Solar Pro 4
Solar Pro 4Alternatives?
CheaperGLM 5.3 FlashunstatedOpenwins 67%-55%$0.15 / $0.50Defaults to max · Self-hosted+4
BetterGPT-6 Lunamaxwins 64%-62%$0.068Function calling only with none · Chat Completions+3
OpenKimi K3maxwins 71%+1,043%$2.00Sampling parameters are fixed+3
CheaperHy3unstatedOpenwins 66%-56%$0.13 / $0.53Context: 524K → 256K
CheaperGemma 4 31BunstatedOpenwins 65%-70%$0.10 / $0.34Context: 524K → 256KGLM 5.3 FlashunstatedOpenwins 67%-55%$0.15 / $0.50Defaults to max · Self-hosted+4Hy3unstatedOpenwins 66%-56%$0.13 / $0.53Context: 524K → 256KGemma 4 31BunstatedOpenwins 65%-70%$0.10 / $0.34Context: 524K → 256KGPT-6 Lunamaxwins 64%-62%$0.068Function calling only with none · Chat Completions+3GPT-5.6 Lunaxhighwins 64%-14%$0.085GPT-6 Lunamaxwins 64%-62%$0.068Function calling only with none · Chat Completions+3GPT-5.6 Lunaxhighwins 64%-14%$0.085GPT-5.6 Terraxhighwins 67%+757%$0.63Prompts with >272K input tokensGPT-6.1 Solmaxwins 70%+662%$0.72Remove unsupported parameters+5
Muse Spark 1.2xhighwins 69%+281%$0.97Only auto tool_choice is supported+1Kimi K3maxOpenwins 71%+1,043%$2.00Sampling parameters are fixed+3GLM 5.2maxOpenwins 70%+310%$1.47GLM 5.3maxOpenwins 70%+310%$2.01Reasoning cannot be disabled+3GLM 5unstatedOpenwins 69%+195%$1 / $3.20Context: 524K → 203KGLM 5.1unstatedOpenwins 69%+310%$1.40 / $4.40Context: 524K → 203KBenchmarks
in Writing & LanguageFAQ
How much does Solar Pro 4 cost?›
$0.30 per 1M input tokens and $1.20 per 1M output tokens; cached input $0.06 per 1M. A typical benchmark task costs about $0.71 at default effort.
Is Solar Pro 4 free to use?›
There is no free API; the cheapest paid price is $0.30 per 1M input tokens.
How good is Solar Pro 4, and what is it best at?›
#81 of 334 in Chat & Knowledge, #75 of 132 in Coding, #72 of 133 in Agents & Tool Use, #124 of 195 in Writing & Language, #73 of 133 in Vision & Documents. Strongest at: Reasoning, Science, Knowledge.
Is Solar Pro 4 better than DeepSeek v2.5?›
On Arena Text · creative writing, Solar Pro 4 scores 1,309 vs 1,310 — about the same.
How can I use Solar Pro 4?›
Through the Upstage API.
What is the context window of Solar Pro 4?›
524K tokens, with up to 131K output tokens.
When was Solar Pro 4 released? Is there a newer version?›
Released 2026-08-06. It is the current version in its line.
Is Solar Pro 4 open source?›
No, Solar Pro 4 is a closed model available through an API. The closest open-weights option here is Kimi K3.
Can Solar Pro 4 read images?›
No, it accepts text only.
What is Solar Pro 4?›
Solar Pro 4 is a closed language model from Upstage, released Aug 2026.
What are the best alternatives to Solar Pro 4?›
GLM 5.3 Flash (cheaper), GPT-6 Luna (better), Kimi K3 (open weights).