ModelRadar
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What shipped in AI.

Releases from frontier labs, major companies and research institutes — grouped by model, deduplicated across HuggingFace, OpenRouter and official blogs.

Releases per weekFrontierMajor labResearch
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Week of September 21, 20261 model

Solar Mini 4

Upstage🇰🇷Major lab

TextReasoningAPI

Solar 4 is a model family by Upstage. The Pro variant supports a context window of 512K tokens and is available via OpenRouter under the ID upstage/solar-pro4.

⧉ 524K$0.05 / $0.2OR

Week of August 10, 20261 model

Solar Pro 4

Upstage🇰🇷Major lab

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Solar 4 is a model family by Upstage. The Pro variant supports a context window of 512K tokens and is available via OpenRouter under the ID upstage/solar-pro4.

⧉ 524K$0.09 / $0.36OR

Week of July 20, 20261 model

Solar-Open2

Upstage🇰🇷Major lab

Textopen

Upstage open-weight MoE model (250B total, 15B active per token) aimed at agentic tasks such as tool calling, document work and coding. The model card reports 70.4 on SWE-Bench Verified, behind MiMo-V2.5 (73.0) and DeepSeek-V4-Flash (73.8).

1 variant250B