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Solar Pro 4

Released Aug 11, 2026 see all recent releases

Decision reading
Solar Pro 4 is tracked, but not publicly ranked yet. The profile exposes 11 sourced benchmark rows and leaves unsupported fields blank until a published record exists.

Data as of September 10, 2026 · How the score is built

Strongest published evidence

Published rows are visible, but no category has enough eligible evidence for a comparative rank.

Validate before choosing

11 published rows leave some tracked benchmark slots empty.

Decision snapshot

Each value carries a field reference instead of floating alone. Markers compare this model with the current ranked and priced catalog; they are not absolute quality thresholds.

Capability

Unranked

field median 56.2

Not eligible for a public rank

Price

$0.30input / $1.20 output

input median $1

cached $0.060 · blended $0.75

Speed

68tok/s

field median 86.5 tok/s

First token 31.36 s

Context

512Ktokens

field median 256,000

Maximum output length is tracked separately

How much of this is verified

Coverage is split by category so a strong number never hides a thin evidence base. Verified means the row is tied to a published source; provisional rows remain visible but separate.

  1. Agentic4/4 verified
  2. Coding3/3 verified
  3. ReasoningNot measured
  4. Knowledge2/2 verified
  5. Math1/1 verified
  6. MultilingualNot measured
  7. MultimodalNot measured
  8. Inst. FollowingNot measured
Verified sourceProvisionalNot measured

Spec sheet

Each documented value carries its source. Missing fields stay visible as not sourced or not published, rather than disappearing from the page.

API model ID
solar-pro4Upstage Solar Pro 4 launch post
Maximum output
Not sourced yet
Knowledge cutoff
Not sourced yet
Input modalities
Not sourced yet
Output modalities
Not sourced yet
Parameters
Not disclosed by the provider
Availability
Available through the Upstage Console API as solar-pro4 with a 512K context window and 128K maximum output, text in and text out. Upstage ran a launch discount through September 10, 2026 and a 70% promotion through October 10, 2026.
Cloud regions
Not tracked yet
Lifecycle
Current
API capabilities
Tool calling, structured outputs, and batch support are not tracked yet
Prompt caching
Published at $0.060 per million cached input tokensUpstage Solar Pro 4 launch post
Self-host
Weights are not published
Rate limits
Not tracked yet

Category score record

Scores and ranks appear only where published evidence can be displayed. The table keeps the score, weight, cohort, and evidence state together.

Category scores, ranks, weighting, benchmark coverage, and evidence status
CategoryScore
AgenticRank Not rankedWeight 22%4 benchmarksVerified18.7
CodingRank Not rankedWeight 20%3 benchmarksVerified56.4
ReasoningWeight 17%0 benchmarksNot measuredNot measured
KnowledgeRank Not rankedWeight 12%2 benchmarksVerified82.2
MathRank Not rankedWeight 5%1 benchmarkVerified77.0
MultilingualWeight 7%0 benchmarksNot measuredNot measured
MultimodalWeight 12%0 benchmarksNot measuredNot measured
Inst. FollowingWeight 5%0 benchmarksNot measuredNot measured

Benchmark ledger

Coding opens by default. The marker compares each value with the best source-verified result in the catalog; provisional leaders do not set the reference. Expand the remaining categories for every published row.

Coding3 rows
Coding benchmark values, best verified comparison, weight, and source status
LiveCodeBenchLiveCodeBench: Holistic and Contamination Free Evaluation of Large Language Models for CodeScore87.8%Versus best verified row

Best verified: Qwen3.7 Max · 91.6%

Gap3.8 behindWeightWeighted 15%
SWE-bench VerifiedSoftware Engineering Benchmark VerifiedScore70.6%Versus best verified row

Best verified: Claude Opus 5 · 96%

Gap25.4 behindWeightWeighted 10%
Terminal-Bench 2.1Terminal-Bench 2.1 (provider run)Score57.0%Versus best verified row

Best verified: SWE-2 · 92.8%

Gap35.8 behindWeightDisplay only
Agentic4 rows
Agentic benchmark values, best verified comparison, weight, and source status
BrowseCompScore49.2%Versus best verified row

Best verified: GPT-5.6 Sol · 92.2%

Gap43 behindWeightWeighted 25%
Terminal-Bench 2.1Terminal-Bench 2.1 (provider run)Score57.0%Versus best verified row

Best verified: SWE-2 · 92.8%

Gap35.8 behindWeightDisplay only
MCP AtlasScore61.4%Versus best verified row

Best verified: Muse Spark 1.1 · 88.1%

Gap26.7 behindWeightDisplay only
APEX-AgentsScore18.7%Versus best verified row

Best verified: Grok 4.6 · 57.5%

Gap38.8 behindWeightDisplay only
Knowledge2 rows
Knowledge benchmark values, best verified comparison, weight, and source status
MMLU-ProMassive Multitask Language Understanding ProfessionalScore86.3%Versus best verified row

Best verified: Qwen3.7 Max · 89.6%

Gap3.3 behindWeightWeighted 20%
GPQA-DGPQA DiamondScore89.0%Versus best verified row

Best verified: GPT-6 Astra · 96.0%

Gap7 behindWeightDisplay only
Math1 row
Math benchmark values, best verified comparison, weight, and source status
AIME26AIME 2026Score95.3%Versus best verified row

Best verified: GLM-5.2 · 99.2%

Gap3.9 behindWeightWeighted 25%
Korean1 row
Korean benchmark values, best verified comparison, weight, and source status
KMMLU-ProScore79.2%Versus best verified row

Best verified: A.X K2 · 80.5%

Gap1.3 behindWeightDisplay only

Lineage

The sequence follows explicit supersedes links. A successor's displayed score stays at least 0.1 points above its predecessor; raw benchmark rows do not move. Scores and prices remain blank when the corresponding public row or first-party rate is unavailable.

  1. Release date not sourced

    Solar Pro 2

    Not publicly ranked · Price not listed

  2. Jan 26, 2026

    Solar Pro 3

    Not publicly ranked · $0.15 / $0.6

  3. Aug 11, 2026 · you are here

    Solar Pro 4

    Not publicly ranked · $0.3 / $1.2

Pro

How to read this profile

The visual layer above carries the decisions. These notes preserve the model, ranking, coverage, and family context behind the numbers.

We track Solar Pro 4, but the public leaderboard excludes this profile until enough non-generated benchmark coverage is available. Only published rows appear above.

Solar Pro 4 is a proprietary model with a 512K context window. It uses an explicit reasoning mode, which can improve complex problem solving while adding latency and token use.

Available through the Upstage Console API as solar-pro4 with a 512K context window and 128K maximum output, text in and text out. Upstage ran a launch discount through September 10, 2026 and a 70% promotion through October 10, 2026.

Solar Pro 4 sits in the Solar family with Solar Pro 2, Solar Pro 3. Its explicit predecessor is Solar Pro 3. 11 of 434 tracked benchmark slots currently have displayable evidence. Missing categories stay blank.

Radar

Solar Pro 4 release history

Full release history

Radar confirmed these at the source. Use Solar Pro 4 in your work? Explore Radar to follow supported changes and choose your alerts.

Frequently asked questions

How does Solar Pro 4 perform overall in AI benchmarks?

Solar Pro 4 has 11 source-displayable benchmark rows, but it does not qualify for a public overall rank. The available rows remain visible by category without being converted into a site-wide score. Missing evidence stays blank instead of being estimated from an earlier model.

Is Solar Pro 4 good for knowledge and understanding?

Solar Pro 4 has source-displayable benchmark coverage for knowledge and understanding, but the public category table does not assign it a rank there. The individual rows remain available for inspection. A missing category position means the evidence threshold was not met; it does not convert the model's unmeasured work into a zero.

Is Solar Pro 4 good for coding and programming?

Solar Pro 4 has source-displayable benchmark coverage for coding and programming, but the public category table does not assign it a rank there. The individual rows remain available for inspection. A missing category position means the evidence threshold was not met; it does not convert the model's unmeasured work into a zero.

Is Solar Pro 4 good for mathematics?

Solar Pro 4 has source-displayable benchmark coverage for mathematics, but the public category table does not assign it a rank there. The individual rows remain available for inspection. A missing category position means the evidence threshold was not met; it does not convert the model's unmeasured work into a zero.

Is Solar Pro 4 good for agentic tool use and computer tasks?

Solar Pro 4 has source-displayable benchmark coverage for agentic tool use and computer tasks, but the public category table does not assign it a rank there. The individual rows remain available for inspection. A missing category position means the evidence threshold was not met; it does not convert the model's unmeasured work into a zero.

How does Solar Pro 4 perform on Korean benchmarks?

Solar Pro 4 has 1 source-displayable Korean benchmark score on this profile. Those rows remain separate from the global overall score because regional evaluations use a different comparison set. Use the dedicated Korean tables for side-by-side positions and inspect each source before applying the result elsewhere.

Which sibling models are related to Solar Pro 4?

Solar Pro 4 belongs to the Solar family. Related tracked variants include Solar Pro 2, Solar Pro 3. A sibling link indicates shared lineage or a documented configuration relationship; it does not mean the variants have identical pricing, context limits, benchmark evidence, or deployment behavior. Compare before switching.

Does Solar Pro 4 have full benchmark coverage on BenchLM?

No. Solar Pro 4 currently has 22 source-displayable rows across 434 tracked benchmark slots. The profile exposes published, non-generated evidence and leaves missing categories blank until an exact evaluation is available. Coverage describes how much was measured; it is not a penalty added to an individual benchmark result.

What is the context window size of Solar Pro 4?

Solar Pro 4 has a documented context window of 512K. That figure is the maximum combined prompt and retained-conversation space reported for this exact model; it is not the maximum output length. The profile keeps output limits separate because providers often publish those limits independently.

Compare Solar Pro 4 with every tracked model482 comparisons

Last updated September 10, 2026. Runtime fields remain blank until a sourced snapshot exists.

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