# GPT-6 Luna vs Hark Handoff 2

> Side-by-side benchmark comparison for GPT-6 Luna and Hark Handoff 2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-6-luna-vs-hark-handoff-2
- Last updated: November 12, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for GPT-6 Luna and Hark Handoff 2.

## Summary

- GPT-6 Luna and Hark Handoff 2 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 | GPT-6 Luna | Hark Handoff 2 |
|----------|----------|----------|
| Creator | OpenAI | Hark |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | null |
| Independent public score (not head-to-head) | 61 | null |
| Benchmarks Covered | 28 | 0 |
| Pricing (input/output) | $0.10 / $0.50 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 54.5 (Supported · #44/135)
- Hark Handoff 2 public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Hark Handoff 2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.1 | 15.20% | Coming soon | Coming soon |
| Agents' Last Exam (Linux) | 57.1% | Coming soon | Coming soon |
| ExploitGym | 11.6% | Coming soon | Coming soon |
| Hermes Index | 33.9% | Coming soon | Coming soon |
| Hermes Bench | 70.5% | Coming soon | Coming soon |
| MazeBench | 0% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 48.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 73.0% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 52 (Supported · #39/161)
- Hark Handoff 2 public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Hark Handoff 2 | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 66.6% | Coming soon | Coming soon |
| Bug Hunt Bench | 18.3 fixes | Coming soon | Coming soon |
| FrontierCode 2.0 | 21.9% | Coming soon | Coming soon |
| VulcanBench Frontier v4 | 71.9% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 54.3 (Supported · #47/160)
- Hark Handoff 2 public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Hark Handoff 2 | Winner |
|-----------|-----------|-----------|--------|
| BioBasicsBench | 37.6% | Coming soon | Coming soon |
| ARC-AGI-1 | 86.67% | Coming soon | Coming soon |
| ARC-AGI-2 | 59.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |
| ARC-AGI-3 Provider Adapter | 0.59% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 63.6 (Supported · #30/67)
- Hark Handoff 2 public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Hark Handoff 2 | Winner |
|-----------|-----------|-----------|--------|
| PerceptionBench (tools) | 62.8% | Coming soon | Coming soon |
| ExtractBench Pro | 0% | Coming soon | Coming soon |
| ExtractBench (LlamaIndex) | 91.01% | Coming soon | Coming soon |
| ParseBench | 64.13% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 62.4 (Supported · #42/180)
- Hark Handoff 2 public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Hark Handoff 2 | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 50.0% | Coming soon | Coming soon |
| HealthBench (length-adjusted) | 54.5% | Coming soon | Coming soon |
| HealthBench Professional | 60.8% | Coming soon | Coming soon |
| HealthBench Professional (raw) | 61.2% | Coming soon | Coming soon |
| HealthBench Hard | 31.4% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 78.7 (Unranked · 2 rankable rows)
- Hark Handoff 2 public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Hark Handoff 2 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 78.947% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 56.098% | Coming soon | Coming soon |

## FAQ

### Can I compare GPT-6 Luna and Hark Handoff 2 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

- [GPT-6 Luna vs GPT-6 Astra](/compare/gpt-6-astra-vs-gpt-6-luna)
- [Hark Handoff 2 vs GPT-6 Astra](/compare/gpt-6-astra-vs-hark-handoff-2)
- [GPT-6 Luna vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-luna)
- [Hark Handoff 2 vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-hark-handoff-2)

## Explore More

- [GPT-6 Luna profile](/models/gpt-6-luna)
- [Hark Handoff 2 profile](/models/hark-handoff-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)