# BTL-4 vs Claude Opus 4.8

> Side-by-side benchmark comparison for BTL-4 and Claude Opus 4.8 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/btl-4-vs-claude-opus-4-8
- 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 Opus 4.8 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.
- Claude Opus 4.8 has the larger published context window at 1M.

## Model Snapshot

| Property | BTL-4 | Claude Opus 4.8 |
|----------|----------|----------|
| Creator | Bad Theory Labs | Anthropic |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 1M |
| Independent public score (not head-to-head) | null | 70.46 |
| Benchmarks Covered | 3 | 38 |
| Pricing (input/output) | $0.00 / $0.00 | $5.00 / $25.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Opus 4.8 public-lane score: 61.3 (Supported · #13/105)

| Benchmark | BTL-4 | Claude Opus 4.8 | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 73.5% | Coming soon | Coming soon |
| Terminal-Bench 3.0 | Coming soon | 21.1% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 74.6% | Coming soon |
| BrowseComp | Coming soon | 84.3% | Coming soon |
| DeepSearchQA | Coming soon | 93.1% | Coming soon |
| OSWorld-Verified | Coming soon | 83.4% | Coming soon |
| Finance Agent v2 | Coming soon | 53.9% | Coming soon |
| MCP Atlas | Coming soon | 82.2% | Coming soon |
| Toolathlon | Coming soon | 59.9% | Coming soon |
| Gert Labs | Coming soon | 72.97% | Coming soon |
| ResearchClawBench | Coming soon | 21.1% | Coming soon |
| OSWorld 2.0 | Coming soon | 20.6% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 71.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Opus 4.8 public-lane score: 63.3 (Supported · #12/135)

| Benchmark | BTL-4 | Claude Opus 4.8 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 78.4% | 88.6% | Claude Opus 4.8 |
| LiveCodeBench v6 | 66.1% | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 69.2% | Coming soon |
| SWE Multilingual | Coming soon | 84.4% | Coming soon |
| SWE Multimodal | Coming soon | 38.4% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 74.6% | Coming soon |
| cursorBench31 | Coming soon | 58.4% | Coming soon |
| cursorBench32 | Coming soon | 62.3% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 46.5% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 87.8% | Coming soon |
| SWE-bench (Vals) | Coming soon | 88.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Opus 4.8 public-lane score: 59 (#15/19)

| Benchmark | BTL-4 | Claude Opus 4.8 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | Coming soon | 72.1% | Coming soon |
| ARC-AGI-3 | Coming soon | 1.5% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Opus 4.8 public-lane score: 87.7 (#4/50)

| Benchmark | BTL-4 | Claude Opus 4.8 | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 66.2% | Coming soon |
| ScreenSpot Pro | Coming soon | 87.9% | Coming soon |
| CharXiv | Coming soon | 89.9% | Coming soon |
| CharXiv w/o tools | Coming soon | 80.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Opus 4.8 public-lane score: 70 (Supported · #11/158)

| Benchmark | BTL-4 | Claude Opus 4.8 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 93.6% | Coming soon |
| GPQA-D | Coming soon | 93.6% | Coming soon |
| HLE | Coming soon | 57.9% | Coming soon |
| HLE w/o tools | Coming soon | 49.8% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 92.4% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 89.6% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Opus 4.8 public-lane score: Coming soon

| Benchmark | BTL-4 | Claude Opus 4.8 | Winner |
|-----------|-----------|-----------|--------|
| INCLUDE | Coming soon | 87.6% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Opus 4.8 public-lane score: 74 (#60/124)

### Mathematics

- Winner: Insufficient shared evidence
- BTL-4 public-lane score: Coming soon
- Claude Opus 4.8 public-lane score: 65.2 (#2/7)

| Benchmark | BTL-4 | Claude Opus 4.8 | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | Coming soon | 96.7% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 47.241% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 31.250% | Coming soon |

## FAQ

### Is there enough evidence to pick between BTL-4 and Claude Opus 4.8?

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 Opus 4.8 vs BTL-3](/compare/btl-3-vs-claude-opus-4-8)
- [BTL-4 vs BTL-4 Compact](/compare/btl-4-vs-btl-4-compact)
- [Claude Opus 4.8 vs BTL-4 Compact](/compare/btl-4-compact-vs-claude-opus-4-8)

## Explore More

- [BTL-4 profile](/models/btl-4)
- [Claude Opus 4.8 profile](/models/claude-opus-4-8)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)