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Upstage: Solar Open 100B

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solar-open-100b

Solar Open 100B is Upstage’s proprietary AI model, released Dec 31, 2025.

Context
—
Input
— / 1M
Output
— / 1M
Released
Dec 31, 2025
Modalities

Benchmarks

Scores on standardized evaluations. Higher is better — and rank shows where Solar Open 100B lands among all models tracked on Model Beat.

10.0
Intelligence Index
Artificial Analysis
10th percentile of tracked models
4.0
Coding Index
Artificial Analysis
4th percentile of tracked models
17.0
Agentic Index
Artificial Analysis
17th percentile of tracked models

Reasoning

2 evals
GPQA Diamond65.7%

Graduate-level scientific reasoning

Humanity's Last Exam9.2%

Frontier of human expert knowledge

Coding

1 evals
SciCode26.9%

Scientific research coding

Agentic & Tools

1 evals
τ²-bench48.2%

Tool-agent-user reliability

Compare Solar Open 100B with

Solar Open 100B vs GPT-5.6 SolSolar Open 100B vs Claude Fable 5Solar Open 100B vs Gemini 3.1 ProSolar Open 100B vs Muse SparkSolar Open 100B vs Grok 4.5

Frequently asked questions

What is Solar Open 100B?

Solar Open 100B is an AI model, from Upstage, released Dec 31, 2025.

Who created Solar Open 100B?

Solar Open 100B is an AI model developed by Upstage, released Dec 31, 2025.

How does Solar Open 100B perform on benchmarks?

On standardized evaluations tracked by Epoch AI, Solar Open 100B scores 48.2% on τ²-bench, 9.2% on Humanity's Last Exam, 26.9% on SciCode.

Is Solar Open 100B open source?

Solar Open 100B is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.

Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 30, 2026.