# Solar Pro 4 vs Step 3.7 Flash

> Side-by-side benchmark comparison for Solar Pro 4 and Step 3.7 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/solar-pro-4-vs-step-3-7-flash
- Last updated: September 10, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Solar Pro 4 and Step 3.7 Flash share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Step 3.7 Flash has the lower published output-token price.
- Solar Pro 4 has the larger published context window at 512K.

## Model Snapshot

| Property | Solar Pro 4 | Step 3.7 Flash |
|----------|----------|----------|
| Creator | Upstage | StepFun |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 512K | 256K |
| Independent public score (not head-to-head) | null | 49.95 |
| Benchmarks Covered | 10 | 11 |
| Pricing (input/output) | $0.30 / $1.20 | $0.20 / $1.15 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Solar Pro 4 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 48.6 (Estimated · #64/152)

| Benchmark | Solar Pro 4 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 57.0% | Coming soon | Coming soon |
| BrowseComp | 49.2% | 75.8% | Step 3.7 Flash |
| MCP Atlas | 61.4% | Coming soon | Coming soon |
| APEX-Agents | 18.7% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 59.5% | Coming soon |
| DeepSearchQA | Coming soon | 92.8% | Coming soon |
| Toolathlon | Coming soon | 49.5% | Coming soon |
| Claw-Eval | Coming soon | 67.1% | Coming soon |
| HLE w/ tools | Coming soon | 47.2% | Coming soon |
| Gert Labs | Coming soon | 51.57% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Solar Pro 4 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 47.1 (Estimated · #75/151)

| Benchmark | Solar Pro 4 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 57.0% | Coming soon | Coming soon |
| SWE-bench Verified | 70.6% | Coming soon | Coming soon |
| LiveCodeBench | 87.8% | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 56.3% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 59.5% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Solar Pro 4 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 70.9 (Unranked · 3 rankable rows)

| Benchmark | Solar Pro 4 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| SimpleVQA | Coming soon | 79.2% | Coming soon |
| V* | Coming soon | 95.3% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Solar Pro 4 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 71.7 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Solar Pro 4 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 48.4 (Estimated · #92/183)

| Benchmark | Solar Pro 4 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 89.0% | Coming soon | Coming soon |
| MMLU-Pro | 86.3% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Solar Pro 4 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: 82.1 (#52/123)

### Mathematics

- Winner: Insufficient shared evidence
- Solar Pro 4 public-lane score: Coming soon
- Step 3.7 Flash public-lane score: Coming soon

| Benchmark | Solar Pro 4 | Step 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.3% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Solar Pro 4 and Step 3.7 Flash?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Solar Pro 4 vs Solar Pro 2](/compare/solar-pro-2-vs-solar-pro-4)
- [Step 3.7 Flash vs Solar Pro 2](/compare/solar-pro-2-vs-step-3-7-flash)
- [Solar Pro 4 vs Solar Pro 3](/compare/solar-pro-3-vs-solar-pro-4)
- [Step 3.7 Flash vs Solar Pro 3](/compare/solar-pro-3-vs-step-3-7-flash)

## Explore More

- [Solar Pro 4 profile](/models/solar-pro-4)
- [Step 3.7 Flash profile](/models/step-3-7-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)