("https://api.tessen.ai/v1/pricing/families", timeout=30)response.raise_for_status()for family in response.json()["families"]: print(family["model_id"], family["uncached_input_usd_per_1m_tokens"], family["output_usd_per_1m_tokens"])const response = await fetch("https://api.tessen.ai/v1/pricing/families");if (!response.ok) throw new Error(`HTTP ${response.status}`);const { families } = await response.json();for (const family of families) { console.log(family.model_id, family.uncached_input_usd_per_1m_tokens, family.output_usd_per_1m_tokens);}Availability today
| Model | Availability | Billing |
|---|---|---|
z1, z1-code, h1 | Private pilot. The price endpoint reports availability: "pilot" and routable: false for the public. | Prepaid wallet, per token. |
project-zero | Private enrollment. | Free within the daily allowance. |
| Embeddings | Available to any account with a key. | Not metered: the response reports 0 tokens. |
Limit
Adding funds is not open to the public. The wallet's minimum top-up ($10.00) is published, but purchase is disabled for all accounts, and pilot accounts are funded by Tessen with a labelled testing credit. See Pilot and production access.