System record

Opus 5.5 (max) / TasteVal

Organization: Anthropic · base model: Opus 5.5, Opus 4.8 (fixed Coder)

System and setup

Reported system information
Model versionOpus 5.5 (max)
Software used to run the modelTasteVal ReAct
Software versionarXiv:2610.06824v1
Tools available to the modelFixed Opus 4.8 Coder, two monitors and liaison; one H100; internet and experimental reports.
Release dateNot reported

Autonomy assessments

No autonomy assessment is published for this system.

Published capability results

Benchmark and indicator evidence
MeasureVersionReported resultDate
TasteValOctober 2026 paper v1 · 20-model main cohort2.30×2026-10-05
TasteValOctober 2026 paper v1 · 20-model main cohort1.14×2026-10-05

Related research

Additional system details
System ID
tasteval-opus55
Organization
Anthropic
Base model
Opus 5.5, Opus 4.8 (fixed Coder)
Release date
Not reported
Assessment records
0
Recursive evidence records
0