Solar Pro 3 by Upstage — Pricing, Benchmarks &amp; Real Outputs

Alternatives to Solar Pro 3

Solar Pro 3 is good. We've said that. We stand by it. But we'd be doing you a disservice if we didn't show you these.

Updated Feb 16, 2026

Share

Best for:Frontend Development Dashboard Design Animation Creative Coding UI Replication Nostalgia

Loading...

Compare Solar Pro 3

Alternatives to Solar Pro 3

Solar Pro 3 is good. We've said that. We stand by it. But we'd be doing you a disservice if we didn't show you these.

Updated Feb 16, 2026

Share

Best for:Frontend Development Dashboard Design Animation Creative Coding UI Replication Nostalgia

Solar Pro 3

Name: Solar Pro 3
Brand: upstage
Availability: OnlineOnly

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 for Korean with English and Japanese support. Note: Deprecating March 2, 2026.

Provider

Upstage

Release Date

2026-01-27

Size

LARGE

Pricing

In: $0.00/1M

Out: $0.00/1M

API Access

Use Solar Pro 3 in your applications via the OpenRouter API. Copy the code below to get started.

import requests

response = requests.post(
"https://openrouter.ai/api/v1/chat/completions"    ,
    headers={
"Authorization""Bearer $OPENROUTER_API_KEY"        : ,
"Content-Type""application/json"        : 
    },
    json={
"model""upstage/solar-pro-3:free"        : ,
"messages""role""user""content""Hello!"        : [{: , : }]
    }
)
print(response.json())

Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys

Writing DNA

Stylometric Fingerprint

Based on 18 text responses

Tick = global average

Vocabulary Diversity50%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length20.8 words

Average words per sentence.

Hedging0.42

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting6.5

**Bold** markers per 1,000 characters.

List Usage2.2

Bullet and numbered list items per 1,000 characters.

Section Structure0.56

Markdown headings per 1,000 characters.

Emoji Usage0.17

Emoji per 1,000 characters.

Transitions0.12

"However", "moreover", "furthermore" per 100 words.

Opening Habits

Consistency

79%

Across 18 responses

Model Insights

Sponsored

Model Responses

34 outputs from Solar Pro 3

Sponsored

Keep exploring

Solar Pro 3 vs MiniMax M2.5

Real outputs compared side by side

Best AI for Technical Analysis

Compare AI models on deep technical reasoning. Ranked across FLOP estimation,...

Loading...

Compare Solar Pro 3

Alternatives to Solar Pro 3

Solar Pro 3 is good. We've said that. We stand by it. But we'd be doing you a disservice if we didn't show you these.

Updated Feb 16, 2026

Share

Best for:Frontend Development Dashboard Design Animation Creative Coding UI Replication Nostalgia

Solar Pro 3

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 for Korean with English and Japanese support. Note: Deprecating March 2, 2026.

Provider

Upstage

Release Date

2026-01-27

Size

LARGE

Pricing

In: $0.00/1M

Out: $0.00/1M

API Access

Use Solar Pro 3 in your applications via the OpenRouter API. Copy the code below to get started.

import requests

response = requests.post(
"https://openrouter.ai/api/v1/chat/completions"    ,
    headers={
"Authorization""Bearer $OPENROUTER_API_KEY"        : ,
"Content-Type""application/json"        : 
    },
    json={
"model""upstage/solar-pro-3:free"        : ,
"messages""role""user""content""Hello!"        : [{: , : }]
    }
)
print(response.json())

Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys

Writing DNA

Stylometric Fingerprint

Based on 18 text responses

Tick = global average

Vocabulary Diversity50%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length20.8 words

Average words per sentence.

Hedging0.42

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting6.5

**Bold** markers per 1,000 characters.

List Usage2.2

Bullet and numbered list items per 1,000 characters.

Section Structure0.56

Markdown headings per 1,000 characters.

Emoji Usage0.17

Emoji per 1,000 characters.

Transitions0.12

"However", "moreover", "furthermore" per 100 words.

Opening Habits

Consistency

79%

Across 18 responses

Model Insights

Sponsored

Model Responses

34 outputs from Solar Pro 3

Sponsored

Keep exploring

Solar Pro 3 vs MiniMax M2.5

Real outputs compared side by side

Best AI for Technical Analysis

Compare AI models on deep technical reasoning. Ranked across FLOP estimation,...

Loading...

Compare Solar Pro 3

Alternatives to Solar Pro 3

Solar Pro 3 is good. We've said that. We stand by it. But we'd be doing you a disservice if we didn't show you these.

MiMo-V2.5xiaomi

Kimi K2.6moonshotai

Solar Pro 3

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 for Korean with English and Japanese support. Note: Deprecating March 2, 2026.

Provider

Upstage

Release Date

2026-01-27

Size

LARGE

Pricing

In: $0.00/1M

Out: $0.00/1M

API Access

Use Solar Pro 3 in your applications via the OpenRouter API. Copy the code below to get started.

import requests

response = requests.post(
"https://openrouter.ai/api/v1/chat/completions"    ,
    headers={
"Authorization""Bearer $OPENROUTER_API_KEY"        : ,
"Content-Type""application/json"        : 
    },
    json={
"model""upstage/solar-pro-3:free"        : ,
"messages""role""user""content""Hello!"        : [{: , : }]
    }
)
print(response.json())

Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys

Writing DNA

Stylometric Fingerprint

Based on 18 text responses

Tick = global average

Vocabulary Diversity50%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length20.8 words

Average words per sentence.

Hedging0.42

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting6.5

**Bold** markers per 1,000 characters.

List Usage2.2

Bullet and numbered list items per 1,000 characters.

Section Structure0.56

Markdown headings per 1,000 characters.

Emoji Usage0.17

Emoji per 1,000 characters.

Transitions0.12

"However", "moreover", "furthermore" per 100 words.

Opening Habits

Consistency

79%

Across 18 responses

Model Insights

Sponsored

Model Responses

34 outputs from Solar Pro 3

Sponsored

Keep exploring

Solar Pro 3 vs MiniMax M2.5

Real outputs compared side by side

Best AI for Technical Analysis

Compare AI models on deep technical reasoning. Ranked across FLOP estimation,...

Solar Pro 3

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 for Korean with English and Japanese support. Note: Deprecating March 2, 2026.

Provider

Upstage

Release Date

2026-01-27

Size

LARGE

Pricing

In: $0.00/1M

Out: $0.00/1M

API Access

Use Solar Pro 3 in your applications via the OpenRouter API. Copy the code below to get started.

import requests

response = requests.post(
"https://openrouter.ai/api/v1/chat/completions"    ,
    headers={
"Authorization""Bearer $OPENROUTER_API_KEY"        : ,
"Content-Type""application/json"        : 
    },
    json={
"model""upstage/solar-pro-3:free"        : ,
"messages""role""user""content""Hello!"        : [{: , : }]
    }
)
print(response.json())

Replace $OPENROUTER_API_KEY with your API key from openrouter.ai/keys

Writing DNA

Stylometric Fingerprint

Based on 18 text responses

Tick = global average

Vocabulary Diversity50%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length20.8 words

Average words per sentence.

Hedging0.42

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting6.5

**Bold** markers per 1,000 characters.

List Usage2.2

Bullet and numbered list items per 1,000 characters.

Section Structure0.56

Markdown headings per 1,000 characters.

Emoji Usage0.17

Emoji per 1,000 characters.

Transitions0.12

"However", "moreover", "furthermore" per 100 words.

Opening Habits

Consistency

79%

Across 18 responses

Model Insights

Sponsored

Model Responses

34 outputs from Solar Pro 3

Sponsored

Keep exploring

Solar Pro 3 vs MiniMax M2.5

Real outputs compared side by side