Best Upstage Reasoning Models

Quick answer · Updated June 2026

The best Upstage model for reasoning is Solar Pro 3 — 25.9 intelligence with extended step-by-step thinking.

25.9Intelligence

20 t/sSpeed

$0.150Input /M

128KContext

Large language models with extended reasoning / thinking, ranked by intelligence. The best models for complex multi-step reasoning, math and analysis.

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solar-pro-3
ReasoningToolsJSON25.9 intel · $0.150/M · 20 t/s
25.9
Intelligence

Frequently asked

What is the best Upstage model for reasoning?

The best Upstage model for reasoning is Solar Pro 3 — 25.9 intelligence with extended step-by-step thinking.

How many Upstage models are there?

modelgrep tracks 1 Upstage models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by Solar Pro 3. 1 of them qualify for this ranking.

More Upstage rankings

Upstage: Smartest LLMs Upstage: Best LLMs for Coding Upstage: Best LLMs for Design & Frontend Upstage: Fastest LLMs Upstage: Lowest-Latency LLMs Upstage: Cheapest LLMs Upstage: Best Free LLMs Upstage: Best Vision LLMs Upstage: Best LLMs for Agents Upstage: Best Open-Source LLMs Upstage: Longest-Context LLMs

All rankings

Small & Fast LLMs Smartest LLMs Best LLMs for Coding Best LLMs for Design & Frontend Fastest LLMs Lowest-Latency LLMs Cheapest LLMs Best Free LLMs Best Vision LLMs Best LLMs for Agents Best Open-Source LLMs Longest-Context LLMs