# GPT-6.1 Terra vs GPT-6 Sol

> Side-by-side benchmark comparison for GPT-6.1 Terra and GPT-6 Sol across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-6-1-terra-vs-gpt-6-sol
- Last updated: October 26, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

GPT-6 Sol leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- GPT-6 Sol has the higher overall point estimate 78.83 to 75.87. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 72.4 for GPT-6.1 Terra and 57.9 for GPT-6 Sol.
- The biggest single benchmark swing is HealthBench Professional (raw) in Knowledge, with scores of 64.2% and 59.5%.
- GPT-6.1 Terra is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | GPT-6.1 Terra | GPT-6 Sol |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1.05M |
| Overall Score | 75.87 | 78.83 |
| Benchmarks Covered | 10 | 23 |
| Pricing (input/output) | $1.00 / $5.00 | $2.00 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- GPT-6.1 Terra public-lane score: 72.4 (Estimated · #8/133)
- GPT-6 Sol public-lane score: 57.9 (Supported · #38/133)

| Benchmark | GPT-6.1 Terra | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 50.30% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 58.3% | Coming soon | Coming soon |
| Agents' Last Exam | 60.0% | 56.4% | GPT-6.1 Terra |
| OSWorld 2.1 Offline | 74.2% | Coming soon | Coming soon |
| AutomationBench | Coming soon | 33.2% | Coming soon |
| OSWorld 2.0 | Coming soon | 60.5% | Coming soon |
| ExploitGym | Coming soon | 22.1% | Coming soon |
| CWE-bench v1 | Coming soon | 52.0% | Coming soon |
| Hermes Index | Coming soon | 44.1% | Coming soon |
| Hermes Bench | Coming soon | 73.5% | Coming soon |
| MazeBench | Coming soon | 7% | Coming soon |

### Coding

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: Coming soon
- GPT-6 Sol public-lane score: 66.3 (Supported · #12/154)

| Benchmark | GPT-6.1 Terra | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | Coming soon | 68.8% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: 81.8 (Unranked · 2 rankable rows)
- GPT-6 Sol public-lane score: 73.1 (#14/26)

| Benchmark | GPT-6.1 Terra | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | Coming soon | 95.50% | Coming soon |
| ARC-AGI-2 | Coming soon | 89.6% | Coming soon |
| ARC-AGI-3 | Coming soon | 4.6% | Coming soon |
| ARC-AGI-3 Provider Adapter | Coming soon | 23.03% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: 91.6 (#4/58)
- GPT-6 Sol public-lane score: 87.5 (Unranked · 1 rankable row)

| Benchmark | GPT-6.1 Terra | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 85.5% | Coming soon | Coming soon |
| ExtractBench (LlamaIndex) | Coming soon | 94.57% | Coming soon |
| ParseBench | Coming soon | 68.89% | Coming soon |

### Knowledge

- Winner: Directional only
- GPT-6.1 Terra public-lane score: 74.9 (Supported · #12/188)
- GPT-6 Sol public-lane score: 79.4 (Estimated · #9/188)

| Benchmark | GPT-6.1 Terra | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 51.1% | 47.1% | GPT-6.1 Terra |
| HealthBench (length-adjusted) | 55.1% | 53.2% | GPT-6.1 Terra |
| HealthBench Professional | 62.7% | 60.8% | GPT-6.1 Terra |
| HealthBench Professional (raw) | 64.2% | 59.5% | GPT-6.1 Terra |
| HealthBench Hard | 31.4% | 30.1% | GPT-6.1 Terra |

### Instruction Following

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: Coming soon
- GPT-6 Sol public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 10.1% | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: Coming soon
- GPT-6 Sol public-lane score: 97.3 (Unranked · 2 rankable rows)

| Benchmark | GPT-6.1 Terra | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 89.825% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 90.000% | Coming soon |

## FAQ

### Which is better overall, GPT-6.1 Terra or GPT-6 Sol?

GPT-6 Sol has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between GPT-6.1 Terra and GPT-6 Sol?

The widest category gap is in agentic, where the averages are 72.4 for GPT-6.1 Terra and 57.9 for GPT-6 Sol.

### How many benchmarks does GPT-6.1 Terra cover on BenchLM?

GPT-6.1 Terra currently has 10 sourced benchmark scores on BenchLM.

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

GPT-6 Sol currently has 23 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-6.1 Terra vs GPT-6 Astra](/compare/gpt-6-1-terra-vs-gpt-6-astra)
- [GPT-6 Sol vs GPT-6 Astra](/compare/gpt-6-astra-vs-gpt-6-sol)
- [GPT-6.1 Terra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-1-terra)
- [GPT-6 Sol vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-sol)

## Explore More

- [GPT-6.1 Terra profile](/models/gpt-6-1-terra)
- [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)