3 across 1 category board · 2 without a live endpoint · 1 superseded · upstage.ai
ModelCap tracks 6 canonical Upstage models as of 22 September 2026: 6 language models (3 with a public ModelCap Index position). Superseded versions and equivalent serving routes stay listed on this page, marked as such.
Solar Open2 250B is Upstage's highest-ranked model as of 22 September 2026, at ModelCap Index position #49 with a score of 65.0, followed by Solar Pro 4 (#110). The table lists every ranked Upstage model in Index order.
Solar Pro 4 at $0.36 per 1M output tokens ($0.09 per 1M input) as of 22 September 2026, the lowest listed price among Upstage's 2 priced language models. Prices are the lowest current provider offer on the OpenRouter catalogue.
Solar Pro 4, with a published context window of 524K tokens. Individual providers can serve less than the published maximum; each model page lists every endpoint's own limit.
2 of 6 tracked Upstage models publish downloadable weights (open weights or gated access). ModelCap labels weight availability from repository metadata, not whether the training stack is open source; the licence class is shown beside each row.
Solar Pro 4, first listed on 10 August 2026 and currently ModelCap Index #110. New Upstage models appear here as soon as they pass automatic identity checks; the launches page tracks releases across every publisher.