The Orchestrator › Models › Upstage
Upstage: Solar Pro 4
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive...
Specifications
| Provider | Upstage |
| Model ID | upstage/solar-pro4 |
| Context window | 524K tokens (524,288) |
| Modalities | text → text |
| Tokenizer | Other |
| Router sources | OpenRouter, TrustedRouter |
| Released | 2026-08-10 |
| Tracked since | 2026-11-14 |
| Popularity | Not in the ranked set |
| Reasoning | Supported |
Pricing (per million tokens)
| Variant | Source | API ID | Input | Output | Context |
|---|---|---|---|---|---|
| standard | OpenRouter | upstage/solar-pro4 | $0.15 | $0.6 | 524K |
| standard | TrustedRouter | upstage/solar-pro4 | $0.158 | $0.633 | — |
Recorded price history
| Date | Input / 1M | Output / 1M | Context |
|---|---|---|---|
| 2026-11-14 | $0.158 | $0.633 | — |
| 2026-11-14 | $0.15 | $0.6 | 524K |
Capabilities
Agentic tool useStructured outputs256K+ context windowControllable reasoningNo content storage (attested)
Trust flags come from TrustedRouter's per-provider attestations.
Supported parameters
frequency_penalty, include_reasoning, logprobs, max_tokens, parallel_tool_calls, presence_penalty, reasoning, reasoning_effort, repetition_penalty, response_format, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p