{"model":"deepseek-4.1-flash","title":"Full 1M-token context validated","status":"positive","summary":"Needle planted at 50% depth in a 1,048,576-token prompt recalled exactly: NEEDLE-885440-X (wall 1113 s, prefill-dominated). The service genuinely uses its advertised context.","occurred_at":"2026-09-11T09:21:00Z","found":["1M needle exact; long-context set now 12/12 at 4k-512k plus 1/1 at full 1M"]}