Is Claude Opus 5.5 SOTA in Factuality?
Co-SOTA · FactualityClaude Opus 5.5 is tied for SOTA in Factuality with Gemini 4 Argon, Claude Fable 5.1, within the margin of error, since 2026-10-02.
Standings
Factuality
| # | Model | State |
|---|---|---|
| 1 | Gemini 4 Argon | Co-SOTA |
| 1 | Claude Opus 5.5 | Co-SOTA |
| 1 | Claude Fable 5.1 | Co-SOTA |
| 3 | Claude Opus 4.6 | Near-SOTA |
| 4 | Claude Opus 5 | Near-SOTA |
| 1 | Muse Wonder | Pending |
| 5 | GPT-5.5 | Was SOTA |
| 6 | GPT-5.4 | Was SOTA |
| 7 | Claude Fable 5 | Was SOTA |
| 8 | Mimo V2.6 Pro | #8 in this category |
| 9 | Muse Spark 1.2 | Was SOTA |
| 10 | Gemini 3 Pro | Was SOTA |