Catalog Changes
Version history starts when recording is enabled. Versions are created when reported values, array items or listing availability change. Array differences align positions, not inferred identities. The first observation is a baseline; unchanged downloads update last observation time.
Catalog Changes
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Anthropic: Claude Opus 5.5 · 2026-10-15 06:04:01.957457 UTC
Current Model ListingOpenRouter
11 Changed Fields
Field / Array Position Previous Value Observed Value Benchmarks · Design Arena[1] · Win Rate 72.2 72.1 Benchmarks · Design Arena[3] · Win Rate 64.7 64.8 Benchmarks · Design Arena[4] · Rank 1 2 Benchmarks · Design Arena[5] · Elo 1333 1332 Benchmarks · Design Arena[5] · Win Rate 51.5 51.8 -
Anthropic: Claude Opus 5.5 · 2026-10-14 18:04:40.082408 UTC
Current Model ListingOpenRouter
10 Changed Fields
Field / Array Position Previous Value Observed Value Benchmarks · Design Arena[1] · Rank 2 1 Benchmarks · Design Arena[1] · Win Rate 72 72.2 Benchmarks · Design Arena[2] · Elo 1393 1392 Benchmarks · Design Arena[2] · Win Rate 63.9 63.8 Benchmarks · Design Arena[3] · Elo 1398 1400 -
Anthropic: Claude Opus 5.5 · 2026-10-14 00:05:14.055870 UTC
Current Model ListingOpenRouter
12 Changed Fields
Field / Array Position Previous Value Observed Value Benchmarks · Design Arena[0] · Elo 1328 1327 Benchmarks · Design Arena[0] · Win Rate 64.3 64.2 Benchmarks · Design Arena[1] · Elo 1474 1479 Benchmarks · Design Arena[1] · Rank 3 2 Benchmarks · Design Arena[1] · Win Rate 71.7 72 -
Anthropic: Claude Opus 5.5 · 2026-10-13 18:02:12.899941 UTC
Current Model ListingOpenRouter
11 Changed Fields
Field / Array Position Previous Value Observed Value Benchmarks · Design Arena[1] · Elo 1476 1474 Benchmarks · Design Arena[1] · Rank 2 3 Benchmarks · Design Arena[1] · Win Rate 71.8 71.7 Benchmarks · Design Arena[3] · Elo 1400 1399 Benchmarks · Design Arena[3] · Win Rate 64.5 64.4 -
Anthropic: Claude Opus 5.5 · 2026-10-13 03:20:45.850809 UTC
Current Model ListingOpenRouter
First recorded baseline; no earlier history is available.