Solar Pro 4 model profile
Evidence snapshot:
Solar Pro 4 is a Upstage model profile with a 524,288-token context window. The dated catalog snapshot records text modalities and interfaces for prompt caching, reasoning controls, structured output, text generation, tool calling.
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 work, and coding.
Solar Pro 4 is a reference profile: Upstage publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call.
Solar Pro 4 is an independent knowledge profile. It does not claim that Kendr hosts the model, quote a Kendr customer price, promise API availability, or advertise a Kendr routing receipt.
Solar Pro 4 accepts text and returns text. The snapshot records prompt caching, reasoning controls, structured output, text generation, and tool calling as capabilities or interfaces.
The dated reference snapshot lists $0.03 input and $0.12 output per million tokens. Cached input is $0.006 per million tokens.
The 2026-09-06 snapshot includes 1 Artificial Analysis index and 6 Design Arena categories. Publisher-reported launch results are labeled and are not presented as Kendr measurements; scores from different suites are not treated as interchangeable.
Solar Pro 4 ranked #20 in the cited trailing-7-day third-party catalog usage dataset as of 2026-09-06. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share.
Profile data was reviewed for the 2026-09-06 snapshot. Claims retain their source dates, and unavailable fields are shown as unavailable instead of estimated.
Profile facts
- Profile type
- Model research profile
- Provider or publisher
- Upstage
- Context window
- 524,288 tokens
- Snapshot date
- 2026-09-06
- Knowledge cutoff
- Not disclosed
- Reference catalog ID
- upstage/solar-pro4
When to pick Solar Pro 4
Solar Pro 4 is a reference profile: Upstage publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call.
Each condition below is derived from this model's own values in the 2026-09-06 snapshot, compared only against models publishing the same field.
- Reach for it when cost is the binding constraint. At $0.03 in and $0.12 out per 1M tokens, combined token price sits in the cheapest quarter of the 146 models publishing both rates in this snapshot.
- Reach for it when the model has to call tools. Tool calling is recorded in the snapshot, so this route can drive an agent loop rather than only answer in prose.
- Look elsewhere when you need to call it through Kendr today. This is a research reference profile with no Kendr alias. The facts and evidence here are published for comparison; the model is not routable on Kendr.
Context, modalities, and identity
Solar Pro 4 accepts text and returns text. The snapshot records prompt caching, reasoning controls, structured output, text generation, and tool calling as capabilities or interfaces.
- Provider or publisher
- Upstage
- Context window
- 524,288 tokens
- Maximum output
- 131,072 tokens
- Input modalities
- text
- Output modalities
- text
- Knowledge cutoff
- Not disclosed
Model overview
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 work, and coding.
- Reference model ID
- upstage/solar-pro4
- Canonical version
- upstage/solar-pro4-20260810
- Hugging Face ID
- Not separately documented
Capabilities and supported controls
Capabilities and parameters are reported from the dated catalog and source records; their presence does not guarantee identical behavior across every provider route.
- Supported parameters
- frequency_penalty, include_reasoning, max_tokens, parallel_tool_calls, presence_penalty, reasoning, response_format, structured_outputs, temperature, tool_choice, tools, top_p
- prompt caching
- reasoning controls
- structured output
- text generation
- tool calling
Dated pricing snapshot
The dated reference snapshot lists $0.03 input and $0.12 output per million tokens. Cached input is $0.006 per million tokens.
These are dated third-party reference prices, not Kendr prices or an availability offer. Routes, tiers, caching, region, and provider policy can change the landed price.
- Price date
- 2026-09-06
- Input
- $0.03 per 1M tokens
- Cached input
- $0.006 per 1M tokens
- Output
- $0.12 per 1M tokens
Provider routes, performance, and uptime
The snapshot retains 2 provider endpoints. Provider prices, context limits, p50 performance, and uptime can differ by route and are not Kendr guarantees.
- Active provider endpoints
- 2
- Best p50 latency
- 1.80 s
- Best p50 throughput
- 34 tok/s
- Availability with routing
- 99.99% over the sampled window
- Availability without routing
- 99.57% over the sampled window
- Performance date
- 2026-09-06
| Provider | Quantization | Input / 1M | Output / 1M | Cache read / 1M | Context | p50 latency | p50 throughput | Uptime (1d) |
|---|---|---|---|---|---|---|---|---|
| Upstage (ZDR) | unknown | $0.03 / 1M | $0.12 / 1M | $0.006 / 1M | 524,288 tokens | 3.57 s | 28 tok/s | 99.66% |
| Upstage | unknown | $0.03 / 1M | $0.12 / 1M | $0.006 / 1M | 524,288 tokens | 1.80 s | 34 tok/s | 99.74% |
Benchmark evidence and limitations
The 2026-09-06 snapshot includes 1 Artificial Analysis index and 6 Design Arena categories. Publisher-reported launch results are labeled and are not presented as Kendr measurements; scores from different suites are not treated as interchangeable.
Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source.
- Coding Index
- 52.7
| Design Arena category | Elo | Win rate | Rank |
|---|---|---|---|
| 3d | 1180 | 41.3% | #54 |
| codecategories | 1170 | 36% | #67 |
| dataviz | 1095 | 27.3% | #91 |
| gamedev | 1143 | 31.6% | #72 |
| uicomponent | 1177 | 36.4% | #62 |
| website | 1175 | 36.6% | #71 |
Popularity and market context
Solar Pro 4 ranked #20 in the cited trailing-7-day third-party catalog usage dataset as of 2026-09-06. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share.
- Third-party catalog rank
- #20
- Global market share
- Not inferred
- Observation date
- 2026-09-06
Frequently asked questions
When should I use Solar Pro 4?
Solar Pro 4 is a reference profile: Upstage publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call. Reach for it when cost is the binding constraint: At $0.03 in and $0.12 out per 1M tokens, combined token price sits in the cheapest quarter of the 146 models publishing both rates in this snapshot. Reach for it when the model has to call tools: Tool calling is recorded in the snapshot, so this route can drive an agent loop rather than only answer in prose. Look elsewhere when you need to call it through Kendr today: This is a research reference profile with no Kendr alias. The facts and evidence here are published for comparison; the model is not routable on Kendr.
What is Solar Pro 4?
Solar Pro 4 is a Upstage model profile with a 524,288-token context window. The dated catalog snapshot records text modalities and interfaces for prompt caching, reasoning controls, structured output, text generation, tool calling.
What context window does Solar Pro 4 have?
The dated profile lists 524,288 tokens of context and up to 131,072 output tokens. Provider routes, variants, and runtime configuration can impose lower effective limits.
What benchmark evidence is available for Solar Pro 4?
The 2026-09-06 snapshot includes 1 Artificial Analysis index and 6 Design Arena categories. Publisher-reported launch results are labeled and are not presented as Kendr measurements; scores from different suites are not treated as interchangeable. Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source.
Is Solar Pro 4 available through Kendr?
This is an independent knowledge profile, not a Kendr-hosted availability claim. Check Kendr's live public model API for currently enabled Kendr aliases.
Does the popularity rank represent Solar Pro 4's global market share?
Solar Pro 4 ranked #20 in the cited trailing-7-day third-party catalog usage dataset as of 2026-09-06. Observed within the cited trailing-7-day third-party catalog usage dataset; this is not global AI market share. No global market-share percentage is inferred when the source does not publish one.
Sources and evidence dates
- Solar Pro 4 third-party catalog record (catalog, checked 2026-09-06)
- Third-party model catalog methodology (methodology, checked 2026-09-06)
- Artificial Analysis capability indices methodology (benchmark, checked 2026-09-06)
- Design Arena leaderboard and methodology (benchmark, checked 2026-09-06)