# GPT-6.1 Terra vs Hy4 preview

> Side-by-side benchmark comparison for GPT-6.1 Terra and Hy4 preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-6-1-terra-vs-hy4-preview
- Last updated: October 26, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-6.1 Terra and Hy4 preview share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Hy4 preview has the lower published output-token price.
- GPT-6.1 Terra has the larger published context window at 1.05M.

## Model Snapshot

| Property | GPT-6.1 Terra | Hy4 preview |
|----------|----------|----------|
| Creator | OpenAI | Tencent |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Independent public score (not head-to-head) | 75.87 | 61.22 |
| Benchmarks Covered | 10 | 33 |
| Pricing (input/output) | $1.00 / $5.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 72.4 (Estimated · #8/133)
- Hy4 preview public-lane score: 55.9 (Estimated · #43/133)

| Benchmark | GPT-6.1 Terra | Hy4 preview | 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% | 22.8% | GPT-6.1 Terra |
| OSWorld 2.1 Offline | 74.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 85.4% | Coming soon |
| CyberGym | Coming soon | 78.4% | Coming soon |
| WideResearch | Coming soon | 83.9% | Coming soon |
| DRACO | Coming soon | 77.2% | Coming soon |
| MCP Atlas | Coming soon | 83.7% | Coming soon |
| Toolathlon-Verified | Coming soon | 74.1% | Coming soon |
| APEX-Agents | Coming soon | 37.1% | Coming soon |
| skillsBench | Coming soon | 62.9% | Coming soon |
| JobBench | Coming soon | 61.7% | Coming soon |
| AutomationBench | Coming soon | 32.1% | Coming soon |
| BankerToolBench | Coming soon | 78.6% | Coming soon |
| HLE w/ tools | Coming soon | 55.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 55.1% | Coming soon |
| CWE-bench v1 | Coming soon | 53.0% | Coming soon |
| Hermes Index | Coming soon | 26.1% | Coming soon |
| Hermes Bench | Coming soon | 58.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: Coming soon
- Hy4 preview public-lane score: 57.2 (Supported · #28/154)

| Benchmark | GPT-6.1 Terra | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | Coming soon | 85.4% | Coming soon |
| SWE-bench Pro | Coming soon | 65.7% | Coming soon |
| SWE Multilingual | Coming soon | 82.9% | Coming soon |
| DeepSWE | Coming soon | 64.3% | Coming soon |
| NL2Repo | Coming soon | 58.9% | Coming soon |
| ProgramBench | Coming soon | 17.5% | Coming soon |
| PostTrain Bench | Coming soon | 35.6% | Coming soon |
| sweMarathon | Coming soon | 31.9% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 81.8 (Unranked · 2 rankable rows)
- Hy4 preview public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| STEMBench | Coming soon | 2.59 | Coming soon |
| CritPt | Coming soon | 16.9% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 91.6 (#4/58)
- Hy4 preview public-lane score: 86.7 (Unranked · 1 rankable row)

| Benchmark | GPT-6.1 Terra | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 85.5% | Coming soon | Coming soon |
| OfficeQA Pro | Coming soon | 66.2% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 74.9 (Supported · #12/188)
- Hy4 preview public-lane score: 63.5 (Estimated · #42/188)

| Benchmark | GPT-6.1 Terra | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 51.1% | Coming soon | Coming soon |
| HealthBench (length-adjusted) | 55.1% | Coming soon | Coming soon |
| HealthBench Professional | 62.7% | Coming soon | Coming soon |
| HealthBench Professional (raw) | 64.2% | Coming soon | Coming soon |
| HealthBench Hard | 31.4% | Coming soon | Coming soon |
| GPQA | Coming soon | 92.3% | Coming soon |
| GPQA-D | Coming soon | 92.3% | Coming soon |
| HLE | Coming soon | 55.4% | Coming soon |
| HLE w/o tools | Coming soon | 43.4% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: Coming soon
- Hy4 preview public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Apex | Coming soon | 74.2% | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-6.1 Terra and Hy4 preview?

Not yet. The models share only 1 sourced benchmark row, 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-6.1 Terra vs GPT-6 Astra](/compare/gpt-6-1-terra-vs-gpt-6-astra)
- [Hy4 preview vs GPT-6 Astra](/compare/gpt-6-astra-vs-hy4-preview)
- [GPT-6.1 Terra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-1-terra)
- [Hy4 preview vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-hy4-preview)

## Explore More

- [GPT-6.1 Terra profile](/models/gpt-6-1-terra)
- [Hy4 preview profile](/models/hy4-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)