Free {family} model via API
Upstage's Solar models are efficient LLMs with strong multilingual and document-understanding performance.
1 model1 providerup to 524K contextbest: Solar Pro 4Updated:
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The table refreshes hourly from aggregator APIs. The same model at different providers is a separate endpoint with its own limits.
Benchmarks: Artificial Analysis (September 24, 2026). A dash means the model is not on their leaderboard; we never estimate scores ourselves.
About Solar
Upstage
Upstage's Solar models are efficient LLMs with strong multilingual and document-understanding performance.
FAQ
Which Solar models are free?
Currently 1 model are free: Solar Pro 4.
Where can I get a free Solar API key?
Free Solar routes are available at: Nous Portal. Get a key in the provider's dashboard; links are on each model card.
Who develops Solar?
Upstage's Solar models are efficient LLMs with strong multilingual and document-understanding performance.