# BTL-4 vs Qwen3.5 Flash

> Side-by-side benchmark comparison for BTL-4 and Qwen3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/btl-4-vs-qwen3-5-flash
- Last updated: September 24, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for BTL-4 and Qwen3.5 Flash.

## Summary

- BTL-4 and Qwen3.5 Flash do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | BTL-4 | Qwen3.5 Flash |
|----------|----------|----------|
| Creator | Bad Theory Labs | Alibaba |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 1M |
| Independent public score (not head-to-head) | null | 45.49 |
| Benchmarks Covered | 3 | 6 |
| Pricing (input/output) | $0.00 / $0.00 | $0.10 / $0.40 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Qwen3.5 Flash public-lane score: Coming soon

| Benchmark | BTL-4 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 73.5% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Qwen3.5 Flash public-lane score: 26.5 (Estimated · #97/135)

| Benchmark | BTL-4 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 78.4% | Coming soon | Coming soon |
| LiveCodeBench v6 | 66.1% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 83.3% | Coming soon |
| SWE-bench (Vals) | Coming soon | 64.4% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Qwen3.5 Flash public-lane score: 43 (Estimated · #80/158)

| Benchmark | BTL-4 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 82.8% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 84.1% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Qwen3.5 Flash public-lane score: 28.4 (Unranked · 2 rankable rows)

| Benchmark | BTL-4 | Qwen3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 6.207% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 0.000% | Coming soon |

## FAQ

### Can I compare BTL-4 and Qwen3.5 Flash on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [BTL-4 vs BTL-3](/compare/btl-3-vs-btl-4)
- [Qwen3.5 Flash vs BTL-3](/compare/btl-3-vs-qwen3-5-flash)
- [BTL-4 vs BTL-4 Compact](/compare/btl-4-vs-btl-4-compact)
- [Qwen3.5 Flash vs BTL-4 Compact](/compare/btl-4-compact-vs-qwen3-5-flash)

## Explore More

- [BTL-4 profile](/models/btl-4)
- [Qwen3.5 Flash profile](/models/qwen3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)