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Mercury 2.5

Inception Labs · 2026-09-08

Inception Labs' September 8, 2026 diffusion language model for text reasoning, coding and agent workloads, with parallel tool calling and schema-aligned JSON output. It supports tunable reasoning and advertises a 260K-token context with up to 65,536 output tokens. The exact parameter count and an unrounded context limit are not published in the reviewed model documentation.

Benchmark scores

BenchmarkScore
AA-Briefcase v1.1 Elo378
AA-LCR v1.171.7
AA-Omniscience Index-39.5
Artificial Analysis Intelligence Index v4.3.212.3
Artificial Analysis Omniscience Accuracy22.6
Artificial Analysis Omniscience Hallucination Rate80.3
Artificial Analysis Progress Index v1239
AutomationBench-AA 1.0.62.4
BuseyBench SVG3.1
Capability140.0
Code Migration4.5
Code Migration - CLI6.0
Code Migration - COBOL0.0
Code Migration — Code Quality2.7
Code Migration (Vals Index v2 subset)4.9
CritPt (avg@5)0.0
CyberBench v1.1 Overall45.5
CyberBench v1.1 Patch64.3
CyberBench v1.1 PoC26.7
Excel Modeling Benchmark8.8
Excel Modeling Benchmark Comps11.5
Excel Modeling Benchmark Dataroom15.5
Excel Modeling Benchmark DCF4.7
Excel Modeling Benchmark LBO8.3
Excel Modeling Benchmark M&A6.3
Excel Modeling Benchmark Misc12.5
Excel Modeling Benchmark Operating2.6
Excel Modeling Benchmark Scratch12.4
Excel Modeling Benchmark Template4.8
Finance Agent v218.9
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