# GPT-6 Luna vs Mercury Voice

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

- Canonical page: https://benchlm.ai/compare/gpt-6-luna-vs-mercury-voice
- Last updated: September 29, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for GPT-6 Luna and Mercury Voice.

## Summary

- GPT-6 Luna and Mercury Voice 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 | Mercury Voice |
|----------|----------|----------|
| Creator | OpenAI | Inception |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 128K |
| Independent public score (not head-to-head) | 66.07 | null |
| Benchmarks Covered | 10 | 0 |
| Pricing (input/output) | $0.10 / $0.50 | $0.40 / $1.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 55.5 (Estimated · #32/117)
- Mercury Voice public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Mercury Voice | Winner |
|-----------|-----------|-----------|--------|
| ExploitGym | 11.6% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 51.4 (Supported · #38/143)
- Mercury Voice public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Mercury Voice | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 66.6% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 55.6 (#25/27)
- Mercury Voice public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Mercury Voice | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 86.70% | Coming soon | Coming soon |
| ARC-AGI-2 | 59.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 72.3 (Unranked · 1 rankable row)
- Mercury Voice public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 65 (Supported · #24/169)
- Mercury Voice public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Mercury Voice | 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 |

## FAQ

### Can I compare GPT-6 Luna and Mercury Voice 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)
- [Mercury Voice vs GPT-6 Astra](/compare/gpt-6-astra-vs-mercury-voice)
- [GPT-6 Luna vs GPT-6 Sol](/compare/gpt-6-luna-vs-gpt-6-sol)
- [Mercury Voice vs GPT-6 Sol](/compare/gpt-6-sol-vs-mercury-voice)

## Explore More

- [GPT-6 Luna profile](/models/gpt-6-luna)
- [Mercury Voice profile](/models/mercury-voice)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)