# BTL-3 vs GPT-5.1

> Side-by-side benchmark comparison for BTL-3 and GPT-5.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/btl-3-vs-gpt-5-1
- Last updated: September 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for BTL-3 and GPT-5.1.

## Summary

- BTL-3 and GPT-5.1 do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | BTL-3 | GPT-5.1 |
|----------|----------|----------|
| Creator | Bad Theory Labs | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 200K |
| Independent public score (not head-to-head) | null | 63.03 |
| Benchmarks Covered | 3 | 4 |
| Pricing (input/output) | $0.00 / $0.00 | $1.25 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- GPT-5.1 public-lane score: 59.4 (Estimated · #24/152)

| Benchmark | BTL-3 | GPT-5.1 | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 88.5% | Coming soon | Coming soon |
| Gert Labs | Coming soon | 41.24% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- GPT-5.1 public-lane score: 45 (Supported · #89/151)

| Benchmark | BTL-3 | GPT-5.1 | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 95.1% | Coming soon | Coming soon |
| LiveCodeBench v6 | 88.1% | Coming soon | Coming soon |
| Vibe Code Bench | Coming soon | 24.61% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- GPT-5.1 public-lane score: 71.2 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- GPT-5.1 public-lane score: 76 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- GPT-5.1 public-lane score: 58.1 (Estimated · #41/183)

### Instruction Following

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- GPT-5.1 public-lane score: 89.3 (#26/123)

### Mathematics

- Winner: Insufficient shared evidence
- BTL-3 public-lane score: Coming soon
- GPT-5.1 public-lane score: 49.2 (Unranked · 2 rankable rows)

| Benchmark | BTL-3 | GPT-5.1 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 31.034% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 12.500% | Coming soon |

## FAQ

### Can I compare BTL-3 and GPT-5.1 on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [BTL-3 vs BTL-4](/compare/btl-3-vs-btl-4)
- [GPT-5.1 vs BTL-4](/compare/btl-4-vs-gpt-5-1)
- [BTL-3 vs BTL-4 Compact](/compare/btl-3-vs-btl-4-compact)
- [GPT-5.1 vs BTL-4 Compact](/compare/btl-4-compact-vs-gpt-5-1)

## Explore More

- [BTL-3 profile](/models/btl-3)
- [GPT-5.1 profile](/models/gpt-5-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)