Upstage: Solar Pro 4
upstage/solar-pro4Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
Modalities
In / out per 1M$0.15 / $0.60
Context512K
ReleasedAug 10, 2026
Providers
2 providers serve this model upstream.
| Provider | Input /M | Output /M | Cache read /M | Latency P50 | Throughput P50 | Uptime |
|---|---|---|---|---|---|---|
| $0.15 | $0.60 | $0.03 | 2.04s | 58 tps | 100% | |
| $0.15 | $0.60 | $0.03 | 0.65s | 85 tps | 100% |
Market-wide measurements, refreshed every 15 minutes. They describe who serves Solar Pro 4 in general, not how ProjectCOZY routes your requests.
Pricing
List rates per 1M tokens — what Solar Pro 4 costs pay-as-you-go elsewhere, not what you pay here.
Input
$0.15
per 1M tokens
Output
$0.60
per 1M tokens
Cache read
$0.03
per 1M cached tokens
Included in every pass
Solar Pro 4 is included in every ProjectCOZY pass at no extra cost — one flat rate, no per-token metering. The rates above are there for comparison.
Performance
Time to first token and output speed across every provider, over the last 3 days.
0.0s1.0s2.0s3.0s4.0s
Oct 29, 12 AMOct 29, 8 AMOct 29, 4 PMOct 30, 12 AMOct 30, 8 AMOct 30, 4 PMOct 31, 12 AMOct 31, 8 AMOct 31, 4 PMNov 1, 12 AMNov 1, 8 AMNov 1, 4 PM
Upstage Upstage
0 tok/s50 tok/s100 tok/s150 tok/s200 tok/s
Oct 29, 12 AMOct 29, 8 AMOct 29, 4 PMOct 30, 12 AMOct 30, 8 AMOct 30, 4 PMOct 31, 12 AMOct 31, 8 AMOct 31, 4 PMNov 1, 12 AMNov 1, 8 AMNov 1, 4 PM
Upstage Upstage
Uptime
100% of requests were served successfully over the last 3 days, across all providers.
Last 3 daysAvailability 99.81%
Oct 29, 6:00 PMNow
Availability over the last 24 hoursAvailability 99.83%
100% 98% 97% 95%
Oct 31, 6:10 PMNow
Apps
Tools that most often run Solar Pro 4, by tokens this week.
Activity
2585.5B tokens processed market-wide in the last month.
050.0B100.0B150.0B200.0B
Oct 2Oct 7Oct 12Oct 17Oct 22Oct 27Nov 1
Tokens
FAQ
Which model id do I use for Solar Pro 4?
upstage/solar-pro4. Send it as the model field from any OpenAI-compatible client, against https://minuykh.app/v1.
How much context does Solar Pro 4 hold?
524,288 tokens per request, of which up to 131,072 can be the response.
What can it accept and return?
Input: text. Output: text.
What does Solar Pro 4 cost on a pass?
Nothing beyond the pass itself. Pay-as-you-go elsewhere it lists at $0.15 per 1M input tokens and $0.60 per 1M output tokens.
Who built Solar Pro 4?
Upstage, in the Solar family.
Explore
Other models your pass can call.
