Upstage

Upstage's official newsroom provides a dated index of corporate and product announcements, most recently the August 20, 2026 unveiling of Solar Pro 4, which scored 42 on the Artificial Analysis Index to rank among global frontier models. Earlier entries in 2026 include the April 23, 2026 Stevie Awards honor and the Mar Older 2025 entries include the December 17, 2025 year-in-review marking Upstage's U.S. launch, the November 21, 2025 METI certification of the jointly co-developed Syn Pro model with Karakuri as a domestic Japanese foundation model, the August 20, 2025 $45M Series B bridge, and an August 19, 2025 AWS partnership for AP

Upstage announced the beta release of Solar, its pre-trained large language model, on February 22, 2024, making it freely available through an API until March 31, 2024. The release positioned Solar as topping the Open LLM Leaderboard on Hugging Face in December 2023 and achieving GPT-3.5-comparable performance with few The beta launch also featured an English-Korean translation API that Upstage claimed surpassed GPT-4 and DeepL in quality through a context-aware approach, plus the Solar LLM Innovators Award offering up to 10 companies or organizations $200,000 worth of Solar API credits for impactful business use cases. The page also

Upstage introduced Solar Pro 4, its agent-focused flagship LLM, with a launch promotion of 90% off on Upstage Console and OpenRouter through September 10. The blog positions Solar Pro 4 around carrying real multi-step work to completion—reading documents, running tools, and producing deliverables—and explicitly contras Solar Pro 4 supports a 512K context window with up to 128K output tokens and handles English, Korean, and Japanese for both input and output, with an adjustable reasoning-effort dial trading depth for latency. On agentic evaluations reported by Artificial Analysis as of August 2026, Upstage cites Terminal-Bench v2.1 at

Opper AI's release tracker compiles dated Upstage model launches, most recently Solar Open2 250B on August 12, 2026, followed by Solar Pro 4 on August 6, 2026. The tracker records an Artificial Analysis Intelligence score of 29 for Solar Open2 250B and 33 for Solar Pro 4, while noting that none of the seven listed Upst Earlier entries include Solar Pro 3 in April 2026 (Intelligence score 9), Solar Open 100B on December 17, 2025 (score 9), Solar Pro 2 on July 9, 2025 (score 2), Solar Pro 2 Preview on May 20, 2025 (score 4), and Solar Mini on January 25, 2024 (score 1). The tracker attributes release dates and intelligence scores to Ar

Artificial Analysis reports that Korean AI lab Upstage released Solar Pro 4 on August 12, 2026, scoring 42 on the Artificial Analysis Intelligence Index, a 27-point jump over Solar Pro 3's score of 14. Solar Pro 4 is described as Upstage's new proprietary flagship reasoning model, replacing Solar Pro 3 from April 2026, The analysis highlights Solar Pro 4's largest gains on agentic and long-context work, with Terminal-Bench v2.1 rising from 12% to 57%, AA-LCR from 31% to 71%, and τ³-Banking from 9% to 23%, plus a GDPval-AA v2 Elo jump from 498 for Solar Pro 3 to 1277 for Solar Pro 4 against a 1000 human baseline. AA-Omniscience improv

Notice.co's profile describes Upstage AI, Inc. as a developer of enterprise AI software that includes the Solar large language model and a Document AI suite for OCR and data extraction, with products offered through cloud and API-based deployment for turning unstructured documents into structured data and building AI a The profile notes that Upstage stock is not currently traded in the private markets, transferability is unknown, and the Upstage 2026 valuation has not been disclosed following a $120 million Series C round in April 2026 led by Sage Partners. It positions Upstage within the Infrastructure Software and AI Workflow categ