Upstage Solar Pro 4 Review: High Intelligence but Notably Slow

ArtificialAnlys · x · 2026-08-13

Upstage's Solar Pro 4 scores 42 on the Artificial Analysis Intelligence Index, ranking 12th out of 165 models and demonstrating above-average intelligence.

However, the model has notable drawbacks: an output speed of only 62.3 tokens/sec (ranking 109/165) and high verbosity (160M tokens). It is priced at $0.30 / 1M input tokens and $1.20 / 1M output tokens, supporting a 384k context window.

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