Solar Pro 4

Tools

upstage/solar-pro4

Text · 524K context · Aug 2026 · 7 upstreams

Solar Pro 4 is Upstage's cost-efficient large language model with a 524K context window. It is built for long-horizon tasks and agentic workflows, and supports function calling and reasoning with text input and output.

Needs your own keyTo use Solar Pro 4, add a key from OpenRouter, AIHubMix, Nous Research or 4 more. AnyRouter adds no fee.

context: 524K
input / 1M (list): $0.03
output / 1M (list): $0.12
routes: 7
speed, 24h: No data yet

Upstreams

Sort

1OpenRouterYour keynot addedBilled to your key
2AIHubMixYour keynot addedBilled to your key
3Nous ResearchYour keynot addedBilled to your key
4AI/ML APIYour keynot addedBilled to your key
5NanoGPTYour keynot addedBilled to your key
6FluenceYour keynot addedBilled to your key
7KT Token FactoryYour keynot addedBilled to your key

Quick start

curl

curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "upstage/solar-pro4",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'

Details

Owner: Upstage
Kind: Chat
Released: Aug 2026
Context: 524K
Data policy: Provider retention
Endpoint: /api/v1/chat/completions

Tool-calling assistants
Math and reasoning
Long-document Q&A (524K)

Upstreams and pricing


Your own key (BYOK) — provider bills you, $0 AnyRouter fee
	0.03 list	0.12 list	—	524K
	0.03 list	0.12 list	—	524K
	0.09 list	0.36 list	—	524K
	0.10 list	0.38 list	—	512K
	0.15 list	0.60 list	—	524K
	0.30 list	1.20 list	0	524K
	0.30 list	1.20 list	—	524K

Which key answers this model

Your request → your own keys first (none added yet). The provider bills you; AnyRouter adds $0.

If none of your keys can serve it → the shared pool: keys other people donated. You pay the list price from AnyRouter credits. A donor whose key stays valid pays nothing here.

Pool for this model: not covered yet.