# BTL-3 vs Claude Opus 4.5

> Side-by-side benchmark comparison for BTL-3 and Claude Opus 4.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/btl-3-vs-claude-opus-4-5
- Last updated: September 10, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: BTL-3 and Claude Opus 4.5 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-3 has the lower published output-token price.
- BTL-3 has the larger published context window at 262K.

## Model Snapshot

| Property | BTL-3 | Claude Opus 4.5 |
|----------|----------|----------|
| Creator | Bad Theory Labs | Anthropic |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 262K | 200K |
| Independent public score (not head-to-head) | null | 58.41 |
| Benchmarks Covered | 3 | 45 |
| Pricing (input/output) | $0.00 / $0.00 | $5.00 / $25.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 43.2 (Estimated · #97/152)

| Benchmark | BTL-3 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 88.5% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 59.3% | Coming soon |
| OSWorld-Verified | Coming soon | 66.3% | Coming soon |
| OSWorld | Coming soon | 66.3% | Coming soon |
| Claw-Eval | Coming soon | 59.6% | Coming soon |
| QwenClawBench | Coming soon | 52.3% | Coming soon |
| τ³-bench results | Coming soon | 70.2% | Coming soon |
| VITA-Bench | Coming soon | 23.3% | Coming soon |
| DeepPlanning | Coming soon | 26.4% | Coming soon |
| Toolathlon | Coming soon | 43.5% | Coming soon |
| MCP Atlas | Coming soon | 42.3% | Coming soon |
| MCP-Tasks | Coming soon | 71.8% | Coming soon |
| WideResearch | Coming soon | 76.4% | Coming soon |
| CyberGym | Coming soon | 50.6% | Coming soon |
| Gert Labs | Coming soon | 64.23% | Coming soon |
| JobBench | Coming soon | 32.3% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 56.6 (Estimated · #36/151)

| Benchmark | BTL-3 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 95.1% | Coming soon | Coming soon |
| LiveCodeBench v6 | 88.1% | 84.8% | BTL-3 |
| SWE-bench Verified | Coming soon | 80.9% | Coming soon |
| SWE-bench Pro | Coming soon | 57.1% | Coming soon |
| SWE Multilingual | Coming soon | 77.5% | Coming soon |
| NL2Repo | Coming soon | 43.2% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 23.5 (#46/48)

| Benchmark | BTL-3 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 70.6% | Coming soon |
| MathVision | Coming soon | 74.3% | Coming soon |
| CharXiv | Coming soon | 68.5% | Coming soon |
| VideoMMMU | Coming soon | 84.4% | Coming soon |
| ScreenSpot Pro | Coming soon | 45.7% | Coming soon |
| V* | Coming soon | 67.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 72.1 (Unranked · 4 rankable rows)

| Benchmark | BTL-3 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | Coming soon | 64.4% | Coming soon |
| AI-Needle | Coming soon | 74% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 53.9 (Estimated · #61/183)

| Benchmark | BTL-3 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 87% | Coming soon |
| SuperGPQA | Coming soon | 70.6% | Coming soon |
| MMLU-Pro | Coming soon | 89.5% | Coming soon |
| MMLU-Redux | Coming soon | 96.6% | Coming soon |
| C-Eval | Coming soon | 92.2% | Coming soon |
| HLE | Coming soon | 30.8% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 39.5 (#105/123)

| Benchmark | BTL-3 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 90.9% | Coming soon |
| IFBench | Coming soon | 58% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 82.9 (#2/12)

| Benchmark | BTL-3 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | Coming soon | 85.7% | Coming soon |
| NOVA-63 | Coming soon | 56.7% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- Claude Opus 4.5 public-lane score: 58.3 (#6/7)

| Benchmark | BTL-3 | Claude Opus 4.5 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 95.1% | Coming soon |
| HMMT Feb 2025 | Coming soon | 92.9% | Coming soon |
| HMMT Nov 2025 | Coming soon | 93.3% | Coming soon |
| HMMT Feb 2026 | Coming soon | 85.3% | Coming soon |
| MMAnswerBench | Coming soon | 84.0% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 20.690% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 4.167% | Coming soon |

## FAQ

### Is there enough evidence to pick between BTL-3 and Claude Opus 4.5?

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-3 vs BTL-4](/compare/btl-3-vs-btl-4)
- [Claude Opus 4.5 vs BTL-4](/compare/btl-4-vs-claude-opus-4-5)
- [BTL-3 vs BTL-4 Compact](/compare/btl-3-vs-btl-4-compact)
- [Claude Opus 4.5 vs BTL-4 Compact](/compare/btl-4-compact-vs-claude-opus-4-5)

## Explore More

- [BTL-3 profile](/models/btl-3)
- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)