Solar Open 100B (Reasoning)
Analysis Summary
Solar Open 100B (Reasoning) delivers moderate performance across reasoning and instruction-following benchmarks, positioning it as a mid-tier open option from Upstage.
It can support general business writing and moderate reasoning tasks reasonably well, but its coding and agentic capabilities remain underdeveloped relative to leading models, limiting its use for technical automation.
As an open model, it offers flexibility for self-hosting, appealing to teams prioritizing control and customization over peak capability.
Assessed July 29, 2026
Editorial notes
Solar Open 100B (Reasoning) from Upstage offers moderate reasoning depth with decent instruction-following for an open model.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Solar Open 100B (Reasoning) from Upstage offers moderate reasoning depth with decent instruction-following for an open model.
Benchmark scores
Magenta = intelligence · Ink = technical/agentic · Cyan = content & long-context · Grey = community benchmarks. Data: Artificial Analysis, Hugging Face.
15.1 Intelligence Index
How Solar Open 100B (Reasoning) compares
Solar Open 100B (Reasoning) ranks #186 of 401 AI models we track for overall intelligence. Solar Open 100B (Reasoning) is currently free to use via OpenRouter.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on content. The pulled-in value corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Frequently asked questions about Solar Open 100B (Reasoning)
How much does Solar Open 100B (Reasoning) cost?
Solar Open 100B (Reasoning) is currently available for free via OpenRouter.
Who created Solar Open 100B (Reasoning)?
Solar Open 100B (Reasoning) is developed by Upstage and was released on December 17, 2025.
