# GPT-5.2 vs GPT-5.6 Terra

> Side-by-side benchmark comparison for GPT-5.2 and GPT-5.6 Terra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-2-vs-gpt-5-6-terra
- Last updated: September 24, 2026

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

## Quick Verdict

Pick GPT-5.6 Terra if you want the stronger benchmark profile. GPT-5.2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.6 Terra leads overall 72.58 to 61.37.
- The clearest category separation is in mathematics, where the averages are 57.4 for GPT-5.2 and 96.8 for GPT-5.6 Terra.
- The biggest single benchmark swing is FrontierMath v2 (Tier 4) in Mathematics, with scores of 18.800% and 68.300%.
- GPT-5.6 Terra is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.6 Terra also has the larger context window at 1.05M.

## Model Snapshot

| Property | GPT-5.2 | GPT-5.6 Terra |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1.05M |
| Overall Score | 61.37 | 72.58 |
| Benchmarks Covered | 15 | 32 |
| Pricing (input/output) | $1.75 / $14.00 | $2.00 / $12.00 |

## Category Breakdown

### Agentic

- Winner: GPT-5.6 Terra
- GPT-5.2 public-lane score: 42.6 (Supported · #42/105)
- GPT-5.6 Terra public-lane score: 59.5 (Supported · #18/105)

| Benchmark | GPT-5.2 | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| BrowseComp | 65.8% | 87.5% | GPT-5.6 Terra |
| OSWorld-Verified | 47.3% | Coming soon | Coming soon |
| Gert Labs | 46.54% | Coming soon | Coming soon |
| JobBench | 34.3% | Coming soon | Coming soon |
| Terminal-Bench 3.0 | Coming soon | 20.8% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 87.4% | Coming soon |
| OSWorld 2.0 | Coming soon | 50.2% | Coming soon |
| CyberGym | Coming soon | 81.8% | Coming soon |
| ExploitGym | Coming soon | 23.2% | Coming soon |
| Toolathlon | Coming soon | 53.1% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 77.5% | Coming soon |
| ApprenticeBench | Coming soon | 16% | Coming soon |

### Coding

- Winner: GPT-5.6 Terra
- GPT-5.2 public-lane score: 41 (Supported · #54/135)
- GPT-5.6 Terra public-lane score: 64.7 (Supported · #8/135)

| Benchmark | GPT-5.2 | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80% | Coming soon | Coming soon |
| SWE-bench Pro | 55.6% | 63.4% | GPT-5.6 Terra |
| Vibe Code Bench | 53.50% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 87.4% | Coming soon |
| DeepSWE | Coming soon | 69.6% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 55.8% | Coming soon |
| cursorBench32 | Coming soon | 64.9% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.9% | Coming soon |
| SWE-bench (Vals) | Coming soon | 95.4% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.2 public-lane score: 60.6 (Unranked · 3 rankable rows)
- GPT-5.6 Terra public-lane score: 65.4 (#12/19)

| Benchmark | GPT-5.2 | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 52.9% | 83.9% | GPT-5.6 Terra |
| ARC-AGI-3 | Coming soon | 0.8% | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- GPT-5.2 public-lane score: 66.3 (#23/50)
- GPT-5.6 Terra public-lane score: 77.2 (#16/50)

| Benchmark | GPT-5.2 | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 79.5% | 80.7% | GPT-5.6 Terra |
| MathVision | 83.0% | Coming soon | Coming soon |
| CharXiv | 82.1% | Coming soon | Coming soon |
| V* | 75.9% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 82% | Coming soon |

### Knowledge

- Winner: GPT-5.6 Terra
- GPT-5.2 public-lane score: 57.9 (Supported · #38/158)
- GPT-5.6 Terra public-lane score: 71.1 (Supported · #9/158)

| Benchmark | GPT-5.2 | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.4% | 92.9% | GPT-5.6 Terra |
| GPQA-D | Coming soon | 92.9% | Coming soon |
| HLE-Verified | Coming soon | 51.1% | Coming soon |
| LABBench2 | Coming soon | 81.2% | Coming soon |
| HealthBench Professional | Coming soon | 57.7% | Coming soon |
| HealthBench Hard | Coming soon | 32.7% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 90.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.7% | Coming soon |

### Instruction Following

- Winner: Directional only
- GPT-5.2 public-lane score: 91.2 (#15/124)
- GPT-5.6 Terra public-lane score: 85.7 (#35/124)

### Mathematics

- Winner: Not comparable
- GPT-5.2 public-lane score: 57.4 (Unranked · 2 rankable rows)
- GPT-5.6 Terra public-lane score: 96.8 (Unranked · 3 rankable rows)

| Benchmark | GPT-5.2 | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 40.700% | 84.900% | GPT-5.6 Terra |
| FrontierMath v2 (Tier 4) | 18.800% | 68.300% | GPT-5.6 Terra |
| FrontierMath (legacy) | Coming soon | 84.9% | Coming soon |

## FAQ

### Which is better overall, GPT-5.2 or GPT-5.6 Terra?

GPT-5.6 Terra is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.2 and GPT-5.6 Terra?

The widest category gap is in mathematics, where the averages are 57.4 for GPT-5.2 and 96.8 for GPT-5.6 Terra.

### How many benchmarks does GPT-5.2 cover on BenchLM?

GPT-5.2 currently has 15 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.6 Terra cover on BenchLM?

GPT-5.6 Terra currently has 32 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.2 vs GPT-5.2 Pro](/compare/gpt-5-2-vs-gpt-5-2-pro)
- [GPT-5.6 Terra vs GPT-5.2 Pro](/compare/gpt-5-2-pro-vs-gpt-5-6-terra)
- [GPT-5.2 vs GPT-5.2 Instant](/compare/gpt-5-2-vs-gpt-5-2-instant)
- [GPT-5.6 Terra vs GPT-5.2 Instant](/compare/gpt-5-2-instant-vs-gpt-5-6-terra)

## Explore More

- [GPT-5.2 profile](/models/gpt-5-2)
- [GPT-5.6 Terra profile](/models/gpt-5-6-terra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)