Unisound U2

Name: Unisound U2
Author: Unisound

Released

2026-06-08

Last refreshed

2026-06-29

Status

Researched 91d ago

ProprietaryCommercial use: conditionalCodingAgentsJSON / Tool useChina

Unisound U2 is worth evaluating for coding, agents, and json / tool use when its provider route and context window match the workload.

Use it for

Teams evaluating coding, agents, and json / tool use
Buyers comparing 1 tracked provider route

Do not use it for

Vision or document-understanding workloads

Specifications

Family: Unisound U2
Released: 2026-06-08
Parameters: 266B
Architecture: Mixture of Experts
Specialization: general
Openness: Proprietary
License: ProprietaryCommercial use: conditional
Weights: Not released
Code: Unknown
Training: Pretrained

Created by

Unisound

Unisound (云知声) is a Chinese AI company founded in 2012, specializing in voice AI and large language models. Best known f

Beijing, China

Founded 2012

Website

Pricing

Output / 1M

Input / 1M

Cheapest of 1 route · Unisound Token Hub

Providers(1)

Unisound Token Hub

View 1 provider route

Links

Website

About

Unisound U2 is a native agentic large language model announced June 8, 2026, by Chinese AI company Unisound (云知声). Designed for multi-step autonomous task execution, it uses native reasoning-path distillation for task decomposition, execution, verification, and optimization. The official Token Hub page lists a sparse MoE architecture with 266B total parameters and 10B active parameters, plus API access through Unisound Token Hub. Emphasis is on coding, tool orchestration, and long-horizon agent workflows. Unisound self-reports GPQA Diamond 87.9, SWE-bench Verified 75.0, and Claw-Eval 76.9; treat those benchmarks as vendor-reported until independently verified. Context window is not disclosed.

Top use-case fit: coding, agents, and build tasks

Coding

1 relevant benchmark in the decision map.

Agents

1 relevant benchmark in the decision map.

JSON / Tool use

Included by capability and metadata signals in the decision map.

Provider price ladder

Compare API pricing across 1 providers for input and output tokens, batch, and cached reads when available.

Provider	Input / 1M	Output / 1M	Route
Unisound Token Hub	-	-	ServerlessPartial

Capabilities

ReasoningJSON / Tool use

Benchmark peer barsfor Coding

SWE-bench VerifiedRank 42 of 81

Claude Fable 5

96.0

Claude Opus 5

96.0

Claude Mythos Preview

93.9

Claude Opus 4.8

88.6

Unisound U2current

75.0

Benchmark scores(2)

Scores are benchmark-specific and are direction-aware: the same numeric gap can mean very different outcomes across suites. Use the leaderboard context and this model's provider route to decide whether the winning margin is meaningful for your workload.