# GPT-6 Luna vs GPT-6 Sol

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

- Canonical page: https://benchlm.ai/compare/gpt-6-luna-vs-gpt-6-sol
- Last updated: September 22, 2026

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

## Quick Verdict

Pick GPT-6 Sol if you want the stronger benchmark profile. GPT-6 Luna only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-6 Sol leads overall 80.45 to 62.33.
- The clearest category separation is in knowledge, where the averages are 63.6 for GPT-6 Luna and 80.2 for GPT-6 Sol.
- The biggest single benchmark swing is ExploitGym in Agentic, with scores of 11.6% and 22.1%.
- GPT-6 Luna is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | GPT-6 Luna | GPT-6 Sol |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1.05M |
| Overall Score | 62.33 | 80.45 |
| Benchmarks Covered | 7 | 10 |
| Pricing (input/output) | $0.10 / $0.50 | $2.00 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- GPT-6 Luna public-lane score: 56.7 (Estimated · #35/157)
- GPT-6 Sol public-lane score: 69.7 (Estimated · #7/157)

| Benchmark | GPT-6 Luna | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| ExploitGym | 11.6% | 22.1% | GPT-6 Sol |
| Agents' Last Exam | Coming soon | 56.4% | Coming soon |
| AutomationBench | Coming soon | 33.2% | Coming soon |
| OSWorld 2.0 | Coming soon | 60.5% | Coming soon |

### Coding

- Winner: Coming soon
- GPT-6 Luna public-lane score: 66.6 (Estimated · #11/159)
- GPT-6 Sol public-lane score: 74.3 (Estimated · #6/159)

| Benchmark | GPT-6 Luna | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 66.6% | 68.8% | GPT-6 Sol |

### Reasoning

- Winner: Coming soon
- GPT-6 Luna public-lane score: 78.3 (Unranked · 2 rankable rows)
- GPT-6 Sol public-lane score: 78.5 (#5/17)

### Multimodal & Grounded

- Winner: Coming soon
- GPT-6 Luna public-lane score: 71.3 (Unranked · 1 rankable row)
- GPT-6 Sol public-lane score: 82.8 (Unranked · 1 rankable row)

### Knowledge

- Winner: Coming soon
- GPT-6 Luna public-lane score: 63.6 (Estimated · #29/189)
- GPT-6 Sol public-lane score: 80.2 (Estimated · #6/189)

| Benchmark | GPT-6 Luna | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 50.0% | 47.1% | GPT-6 Luna |
| HealthBench (length-adjusted) | 54.5% | 53.2% | GPT-6 Luna |
| HealthBench Professional | 60.8% | 60.8% | Tie |
| HealthBench Professional (raw) | 61.2% | 59.5% | GPT-6 Luna |
| HealthBench Hard | 31.4% | 30.1% | GPT-6 Luna |

## FAQ

### Which is better overall, GPT-6 Luna or GPT-6 Sol?

GPT-6 Sol is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-6 Luna and GPT-6 Sol?

The widest category gap is in knowledge, where the averages are 63.6 for GPT-6 Luna and 80.2 for GPT-6 Sol.

### How many benchmarks does GPT-6 Luna cover on BenchLM?

GPT-6 Luna currently has 7 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-6 Sol cover on BenchLM?

GPT-6 Sol currently has 10 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-6 Luna vs GPT-6 Astra](/compare/gpt-6-astra-vs-gpt-6-luna)
- [GPT-6 Sol vs GPT-6 Astra](/compare/gpt-6-astra-vs-gpt-6-sol)
- [GPT-6 Luna vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-6-luna)
- [GPT-6 Sol vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-6-sol)

## Explore More

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