Solar Pro 4

Upstage · upstage/solar-pro4

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...

Solar Pro 4 ranks #59 of 348 models in the default AI Benchmark Hub order (quality first, then cost). At $0.07 blended per million tokens, it is cheaper than 94% of models with published API pricing. Its 524,288-token context window is 2.0× the catalog median (262,144 tokens).

texttext->text

vs Claude Opus 5 vs Claude Fable 5 vs Qwen3.8 27B Test in arena Open on OpenRouter

Context

Max context: 524288
Max output: 131072

Pricing

Input / 1M: 0.03
Output / 1M: 0.12
Blend / 1M: 0.07

Quality

Quality index: —

Provider

Provider: Upstage
Moderated: no

Monthly cost at this blended rate

Estimated API spend if every token is billed at $0.07per million (the blend of this model's input and output prices). Real bills depend on the input/output mix.

Tokens / month	Est. cost (USD)
1,000,000	$0.07
10,000,000	$0.75
100,000,000	$7.50

Related models

Same lab, similar price, or similar quality — useful next comparisons.

Closest API price

Gemma 3 4B
$0.07 / 1M
DeepSeek V4 Flash Latest
$0.07 / 1M
Qwen3.7 Flash
$0.08 / 1M
gpt-oss-20b
$0.08 / 1M
Mistral Small 3
$0.07 / 1M