Fetching from the wire…
01
02
03
04
05
06
07
08
Models2026-08-11 · source-backed
sshh's August 10 analysis probed Opus 4.7 and 5 plus Sonnet variants against GPT-5.x using 8-way multiple choice on daily Wikipedia facts, direct self-reported date queries, and 50 "what model are you?" probes. Inferred cutoffs: late December 2025 for Opus 4.7+, late February 2026 for GPT-5.6. The author also reports clear signatures of labs training on prior-model outputs and user conversations, with Sonnet 5 regularly self-identifying as GPT-4. If you're relying on a stated cutoff for anything that matters, verify it against facts you know the date of.
Each link below shares sources, entities, or timing with this story.
Claude Code uses Sonnet / Shared entities / Shared topic / Earlier coverage / Tension
Linked by a graph relationship (Claude Code uses Sonnet); both cover GPT, Sonnet; overlapping topics (against, gpt-5, sonnet).
Linked by a graph relationship (Claude Code uses Sonnet); both cover GPT, Opus; overlapping topics (gpt-5, opus).
Linked by a graph relationship (Claude Code uses Sonnet); both cover Opus, Sonnet; overlapping topics (opus, sonnet).
GPT competes with Claude / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (GPT competes with Claude); both cover February, GPT, Sonnet; overlapping topics (around, date).
Linked by a graph relationship (GPT competes with Claude); both cover February, GPT, Opus; overlapping topics (gpt-5, opus).
Claude Code uses Sonnet / Shared entities / Earlier coverage
Linked by a graph relationship (Claude Code uses Sonnet); both cover August, GPT, Sonnet; earlier August coverage from 2026-08-09.
Linked by a graph relationship (Claude Code uses Sonnet); both cover GPT, Opus, Sonnet; earlier GPT coverage from 2026-07-30.
Linked by a graph relationship (Claude Code uses Sonnet); both cover August, GPT, Opus; earlier August coverage from 2026-05-28.