model_archive

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Dated archive of LLM prices, context windows, announced retirement dates and quiet delistings across 400+ models and 50+ providers. Providers overwrite their pricing pages and drop models from their catalogs without publishing what changed. This endpoint keeps a daily record, so three otherwise unanswerable questions become answerable: what a model cost on a given date (a contract and budget question), which models were quietly removed (a dependency-audit question), and when a retirement date was first announced and whether it later moved (a migration-planning question). Price points land in the shared time series, so a full range query is available through `series/history` under `model.price.<provider>/<model>.<input|output|cache_read>`. The archive can only accumulate forward — it cannot be reconstructed after the fact.