How much does Solar Pro 4 cost per million tokens?

Solar Pro 4 costs $0.09 per million input tokens and $0.36 per million output tokens at list price, and $0.018 per million cached input tokens.

What is the context window of Solar Pro 4?

Solar Pro 4 accepts up to 524,288 tokens of context and returns up to 131,072 output tokens.

How much do 1,000 chat messages cost with Solar Pro 4?

About $0.27, assuming 1,000 input + 500 output tokens per message.

Is there a cheaper alternative to Solar Pro 4?

In the same price range, DeepSeek DeepSeek V4.1 Flash ($0.03 / $0.5), Qwen Qwen3.7 Flash ($0.03 / $0.13), DeepSeek DeepSeek V4 Flash 0423 ($0.042 / $0.084) cost less per token. Quality differs: test on your own prompts.

Where can I buy Upstage API credits for less?

Discount credit books resell OpenRouter usage below face value within their depth, OpenRouter adds a 5.5% card fee, and Upstage sells its own credits at face value. The live table on this page ranks them for $100 of usage.

Upstage · live price

Solar Pro 4 API pricing

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...

Small and cheap (under $1 per 1M)Tool callingReasoning

Input: $0.09; per 1M tokens
Output: $0.36; per 1M tokens
Cached input: $0.018; per 1M tokens
Context: 524K; 131K max output

List price from OpenRouter, which passes Upstage's price through without markup. Refreshed hourly. Released August 10, 2026. Model id upstage/solar-pro4.

What Solar Pro 4 costs in practice

At list price, before any batch or caching discount.

1,000 chat messages

$0.27

1,000 input + 500 output tokens each

1,000 RAG questions

$0.90

8,000 input + 500 output tokens each

100 coding-agent steps

$0.34

30,000 input + 2,000 output tokens each, no caching

Solar Pro 4 price history

No price change since we started tracking on 2026-10-01. We record prices daily; changes will show here.

Solar Pro 4 price by host

One host serves this model through OpenRouter.

Upstage$0.09 in · $0.36 out · 524K ctx · 95.6% uptime 24h

Where to buy Upstage credits for less

Solar Pro 4 costs the same per token everywhere it's sold through OpenRouter. What changes is the price of the credits. Live quotes for $100 of usage:

#	Where you buy	You payYou pay for $100.00 of usage	vs list price	Price source
1	OrbioCardCheapest right now Credits from a discount book, plus a 5% platform fee and card processing, both included in the quote.	$85.10 incl. $2.60 card processing	-14.9%	live quote
2	smaaartCard Credits from a discount book, plus a 5% platform fee on face value. Card processing and taxes shown at checkout.	$95.00 + card processing and tax at checkout (not in this number)	-5.0%	live quote
3	Direct from the labCard Prepaid credits at face value (OpenAI, Anthropic, Google…). Taxes may apply.	$100.00 no top-up fee	list price	face value
4	OpenRouterCrypto 5% on crypto purchases. No markup on model prices.	$105.00 fees included	+5.0%	published fee
5	OpenRouterCard 5.5% on card purchases, $0.80 minimum. No markup on model prices.	$105.50 fees included	+5.5%	published fee

Disclosure: this site is run by the team behind smaaart, one of the options compared. Tables are ranked by price only, from live quotes and published fees, including when smaaart isn't first. How we compare

Solar Pro 4 cost calculator

Enter your monthly tokens to price your own usage.

Model$0.09 in / $0.36 out per 1M tokens · list price, liveInput tokens / month (millions)Output tokens / month (millions)

Usage at list price$8.10/ month(quotes below are for $8.00: purchases run from $5.00 to $10,000.00)

Cheaper alternatives to Solar Pro 4

Other labs' models in the same price range or the one below, cheaper per token.

Model	Input / 1M	Output / 1M	Blended 3:1	Context
DeepSeek: DeepSeek V4.1 Flash	$0.03	$0.5	$0.147	1.0M
Qwen: Qwen3.7 Flash	$0.03	$0.13	$0.055	1M
DeepSeek: DeepSeek V4 Flash 0423	$0.042	$0.084	$0.052	1.0M
Google: Gemma 4 26B A4B	$0.09	$0.3	$0.143	262K
Google: Gemma 4 31B	$0.09	$0.34	$0.152	262K
Qwen: Qwen3.5-9B	$0.1	$0.15	$0.112	262K

Other Upstage models

Model	Input / 1M	Output / 1M	Blended 3:1	Context
Solar Mini 4	$0.05	$0.2	$0.087	524K
Solar Pro 3	$0.15	$0.6	$0.262	131K

All Upstage API prices