# DeepSeek V4.1 Flash vs SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ)

> Side-by-side benchmark comparison for DeepSeek V4.1 Flash and SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/deepseek-v4-1-flash-vs-jevbench-semif-qwen3-5-4b
- Last updated: September 30, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: DeepSeek V4.1 Flash and SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) has the lower published output-token price.
- DeepSeek V4.1 Flash has the larger published context window at 1M.

## Model Snapshot

| Property | DeepSeek V4.1 Flash | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) |
|----------|----------|----------|
| Creator | DeepSeek | Theodore Lee (TheoLeeCJ) |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M | null |
| Independent public score (not head-to-head) | 64.63 | null |
| Benchmarks Covered | 26 | 2 |
| Pricing (input/output) | $0.30 / $1.20 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- DeepSeek V4.1 Flash public-lane score: 61.1 (Supported · #20/119)
- SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 90.6% | Coming soon | Coming soon |
| terminalBench3 | 30% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 31.20% | Coming soon | Coming soon |
| CyberGym | 88.1% | Coming soon | Coming soon |
| ExploitGym | 15.3% | Coming soon | Coming soon |
| HLE w/ tools | 63.9% | Coming soon | Coming soon |
| AutomationBench | 54.8% | Coming soon | Coming soon |
| Agents' Last Exam | 31.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 74.5% | Coming soon | Coming soon |
| CWE-bench v1 | 55.0% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- DeepSeek V4.1 Flash public-lane score: 58.9 (Estimated · #23/144)
- SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) | Winner |
|-----------|-----------|-----------|--------|
| Codeforces | 3471.0 | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 90.6% | Coming soon | Coming soon |
| terminalBench3 | 30% | Coming soon | Coming soon |
| DeepSWE | 74.2% | Coming soon | Coming soon |
| ProgramBench | 20.3% | Coming soon | Coming soon |
| NL2Repo | 65.4% | Coming soon | Coming soon |
| OpenHarmony Bench | 60.3% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- DeepSeek V4.1 Flash public-lane score: 79.6 (Unranked · 4 rankable rows)
- SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) | Winner |
|-----------|-----------|-----------|--------|
| JevBench 1.4 | 4.77 | 47.69 | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) |
| JevBench 1.5 | 6.65 | 68.66 | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- DeepSeek V4.1 Flash public-lane score: 74.5 (Unranked · 1 rankable row)
- SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) | Winner |
|-----------|-----------|-----------|--------|
| Chartography (tools) | 78.9% | Coming soon | Coming soon |
| BabyVision w/ Python | 89.6% | Coming soon | Coming soon |
| ZeroBench w/ Python | 49.0% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- DeepSeek V4.1 Flash public-lane score: 64.9 (Supported · #25/170)
- SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 90.9% | Coming soon | Coming soon |
| GPQA-D | 90.9% | Coming soon | Coming soon |
| HLE | 36.8% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- DeepSeek V4.1 Flash public-lane score: Coming soon
- SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) | Winner |
|-----------|-----------|-----------|--------|
| Apex | 65.6% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between DeepSeek V4.1 Flash and SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ)?

Not yet. The models share only 2 sourced benchmark rows, 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

- [DeepSeek V4.1 Flash vs GPT-6 Astra](/compare/deepseek-v4-1-flash-vs-gpt-6-astra)
- [SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) vs GPT-6 Astra](/compare/gpt-6-astra-vs-jevbench-semif-qwen3-5-4b)
- [DeepSeek V4.1 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-deepseek-v4-1-flash)
- [SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-jevbench-semif-qwen3-5-4b)

## Explore More

- [DeepSeek V4.1 Flash profile](/models/deepseek-v4-1-flash)
- [SemIf, formerly OpenJev (Qwen3.5-4B, TheoLeeCJ) profile](/models/jevbench-semif-qwen3-5-4b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)