Upstage’s Solar Open 2 posts strong coding and reasoning scores against DeepSeek-V4-Flash

Lucidstyle · reddit · 2026-07-22

Upstage has released Solar Open 2 and is positioning it as competitive with much larger frontier models, including DeepSeek-V4-Flash.

• The benchmark table highlights strong results on reasoning and coding, including MMLU-Pro 86.2, LiveCodeBench 92.4, and SWE-Bench Verified 70.4.
• It also shows mixed results across agent-style and long-context tests: Solar Open 2 leads or stays near the top on several suites, while DeepSeek-V4-Flash still edges it out on some reasoning and agent benchmarks.
• The post frames the release as a broad performance claim rather than a narrow niche win.

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