When was Solar Pro 4 released?

Solar Pro 4 was released on August 6, 2026 by upstage. This is the official Solar Pro 4 release date tracked on LLM Stats.

How much does Solar Pro 4 cost?

Solar Pro 4 pricing starts at $0.30 per million input tokens, $0.06 per million cached input tokens, $1.20 per million output tokens via Upstage, the lowest price among tracked providers.

Is Solar Pro 4 available via API?

Yes, Solar Pro 4 is available via API. See the official documentation for authentication and endpoint details. It is served by 1 provider tracked on LLM Stats.

Who created Solar Pro 4?

Solar Pro 4 was created by upstage.

What is the license for Solar Pro 4?

Solar Pro 4 is released under the Proprietary license.

Where can I use Solar Pro 4?

Solar Pro 4 is available through 1 provider including Upstage.

Where is the Solar Pro 4 paper or technical report?

Solar Pro 4 has a paper or technical report available at https://www.upstage.ai/blog/en/solar-pro-4. Use that source for architecture, training, release and evaluation details.

What models should I compare Solar Pro 4 against?

Common Solar Pro 4 comparisons include Solar Pro 4 vs Seed 2.0 Pro, Solar Pro 4 vs Grok-4 Heavy, Solar Pro 4 vs Nova 2 Pro. Compare them side by side for benchmark scores, pricing, context window, latency and API availability.

Solar Pro 4 API Pricing, Context Window & Benchmarks

Name: Solar Pro 4
Author: upstage

Solar Pro 4: API Pricing, Context Window & Benchmarks

Solar Pro 4 is a language model from Unknown Organization, released in August 2026, with a 524K-token context window, and pricing from $0.300/M input, $0.060/M cached input, $1.20/M output.

Solar Pro 4 is Upstage's proprietary reasoning-focused agentic LLM (text→text) for finishing multi-step commercial work: long documents, terminal tasks, and multi-turn tool use. Supports English, Korean, and Japanese with a ~512K context

Input

Text

Output

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Solar Pro 4 benchmarks

Capability tiers

Standing within each category, adjusted for leaderboard depth.

Real tasks performance

High-confidence performance for Solar Pro 4 across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.

Performance by conversation depth

How Solar Pro 4 holds up as conversations get longer.

Quality Tracker

Solar Pro 4 Performance Across Datasets

Scores sourced from the model's scorecard, paper, or official blog posts

llm-stats.com - Mon Sep 07 2026

Notice missing or incorrect data?

Solar Pro 4 pricing

Providers

Solar Pro 4 starts at $0.300 per million input tokens and $1.20 per million output tokens via Upstage. Reused prompt prefixes cost $0.0600 per million cached input tokens.

Provider	Input $/M	Cached input $/M	Output $/M	Context in / out	TTFT p95 s	Output p5 c/s	Modalities in / out
Upstage	$0.300	$0.0600	$1.20	524.3K/131.1K	—	—	/

Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.

Solar Pro 4 context window

Input and output token limits for Solar Pro 4, plus how it ranks on long-context understanding.

InputOutput

524Ktokens

131Ktokens

≈ 788 pages of text

524K

8K128K1M

Solar Pro 4 API

Available from the model provider

Solar Pro 4 is available from Upstage. It is not currently routed through the LLM Stats gateway.

Read the official API documentation

Solar Pro 4 latency

Solar Pro 4 time to first token, sustained output throughput, and failed-request rate from live API traffic over the trailing 7 days.

Solar Pro 4 examples

Recent arena outputs from Solar Pro 4, picked from the highest-ranked matchups.

Solar Pro 4 license

Solar Pro 4 is a proprietary model available under its provider's product and API terms.

License: Proprietary; Hosted access

Proprietary license - usage restrictions apply

Solar Pro 4 resources

Official sources for Solar Pro 4: api documentation, official launch post.

Solar Pro 4 vs other models

The most-compared alternatives to Solar Pro 4 are Seed 2.0 Pro, Grok-4 Heavy, Nova 2 Pro. Open any pair side-by-side for benchmarks, pricing, context, and latency.