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Spec
Anthropic
Z.ai
Params—321B
Architecture—dense
Context1M1.3M
License
License terms—MIT License
—202.6 GBest
Cheapest hosted (out/1M)$25.00 · Anthropic$0.50 · Relace
ReleasedApr 16, 2026Aug 25, 2026
LiveBench76.5371.59
LiveBench Agentic Coding50.6656.77
LiveBench Coding82.0978.95
LiveBench Data Analysis78.2676.4
LiveBench Instruction Following66.7452.82
LiveBench Language77.9177.31
LiveBench Mathematics92.8581.24
LiveBench Reasoning87.1977.64
Arena Agent7th of 5527th of 55
Arena Agent · Recoverygets back on track after a command fails7th of 5540th of 55
Arena Agent · Steerabilitydoes what it was asked, and changes course when told7th of 5527th of 55
Arena Agent · Task outcomefinishes what the session set out to do21st of 5511th of 55
Arena Agent · Tool usereaches for the right one, and does not invent one6th of 559th of 55
Arena Coding15471523
Arena Creative Writing14841433
Arena Hard Prompts15201499
Arena Instruction Following14941474
Arena Maths14921501
Arena Text (overall)14951474
Arena Code (WebDev)15561613

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