Solar Pro 4 API pricing
upstage · Budget price tier · released 2026-08. Prices in USD per 1 million tokens. Data snapshot: 2026-11-12.
Promotional rate. The price we quote is 50% off Upstage's standard $0.30 per 1M input tokens and $1.20 per 1M output tokens, and a promotion can end without notice.
A support ticket workload of 100K requests a month costs $52.50 on Solar Pro 4; the next cheaper model in the Budget price tier for this workload, Gemma 4 31B, does it for $50.00. The price we quote for Solar Pro 4 has changed 2 times since 2026-08-15, most recently by +66.7% on 2026-10-20; it is now the 83rd cheapest of 160 models in the Budget price tier. None of its 2 hosts undercuts the price we quote. It is rated a stable release but does not meet all four criteria of the FinOps Friendly badge.
- Input: $0.15 per 1M tokens
- Output: $0.60 per 1M tokens
- Batch API (in/out): Not published
- Prompt-cache read: $0.03 per 1M tokens
- Context window: 524K tokens
- Arena ELO: 1388 as of 2026-11-08
Market position
On blended price ($0.465 per 1M tokens at 30% input, 70% output) it is cheaper than 43% of models in the Budget price tier: 83rd cheapest of 160, tied with 8 others. Across every price tier it is cheaper than 70% of priced text models in the catalogue: 83rd cheapest of 303, tied with 8 others. Its Arena ELO of 1388 ranks 105th of the 160 models that carry one, tied with one other, above 34% of them. With an Arena score of 1388, Solar Pro 4 sits below OptimNow's lowest working quality threshold, Standard (Arena 1420+), so the quality-bar method would not shortlist it for any of the 8 use cases the table prices. Each threshold is a distance below the best ranked model, which scores 1530 on Arena scores as of 8 Nov 2026.
Licence, size and capabilities
No licence is recorded for Solar Pro 4, so this page does not say whether it can be self-hosted. Its parameter count is not published. Listed capabilities: Text, Reasoning, Agents. Filling its 524K context window once costs $0.0786 in input tokens at list price.
Pricing by host
A host is a company that runs the model and sells it by the token: the model maker, a cloud platform like Amazon Bedrock, Azure or Vertex, or an independent host. One model, several hosts, and often several prices. This model is sold by 2 different hosts. The price we quote elsewhere on this page is marked. We quote one host's rate so that models stay comparable; it is not a recommendation to buy there.
The price we quote is already the cheapest of the 2 hosts: Upstage at $0.15 input / $0.60 output per 1M tokens. The dearest, KT, charges 2.0x the cheapest.
| Host | Input $/1M | Output $/1M |
|---|---|---|
| Upstage (model maker, price we quote) | $0.15 | $0.60 |
| KT | $0.30 | $1.20 |
List prices as published on 2026-11-12, via OpenRouter. Negotiated rates, committed-use discounts and provisioned capacity are not shown. Upstage's listing is a promotional rate: 50% off its standard rate.
Monthly cost at 100K requests, by business use case
From the after-discounts figure (prompt caching on the cached input share, batch API for async workloads, only where upstage publishes those rates), which assumes you implement both, to the list price. One figure means no discount is published.
| Use case | Tokens (in/out) | Monthly (after discounts – list) |
|---|---|---|
| Support Ticket | 1,500 / 500 | $42 – $53 |
| Knowledge Q&A | 2,000 / 800 | $61 – $78 |
| Meeting Summary | 10,000 / 1,200 | $210 – $222 |
| Marketing Content | 2,500 / 1,800 | $140 – $146 |
| Coding Task | 3,000 / 2,000 | $147 – $165 |
| Invoice Processing | 1,500 / 600 | $53 – $59 |
| Call Summary | 2,000 / 700 | $70 – $72 |
| Agent Workflow | 6,000 / 3,000 | $220 – $270 |
Price history
Solar Pro 4 has been in our daily price archive since tracking began on 2026-08-15, when it listed at $0.03 input / $0.12 output per 1M tokens. The price we quote has changed 2 times since then. The latest change, on 2026-10-20, was +66.7% on the blended price (30% input, 70% output), to $0.15 input / $0.60 output. Net of all changes, the blended price is +400.0% against 2026-08-15.
| Date | Old price (in / out) | New price (in / out) | Blended change |
|---|---|---|---|
| 2026-10-20 | $0.09 / $0.36 | $0.15 / $0.60 | +66.7% |
| 2026-09-11 | $0.03 / $0.12 | $0.09 / $0.36 | +200.0% |
Alternatives to Solar Pro 4
2 of the 4 comparable models below cost less than Solar Pro 4: Qwen3 30B A3B Instruct 2507 undercuts it by 48%, for 4 Arena points less.
- Next cheaper model in the Budget price tier: LFM2.5-2.6B (liquid) at $0.455 blended, 2% less.
- Next more expensive: Saba (Mistral) at $0.48 blended, 3% more.
The nearest models in the Budget price tier on Arena ELO, each with its blended price and score difference against Solar Pro 4.
- GPT-6 Luna (OpenAI): $0.10 in / $0.50 out per 1M, Arena ELO 1388 (18% cheaper, same Arena ELO)
- Muse Glimmer 30B (meta): $0.30 in / $1.20 out per 1M, Arena ELO 1389 (100% more expensive, 1 ELO point higher)
- Qwen3 30B A3B Instruct 2507 (Alibaba): $0.10 in / $0.30 out per 1M, Arena ELO 1384 (48% cheaper, 4 ELO points lower)
- GLM 4.5 Air (Zhipu): $0.20 in / $1.10 out per 1M, Arena ELO 1384 (78% more expensive, 4 ELO points lower)
- Cheapest within 15 Arena points: Qwen3.5-Flash (Alibaba), 57% cheaper, 9 ELO points higher, out of 19 models in that band.
- Highest Arena ELO within 20% of this price: Hy3 (Tencent), 12% cheaper, 51 ELO points higher, out of 11 models in that price band.
Other models from Upstage
Upstage has 1 other model in the catalogue. Prices per 1M tokens, input then output.
- Solar Mini 4: $0.05 / $0.20
Common questions about Solar Pro 4 pricing
- How much does Solar Pro 4 cost?
- Solar Pro 4 costs $0.15 per 1M input tokens and $0.60 per 1M output tokens. That is the model maker's own rate (Upstage). Prices as listed on 2026-11-12.
- Which host is cheapest for Solar Pro 4?
- The price we quote is already the cheapest of the 2 hosts: Upstage at $0.15 input / $0.60 output per 1M tokens. The dearest, KT, charges 2.0x the cheapest. Host rates as listed on 2026-11-12.
- Does Solar Pro 4 offer batch or cached pricing?
- Yes, for prompt caching only. Cache reads cost $0.03 per 1M tokens, as listed on 2026-11-12. No batch pricing is published.
- What would Solar Pro 4 cost per month?
- With the Support Ticket profile (1,500 input and 500 output tokens per request), 100,000 requests a month cost about $53 on Solar Pro 4 at the list price quoted on 2026-11-12.
- Can Solar Pro 4 be self-hosted?
- No licence is recorded for Solar Pro 4, so this page does not say whether it can be self-hosted.
- Has the price of Solar Pro 4 changed?
- Solar Pro 4 has been in our daily price archive since tracking began on 2026-08-15, when it listed at $0.03 input / $0.12 output per 1M tokens. The price we quote has changed 2 times since then. The latest change, on 2026-10-20, was +66.7% on the blended price (30% input, 70% output), to $0.15 input / $0.60 output. Net of all changes, the blended price is +400.0% against 2026-08-15.
It publishes a prompt-cache rate, which is the discount most often left out of a budget: what prompt caching saves.
These are list prices. Your real cost also depends on caching and batching, negotiated discounts, marketplace agreements, and the contracts you already have. OptimNow audits exactly that.
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