# BTL-4 vs Inkling

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

- Canonical page: https://benchlm.ai/compare/btl-4-vs-inkling
- 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 Inkling 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.
- Inkling has the larger published context window at 1M.

## Model Snapshot

| Property | BTL-4 | Inkling |
|----------|----------|----------|
| Creator | Bad Theory Labs | Thinking Machines Lab |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Hybrid |
| Context | 262K | 1M |
| Independent public score (not head-to-head) | null | 54.17 |
| Benchmarks Covered | 3 | 21 |
| Pricing (input/output) | $0.00 / $0.00 | $1.87 / $4.68 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Inkling public-lane score: 36.2 (Supported · #51/105)

| Benchmark | BTL-4 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 73.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| BrowseComp | Coming soon | 77.1% | Coming soon |
| MCP Atlas | Coming soon | 74.1% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 47.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Inkling public-lane score: 36.7 (Supported · #66/135)

| Benchmark | BTL-4 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 78.4% | 77.6% | BTL-4 |
| LiveCodeBench v6 | 66.1% | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 54.3% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| FrontierSWE v2 | Coming soon | 4.1% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 77.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Inkling public-lane score: 75.2 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Inkling public-lane score: 47.6 (#41/50)

| Benchmark | BTL-4 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 73.5% | Coming soon |
| CharXiv | Coming soon | 82% | Coming soon |
| CharXiv w/o tools | Coming soon | 78.1% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Inkling public-lane score: 53.5 (Supported · #45/158)

| Benchmark | BTL-4 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 87.9% | Coming soon |
| GPQA-D | Coming soon | 87.9% | Coming soon |
| HLE | Coming soon | 46% | Coming soon |
| HLE w/o tools | Coming soon | 30% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 87.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Inkling public-lane score: 83.9 (#44/124)

| Benchmark | BTL-4 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 79.8% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Inkling public-lane score: 78.5 (Unranked · 1 rankable row)

| Benchmark | BTL-4 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 97.1% | Coming soon |

## FAQ

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

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)
- [Inkling vs BTL-3](/compare/btl-3-vs-inkling)
- [BTL-4 vs BTL-4 Compact](/compare/btl-4-vs-btl-4-compact)
- [Inkling vs BTL-4 Compact](/compare/btl-4-compact-vs-inkling)

## Explore More

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