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$0.09 / $0.36
Context512K
ReleasedAug 10, 2026
Providers
2 providers serve this model upstream.
| Provider | Input /M | Output /M | Cache read /M | Latency P50 | Throughput P50 | Uptime |
|---|---|---|---|---|---|---|
| $0.09 | $0.36 | $0.02 | 1.51s | 56 tps | 100% | |
| $0.09 | $0.36 | $0.02 | 0.69s | 65 tps | 99.97% |
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
$0.09
per 1M tokens
Output
$0.36
per 1M tokens
Cache read
$0.02
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.
0.0s2.5s5.0s7.5s10.0s
Oct 11, 12 AMOct 11, 8 AMOct 11, 4 PMOct 12, 12 AMOct 12, 8 AMOct 12, 4 PMOct 13, 12 AMOct 13, 8 AMOct 13, 4 PMOct 14, 12 AMOct 14, 8 AM
Upstage Upstage
0 tok/s50 tok/s100 tok/s150 tok/s200 tok/s
Oct 11, 12 AMOct 11, 8 AMOct 11, 4 PMOct 12, 12 AMOct 12, 8 AMOct 12, 4 PMOct 13, 12 AMOct 13, 8 AMOct 13, 4 PMOct 14, 12 AMOct 14, 8 AM
Upstage Upstage
Uptime
100% of requests were served successfully over the last 3 days, across all providers.
Last 3 daysAvailability 99.71%
Oct 11, 2:00 PMNow
Availability over the last 24 hoursAvailability 99.91%
100% 98% 97% 95%
Oct 13, 2:40 PMNow
Apps
Tools that most often run Solar Pro 4, by tokens this week.
Activity
5132.2B tokens processed market-wide in the last month.
0100.0B200.0B300.0B400.0B
Sep 14Sep 19Sep 24Sep 29Oct 4Oct 9Oct 14
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 http://192.168.1.55/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 $0.09 per 1M input tokens and $0.36 per 1M output tokens.
Who built Solar Pro 4?
Upstage, in the Solar family.
Explore
Other models your pass can call.
