# BTL-3 vs BTL-4

> Side-by-side benchmark comparison for BTL-3 and BTL-4 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/btl-3-vs-btl-4
- Last updated: September 10, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: BTL-3 and BTL-4 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.

## Model Snapshot

| Property | BTL-3 | BTL-4 |
|----------|----------|----------|
| Creator | Bad Theory Labs | Bad Theory Labs |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 262K |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 3 | 3 |
| Pricing (input/output) | $0.00 / $0.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- BTL-4 public-lane score: 49.9 (Estimated · #57/152)

| Benchmark | BTL-3 | BTL-4 | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 88.5% | 73.5% | BTL-3 |

### Coding

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- BTL-4 public-lane score: 49.8 (Estimated · #62/151)

| Benchmark | BTL-3 | BTL-4 | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 95.1% | Coming soon | Coming soon |
| LiveCodeBench v6 | 88.1% | 66.1% | BTL-3 |
| SWE-bench Verified | Coming soon | 78.4% | Coming soon |

## FAQ

### Is there enough evidence to pick between BTL-3 and BTL-4?

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

- [BTL-3 vs BTL-4 Compact](/compare/btl-3-vs-btl-4-compact)
- [BTL-4 vs BTL-4 Compact](/compare/btl-4-vs-btl-4-compact)
- [BTL-3 vs Claude Fable 5.1](/compare/btl-3-vs-claude-fable-5-1)
- [BTL-4 vs Claude Fable 5.1](/compare/btl-4-vs-claude-fable-5-1)

## Explore More

- [BTL-3 profile](/models/btl-3)
- [BTL-4 profile](/models/btl-4)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)