U2: API Pricing, Context Window & Benchmarks
U2 is a language model from Unisound, released in June 2026.
Unisound has launched its next-generation flagship model, Unisound U2, built around three core advances: high intelligence density, high token efficiency, and a native agent architecture. Through refined data curation and dense semantic
U2 pricing
Providers
U2 starts at $0.150 per million input tokens and $0.300 per million output tokens via Unisound. Reused prompt prefixes cost $0.0030 per million cached input tokens.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p50 / p95 s | Output avg / p5 c/s | Success 7d | Modalities in / out |
|---|---|---|---|---|---|---|---|---|
 Unisound | $0.150 | $0.0030 | $0.300 | —/— | 0.00/0.00 | —/— | 0.00%(20) | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests. Success is calculated from completed versus failed requests over the trailing seven days.
U2 API
Available from the model provider
U2 has an official provider API. It is not currently routed through the LLM Stats gateway.
Read the official API documentationU2 latency
U2 time to first token, sustained output throughput, and failed-request rate from live API traffic over the trailing 7 days.
Provider operational metrics
Time to first token, output throughput, and failed-request rate from live API traffic
U2 examples
Recent arena outputs from U2, picked from the highest-ranked matchups.
U2 license
U2 is a proprietary model available under its provider's product and API terms, has 266.0B parameters, has a knowledge cutoff of January 2026.
- License
- Proprietary
- Hosted access
- Parameters
- 266.0B
- Knowledge cutoff
- January 2026
Proprietary license - usage restrictions apply
U2 resources
Official sources for U2: api documentation.
FAQ
Common questions about U2.