# GPT-5.6 Sol vs GPT-6.1 Terra

> Side-by-side benchmark comparison for GPT-5.6 Sol and GPT-6.1 Terra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-6-sol-vs-gpt-6-1-terra
- Last updated: October 26, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.6 Sol and GPT-6.1 Terra share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-6.1 Terra has the lower published output-token price.

## Model Snapshot

| Property | GPT-5.6 Sol | GPT-6.1 Terra |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1.05M |
| Independent public score (not head-to-head) | 75.14 | 75.87 |
| Benchmarks Covered | 43 | 10 |
| Pricing (input/output) | $4.00 / $20.00 | $1.00 / $5.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.6 Sol public-lane score: 68.5 (Supported · #12/133)
- GPT-6.1 Terra public-lane score: 72.4 (Estimated · #8/133)

| Benchmark | GPT-5.6 Sol | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 91.9% | Coming soon | Coming soon |
| BrowseComp | 92.2% | Coming soon | Coming soon |
| OSWorld 2.0 | 62.6% | Coming soon | Coming soon |
| CyberGym | 84.5% | Coming soon | Coming soon |
| ExploitGym | 33.7% | Coming soon | Coming soon |
| Toolathlon | 58% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.8% | Coming soon | Coming soon |
| ApprenticeBench | 26% | Coming soon | Coming soon |
| MazeBench | 13% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 50.30% | Coming soon |
| Terminal-Bench-Science 0.1 | Coming soon | 58.3% | Coming soon |
| Agents' Last Exam | Coming soon | 60.0% | Coming soon |
| OSWorld 2.1 Offline | Coming soon | 74.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.6 Sol public-lane score: 67.4 (Supported · #11/154)
- GPT-6.1 Terra public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 42.0 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 64.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 91.9% | Coming soon | Coming soon |
| DeepSWE | 72.7% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | 60.6% | Coming soon | Coming soon |
| FrontierSWE v2 | 32.2% | Coming soon | Coming soon |
| CursorBench 3.2 | 67.2% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| VulcanBench CII v1 | 86.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.6% | Coming soon | Coming soon |
| SWE-bench (Vals) | 96.2% | Coming soon | Coming soon |
| CursorBench 4.0 | 41.7% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 36.2% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.6 Sol public-lane score: 76.4 (#12/26)
- GPT-6.1 Terra public-lane score: 81.8 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.6 Sol | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 92.5% | Coming soon | Coming soon |
| ARC-AGI-3 | 7.8% | Coming soon | Coming soon |
| GeneBench-Pro | 28.7% | Coming soon | Coming soon |
| ARC-AGI-1 | 96.50% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.6 Sol public-lane score: 90.1 (#7/58)
- GPT-6.1 Terra public-lane score: 91.6 (#4/58)

| Benchmark | GPT-5.6 Sol | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| ExtractBench (LlamaIndex) | 93.77% | Coming soon | Coming soon |
| ParseBench | 74.46% | Coming soon | Coming soon |
| MMMU-Pro | 83% | 85.5% | GPT-6.1 Terra |
| MMMU-Pro w/ Python | 84.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.6 Sol public-lane score: 76.3 (Supported · #11/188)
- GPT-6.1 Terra public-lane score: 74.9 (Supported · #12/188)

| Benchmark | GPT-5.6 Sol | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 94.6% | Coming soon | Coming soon |
| GPQA-D | 94.6% | Coming soon | Coming soon |
| HLE-Verified | 54.5% | Coming soon | Coming soon |
| LABBench2 | 82.1% | Coming soon | Coming soon |
| HealthBench Professional | 60.5% | 62.7% | GPT-6.1 Terra |
| HealthBench Hard | 33.1% | 31.4% | GPT-5.6 Sol |
| GPQA Diamond (Vals) | 95.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.1% | Coming soon | Coming soon |
| HealthBench (raw) | Coming soon | 51.1% | Coming soon |
| HealthBench (length-adjusted) | Coming soon | 55.1% | Coming soon |
| HealthBench Professional (raw) | Coming soon | 64.2% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.6 Sol public-lane score: 89.1 (#34/155)
- GPT-6.1 Terra public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 27.0% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.6 Sol public-lane score: 95.8 (Unranked · 3 rankable rows)
- GPT-6.1 Terra public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 89% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 89.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 83.000% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.6 Sol and GPT-6.1 Terra?

Not yet. The models share only 3 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [GPT-5.6 Sol vs GPT-5.6 Terra](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)
- [GPT-6.1 Terra vs GPT-5.6 Terra](/compare/gpt-5-6-terra-vs-gpt-6-1-terra)
- [GPT-5.6 Sol vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-sol)
- [GPT-6.1 Terra vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-6-1-terra)

## Explore More

- [GPT-5.6 Sol profile](/models/gpt-5-6-sol)
- [GPT-6.1 Terra profile](/models/gpt-6-1-terra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)