Agentic
Not comparable- Muse Spark
- 56.1
- Supported · #34/152
- Solar Pro 4
- Not ranked
- Basis
- BenchAlign lane · 5 vs 4 public rows
- Reading
- Not comparable
Muse Spark vs Solar Pro 4
Updated September 10, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
Decision reading
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner.
2 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
Share or export
Which one for your work
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
Long documents
Prompts that approach the documented context limit
Solar Pro 4
Solar Pro 4 has the larger documented context window.
Confidence: documented
Show secondary and unsupported calls
Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
Solar Pro 4 is not ranked on the public lane for coding, so no winner is named for coding.
Confidence: limited
Agentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Solar Pro 4 is not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limited
Chat turn cost
1K fresh input + 500 output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Repository review cost
50K fresh input + 3K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
22 Muse Spark only
2 Shared
8 Solar Pro 4 only
- Shared results
- 2
- Muse Spark only
- 22
- Solar Pro 4 only
- 8
- Like-for-like categories
- 0 / 8
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign lane for agentic, coding, and knowledge, and the weighted public rows elsewhere, with the same rank each model page reports. A row is like-for-like only when both scores rest on Supported evidence or the same weighted set. Directional and not-comparable rows remain visible, but they never receive a winner.
Coding
Not comparable- Muse Spark
- 59.0
- Supported · #25/151
- Solar Pro 4
- Not ranked
- Basis
- BenchAlign lane · 4 vs 3 public rows
- Reading
- Not comparable
Reasoning
Not comparable- Muse Spark
- 45.1
- Unranked · 3 rankable rows
- Solar Pro 4
- Not ranked
- Basis
- Provisional lane · 1 vs 0 weighted rows
- Reading
- Not comparable
Knowledge
Not comparable- Muse Spark
- 65.4
- Supported · #24/183
- Solar Pro 4
- Not ranked
- Basis
- BenchAlign lane · 5 vs 2 public rows
- Reading
- Not comparable
Math
Not comparable- Muse Spark
- 55.3
- Unranked · 2 rankable rows
- Solar Pro 4
- Not ranked
- Basis
- Provisional lane · 2 vs 1 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Muse Spark
- Not ranked
- Solar Pro 4
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Muse Spark
- 77.5
- #14/48
- Solar Pro 4
- Not ranked
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Muse Spark
- 93.2
- #8/123
- Solar Pro 4
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | Muse Spark | Solar Pro 4 | Basis | Reading |
|---|---|---|---|---|
| Agentic | 56.1Supported · #34/152 | Not ranked | Not comparableBenchAlign lane · 5 vs 4 public rows | Not comparable |
| Coding | 59.0Supported · #25/151 | Not ranked | Not comparableBenchAlign lane · 4 vs 3 public rows | Not comparable |
| Reasoning | 45.1Unranked · 3 rankable rows | Not ranked | Not comparableProvisional lane · 1 vs 0 weighted rows | Not comparable |
| Knowledge | 65.4Supported · #24/183 | Not ranked | Not comparableBenchAlign lane · 5 vs 2 public rows | Not comparable |
| Math | 55.3Unranked · 2 rankable rows | Not ranked | Not comparableProvisional lane · 2 vs 1 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multimodal | 77.5#14/48 | Not ranked | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Instruction following | 93.2#8/123 | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign) differ from the provisional-lane categories. Unranked scores sit on the lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
Shape of the matched evidence
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.
SWE-bench Verified
Coding
What each workload costs
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
Chat turn
1K fresh input + 500 output tokens
- Muse Spark
- API rate not published
- Fits in one request
- Solar Pro 4
- $0.0009
- Fits in one request
Muse Spark has no comparable published API token rate.
Repository review
50K fresh input + 3K output tokens
- Muse Spark
- API rate not published
- Fits in one request
- Solar Pro 4
- $0.0186
- Fits in one request
Muse Spark has no comparable published API token rate.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- Muse Spark
- API rate not published
- Fits in one request
- Cached-input rate unavailable
- Solar Pro 4
- $0.03
- Fits in one request
Muse Spark has no comparable published API token rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationMuse SparkSolar Pro 4
Context window
Maximum documented context; output-token limits may be lower.
Muse Spark
262K
Solar Pro 4
API model ID
Muse Spark
Not sourced
Solar Pro 4
solar-pro4
Upstage Solar Pro 4 launch postCached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Muse Spark
No comparable hosted API rate
Solar Pro 4
$0.06 per 1M cached input tokens
Upstage Solar Pro 4 launch postDocumented inputs
Muse Spark
Not sourced
Solar Pro 4
Not sourced
Documented outputs
Muse Spark
Not sourced
Solar Pro 4
Not sourced
Provider availability
Muse Spark
Not sourced
Solar Pro 4
Not sourced
Reasoning profile
Muse Spark
Reasoning
Solar Pro 4
Reasoning
Weight access
Muse Spark
Proprietary
Solar Pro 4
Proprietary
License
Muse Spark
Proprietary
Solar Pro 4
Proprietary
Release date
Muse Spark
2026-04-08
Solar Pro 4
2026-08-11
If you already use one of these models
- Deployment change
- The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
- Quality signal
- At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner.
- Workload cost
- A complete comparable API-rate estimate is not available for both models.
- Context tradeoff
- Solar Pro 4 has the larger documented window (512K).
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence32 rows
Agentic
Terminal-Bench 2.0
Muse Spark59%SourceSolar Pro 4—Not directly comparable
τ²-bench results
Muse Spark91.5%SourceSolar Pro 4—Not directly comparable
DeepSearchQA
Muse Spark74.8%SourceSolar Pro 4—Not directly comparable
CyberGym
Muse Spark43.5%SourceSolar Pro 4—Not directly comparable
Claw-Eval
Muse Spark63.8%SourceSolar Pro 4—Not directly comparable
Terminal-Bench 2.1
Muse Spark—Solar Pro 457.0%SourceNot directly comparable
BrowseComp
Muse Spark—Solar Pro 449.2%SourceNot directly comparable
MCP Atlas
Muse Spark—Solar Pro 461.4%SourceNot directly comparable
APEX-Agents
Muse Spark—Solar Pro 418.7%SourceNot directly comparable
Coding
SWE-bench Verified
Muse Spark77.4%SourceSolar Pro 470.6%SourceMuse Spark leads this result
SWE-bench Pro
Muse Spark52.4%SourceSolar Pro 4—Not directly comparable
LiveCodeBench Pro
Muse Spark80.0%SourceSolar Pro 4—Not directly comparable
Vibe Code Bench
Muse Spark19.67%SourceSolar Pro 4—Not directly comparable
Terminal-Bench 2.1
Muse Spark—Solar Pro 457.0%SourceNot directly comparable
LiveCodeBench
Muse Spark—Solar Pro 487.8%SourceNot directly comparable
Reasoning
ARC-AGI-2
Muse Spark42.5%SourceSolar Pro 4—Not directly comparable
Knowledge
GPQA-D
Muse Spark89.5%SourceSolar Pro 489.0%SourceMuse Spark leads this result
HLE
Muse Spark50.4%SourceSolar Pro 4—Not directly comparable
HLE w/o tools
Muse Spark42.8%SourceSolar Pro 4—Not directly comparable
HealthBench Hard
Muse Spark42.8%SourceSolar Pro 4—Not directly comparable
MedXpertQA (Text)
Muse Spark52.6%SourceSolar Pro 4—Not directly comparable
MMLU-Pro
Muse Spark—Solar Pro 486.3%SourceNot directly comparable
Math
Multimodal
CharXiv
Muse Spark86.4%SourceSolar Pro 4—Not directly comparable
MMMU-Pro
Muse Spark80.4%SourceSolar Pro 4—Not directly comparable
ERQA
Muse Spark64.7%SourceSolar Pro 4—Not directly comparable
SimpleVQA
Muse Spark71.3%SourceSolar Pro 4—Not directly comparable
ScreenSpot Pro
Muse Spark84.1%SourceSolar Pro 4—Not directly comparable
ZeroBench
Muse Spark33.0%SourceSolar Pro 4—Not directly comparable
MedXpertQA (MM)
Muse Spark78.4%SourceSolar Pro 4—Not directly comparable
Frequently asked questions
Which is better, Muse Spark or Solar Pro 4?
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, Muse Spark or Solar Pro 4?
Solar Pro 4 is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, Muse Spark or Solar Pro 4?
Solar Pro 4 is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, Muse Spark or Solar Pro 4?
Both models do not have comparable published API token rates, so this page does not name a universal price winner.
Which has the larger context window, Muse Spark or Solar Pro 4?
Solar Pro 4 has the larger documented context window: 512K, compared with 262K.
Related comparisons
Last updated September 10, 2026
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