Solar Pro 4

Solar Pro 4 is an artificial intelligence model developed by Upstage, released on August 6, 2026. In performance evaluations, the model achieved an intelligence index of 41.6 and a coding index of 52.7. Benchmark results for the model include a GPQA score of 0.891, an HLE score of 0.292, a SciCode score of 0.436, and an LCR score of 0.706666666666667. Regarding operational speed, Solar Pro 4 demonstrates an output speed of 67.344 tokens per second with a time to first token of 1.238 seconds. Pricing for the model is structured at $0.30 per 1 million input tokens and $1.20 per 1 million output tokens, resulting in a blended rate of $0.53 per 1 million tokens.