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Model registry / Upstage / Solar Pro / solar-pro3

solar-pro3

Flagship model for demanding analysis, coding, and production agent workflows

Line

Solar Pro

Weights

API only

Released

2026-01

Context

131K

Input

$0.15 / 1M

Output

$0.25 / 1M

Max output

8K

Coverage

not covered yet

Overview

Solar Pro 3 is the flagship model in the solar-pro line, designed for demanding analysis, coding, and production agent workflows. It is the first version of its line in the registry. It has a context window of 131072 tokens and a maximum output of 8192 tokens. Pricing starts at $0.15 per million input tokens and $0.25 per million output tokens. The weights are not open. It supports reasoning mode, tool calling, and accepts and returns text.

Specs

Released2026-01
LineUpstage · Solar Pro
WeightsAPI only
Context131K tokens
Max output8K tokens
Inputtext
Outputtext
ReasoningYes
Tool callingYes
Knowledge cutoff2025-03
API idsolar-pro3

Pricing

Input$0.15 / 1M tokens
Cached inputnot stated
Output$0.25 / 1M tokens

First version of its line in the registry.

Range across the hosts that serve it: up to $0.25 per 1M input tokens.

Strengths

  • 131072 token context window
  • 8192 token max output
  • Reasoning mode for complex tasks
  • Tool calling for agent workflows
  • Priced from $0.15 per million input tokens

Best for

  • Reach for it for demanding analysis tasks
  • Reach for it for coding workflows
  • Reach for it for production agent workflows

How to access

ProviderModel id
LLMTRsolar-pro3
Upstagesolar-pro3

2 hosts serve this model at the price above · the maker's documentation

Solar Pro: every version

VersionReleasedContextInput
Solar Pro 4Current2026-08-06524K$0.03
solar-pro32026-01131K$0.15

The registry keeps the six most recent versions of a line. Older ones stay in the file and can be surfaced without a rebuild.

FAQ

What is the context window size?
131072 tokens.
Does it support tool calling?
Yes, it supports tool calling and reasoning mode.
Are the weights open?
No, the weights are not open.
ProprietaryReasoning131K context