# BTL-4 vs Claude Sonnet 4.6

> Side-by-side benchmark comparison for BTL-4 and Claude Sonnet 4.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/btl-4-vs-claude-sonnet-4-6
- Last updated: September 24, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: BTL-4 and Claude Sonnet 4.6 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.
- BTL-4 has the lower published output-token price.
- BTL-4 has the larger published context window at 262K.

## Model Snapshot

| Property | BTL-4 | Claude Sonnet 4.6 |
|----------|----------|----------|
| Creator | Bad Theory Labs | Anthropic |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 262K | 200K |
| Independent public score (not head-to-head) | null | 56.35 |
| Benchmarks Covered | 3 | 26 |
| Pricing (input/output) | $0.00 / $0.00 | $3.00 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Sonnet 4.6 public-lane score: 41.8 (Supported · #44/105)

| Benchmark | BTL-4 | Claude Sonnet 4.6 | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 73.5% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 59.1% | Coming soon |
| OSWorld-Verified | Coming soon | 72.1% | Coming soon |
| Claw-Eval | Coming soon | 67.8% | Coming soon |
| CyberGym | Coming soon | 65.2% | Coming soon |
| Gert Labs | Coming soon | 62.92% | Coming soon |
| OSWorld 2.0 | Coming soon | 8.3% | Coming soon |
| JobBench | Coming soon | 36.9% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 57.3% | Coming soon |
| ApprenticeBench | Coming soon | 2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Sonnet 4.6 public-lane score: 48.1 (Supported · #41/135)

| Benchmark | BTL-4 | Claude Sonnet 4.6 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 78.4% | 79.6% | Claude Sonnet 4.6 |
| LiveCodeBench v6 | 66.1% | Coming soon | Coming soon |
| SWE-Rebench | Coming soon | 60.7% | Coming soon |
| React Native Evals | Coming soon | 80.6% | Coming soon |
| Vibe Code Bench | Coming soon | 51.48% | Coming soon |
| cursorBench31 | Coming soon | 48.8% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 24.3% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 82.1% | Coming soon |
| SWE-bench (Vals) | Coming soon | 77.4% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Sonnet 4.6 public-lane score: 69 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Sonnet 4.6 public-lane score: 54.1 (#35/50)

| Benchmark | BTL-4 | Claude Sonnet 4.6 | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | Coming soon | 77.4% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Sonnet 4.6 public-lane score: 53 (Supported · #48/158)

| Benchmark | BTL-4 | Claude Sonnet 4.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 89.9% | Coming soon |
| SuperGPQA | Coming soon | 95% | Coming soon |
| MMLU-Pro | Coming soon | 79.2% | Coming soon |
| HLE | Coming soon | 49% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 85.6% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 87.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Sonnet 4.6 public-lane score: 46.6 (#88/124)

### Mathematics

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Sonnet 4.6 public-lane score: 48.8 (Unranked · 2 rankable rows)

| Benchmark | BTL-4 | Claude Sonnet 4.6 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 32.400% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 8.300% | Coming soon |

## FAQ

### Is there enough evidence to pick between BTL-4 and Claude Sonnet 4.6?

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

- [BTL-4 vs BTL-3](/compare/btl-3-vs-btl-4)
- [Claude Sonnet 4.6 vs BTL-3](/compare/btl-3-vs-claude-sonnet-4-6)
- [BTL-4 vs BTL-4 Compact](/compare/btl-4-vs-btl-4-compact)
- [Claude Sonnet 4.6 vs BTL-4 Compact](/compare/btl-4-compact-vs-claude-sonnet-4-6)

## Explore More

- [BTL-4 profile](/models/btl-4)
- [Claude Sonnet 4.6 profile](/models/claude-sonnet-4-6)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)