Claude Sonnet 5.5 appeared in openrouter
model_release · 2026-09-28T18:04:46.000Z
Source ↗Anthropic · active
1,000,000 token context · anthropic/claude-sonnet-5.5
View Anthropic in Atlas →Model timeline
Bounded, independently loaded observations and the stories behind them.
Model record
Loading this timeline lane…
Model record
Loading this timeline lane…
Model record
Loading this timeline lane…
Model record
Loading this timeline lane…
Model record
Loading this timeline lane…
Model record
Collector releases and news-derived announcements, clearly labeled by confirmation state.
model_release · 2026-09-28T18:04:46.000Z
Source ↗Model record
Human-readable benchmark results with rank and score.
Model record
Sourced per-million-token rates over time.
2026-09-28T21:54:34.107Z · openrouter
2026-09-28T21:21:10.833Z · openrouter
2026-09-28T20:25:28.553Z · openrouter
2026-09-28T18:39:29.180Z · openrouter
Model record
Adoption observations in their original metric context.
Model record
Stories and source evidence attached to model announcements.