# GPT-6.1 Terra vs Hy4

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

- Canonical page: https://benchlm.ai/compare/gpt-6-1-terra-vs-hy4
- Last updated: November 4, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

GPT-6.1 Terra leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- GPT-6.1 Terra has the higher overall point estimate 80.46 to 0. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is Terminal-Bench-Science 0.1 in Agentic, with scores of 58.3% and 19.8%.
- Hy4 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-6.1 Terra also has the larger context window at 1.05M.

## Model Snapshot

| Property | GPT-6.1 Terra | Hy4 |
|----------|----------|----------|
| Creator | OpenAI | Tencent |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Overall Score | 80.46 | null |
| Benchmarks Covered | 16 | 15 |
| Pricing (input/output) | $1.00 / $5.00 | $0.834 / $2.501 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: 76.7 (Estimated · #6/135)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 50.30% | 44.40% | GPT-6.1 Terra |
| Terminal-Bench-Science 0.1 | 58.3% | 19.8% | GPT-6.1 Terra |
| Agents' Last Exam | 60.0% | 41.0% | GPT-6.1 Terra |
| OSWorld 2.1 Offline | 74.2% | Coming soon | Coming soon |
| MazeBench | 16% | Coming soon | Coming soon |
| HLE w/ tools | Coming soon | 59.1% | Coming soon |
| APEX-Agents | Coming soon | 75.2% | Coming soon |
| AutomationBench | Coming soon | 56.2% | Coming soon |
| OSWorld 2.1 | Coming soon | 78.9% | Coming soon |

### Coding

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: Coming soon
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | Coming soon | 74.9% | Coming soon |
| sweMarathon | Coming soon | 43.8% | Coming soon |
| ProgramBench | Coming soon | 30.0% | Coming soon |
| FrontierCode 2.0 | Coming soon | 31.0% | Coming soon |
| PostTrainBench v1.2 | Coming soon | 35.2% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: 81.8 (Unranked · 2 rankable rows)
- Hy4 public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: 91.6 (#4/58)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| ParseBench | 73.64% | Coming soon | Coming soon |
| ExtractBench Pro | 27% | Coming soon | Coming soon |
| ExtractBench (LlamaIndex) | 94.28% | Coming soon | Coming soon |
| MMMU-Pro | 85.5% | 78.6% | GPT-6.1 Terra |
| ZeroBench w/ Python | Coming soon | 55.4% | Coming soon |

### Knowledge

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: 77.1 (Supported · #11/179)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Hy4 | 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 |
| HLE | Coming soon | 59.1% | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-6.1 Terra public-lane score: 97.3 (Unranked · 2 rankable rows)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 90.877% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 92.683% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-6.1 Terra or Hy4?

GPT-6.1 Terra has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

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

GPT-6.1 Terra currently has 16 sourced benchmark scores on BenchLM.

### How many benchmarks does Hy4 cover on BenchLM?

Hy4 currently has 15 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-6.1 Terra vs GPT-6 Astra](/compare/gpt-6-1-terra-vs-gpt-6-astra)
- [Hy4 vs GPT-6 Astra](/compare/gpt-6-astra-vs-hy4)
- [GPT-6.1 Terra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-1-terra)
- [Hy4 vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-hy4)

## Explore More

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