Solar Pro 4 Free API on Cline

Free API Verified

Available from Cline

Catalog metadata matched Reasoning models.dev metadata

Upstage's flagship model, specialized for agentic use

Free APICline nativeReasoningTool callingJSON modeText

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API Details

Copy-ready connection details

Use these values in your client or SDK.

Base URL

See provider docs

Model ID

cline-free/solar-pro4

API format Cline native

Technical Details

Solar Pro 4 specifications

Provider and model catalog

Context window 524K

Max output 131K

Status Online

Family solar-pro

Knowledge cutoff 2026-02

Released Aug 6, 2026

Last updated Sep 9, 2026

Free listing since Sep 9, 2026

Input text

Output text

Capabilities reasoning, tool calling, structured output, temperature control

AI Recommendation

Should you use Solar Pro 4?

Solar Pro 4 is listed for chat workloads and supports a 524K context window.

Use it when Cline's free tier is enough for evaluation, demos, or light production traffic.

Best for

Chat

Strengths & Weaknesses

Strengths

Long context window
Reasoning mode listed
Tool calling support
Structured JSON output

Watch outs

Free-tier rate limits apply
Vision support is not listed

Availability

Solar Pro 4 availability by provider

Current provider only

We only found this Solar Pro 4 listing on Cline in the current catalog. Use the related models section for nearby alternatives.

Provider	Model listing	Access	Context	API	Limits
Cline	Solar Pro 4	Free tier	0	Native	See provider page

View Cline setup guide →

Compare

Solar Pro 4 alternatives to consider

Open comparison

Model	Provider	Access
deepseek-v4-flash	Cline	Free tier
laguna-s-2.1:free	Cline	Free tier
glm-5.3-flash	Cline	Free tier
LongCat-2.0	Cline	Free tier
Muse Spark 1.3 Contributor	Cline	Free tier

Typical Use Cases

Solar Pro 4 use cases

Chat

Solar Pro 4 is tagged for chat in this catalog.

FAQ

Solar Pro 4 free API FAQ

Is Solar Pro 4 free to use?

Solar Pro 4 is listed with free API access on Cline, subject to the provider's quota and account policy.

What is the Solar Pro 4 model ID?

The model ID shown in this catalog is cline-free/solar-pro4.

What context window does Solar Pro 4 support?

The listed context window is 524K tokens with up to 131K output tokens.

More about Solar Pro 4

Solar Pro 4 is a free model available from Cline.

For API keys, setup steps, and provider-level limits, see the Cline provider page.