Upstage

Solar Pro 3

upstage/solar-pro-3
Released Jan 27, 2026Commercial
ThinkingToolscommercial cloud

Solar Pro 3 is Upstage's powerful Mixture-of-Experts (MoE) language model. With 102B total parameters and 12B active parameters per forward pass, it delivers exceptional performance while maintaining computational efficiency. Optimized...

Cost / 1M tokens

Low usage

$0.15

input

$0.015

cached input

$0.60

output

Context Window

131K

Up to 118K max output

Modalities

text → text

Other tokenizer

Quickstart & API

upstage/solar-pro-3
Open the model picker in ChatOSS Desktop (Code, Kanban, or Chat) and select or paste this model ID.

Best for & Strengths

Key Strengths

Extended reasoningTool & agent calling

Recommended Workloads in ChatOSS

  • Coding agents
  • Complex reasoning & debugging
Available in ChatOSS Code, Kanban Orchestrate, and Chat modes via Plus, Max, or BYOK.

Verified Evaluations

Benchmarks & Frontier Comparison

How Solar Pro 3 compares against leading open-weight and proprietary frontier models across independent agentic coding and reasoning suites.

View full Top 40 Leaderboard →
Benchmark (Metric)Solar Pro 3DeepSeek V4.1 FlashGLM 5.3Kimi K3.1 ProClaude Opus 5.5
Agentic & Software Engineering
ChatOSS Agentic Coding Index (%)—63.2%58.3%65%74.1%
SWE-Bench Verified (%)—91.5%95.4%94.8%97%
DeepSWE v1.1 (Pass@1 %)—77%69%73.5%74.2%
Vibe Code Bench v1.1 (%)—87.7%78.1%88.4%90.3%
Terminal-Bench 4.0 (%)—42.3%42%46.2%65.2%
Code Migration (%)—45.6%44.2%52%66.7%
Intelligence & Token Economics
Artificial Analysis Intelligence Index (0–100)7.839.544.855.157.6
Input Price (/ 1M tokens)$0.15$0.15$1.40$2.00$4.00
Output Price (/ 1M tokens)$0.60$0.60$4.40$10.00$20.00

Artificial Analysis Intelligence Index

Artificial Analysis

7.8

Active Provider Endpoints (1)

Upstream inference providers serving Solar Pro 3, with per-provider pricing, context limits, quantization, and 24-hour uptime.

ProviderInput / 1MOutput / 1MCache Read / 1MContextMax OutputQuantizationUptime (24h)
Upstagecache
upstage
$0.15$0.60$0.015131K118K—100.0%

Supported API Parameters

Parameters accepted by this model when called through ChatOSS or OpenRouter.

frequency_penaltyinclude_reasoningmax_tokensparallel_tool_callspresence_penaltyreasoningreasoning_effortresponse_formatstructured_outputstemperaturetool_choicetoolstop_p

Compare Similar Models

Browse all models →

Upstage

Solar Mini 4

524K

Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic use cases where response...

$0.05 / $0.20Intel 24.1

Upstage

Solar Pro 4

524K

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...

$0.15 / $0.60Intel 28.2

Anthropic

Claude Opus 5.5

1M

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

$4.00 / $20.00Coding 74.1%

Moonshot AI

Kimi K3.1 Pro

1M

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window. It is built for long-horizon coding, 3D...

$2.00 / $10.00Coding 65%

Anthropic

Claude Opus 5

1M

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...

$5.00 / $25.00Coding 68.3%

Anthropic

Claude Fable 5.1

1M

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

$10.00 / $50.00Coding 67.6%