# GPT-5.6 Terra vs Kimi K2.6

> Side-by-side benchmark comparison for GPT-5.6 Terra and Kimi K2.6 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

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

- Shared sourced benchmarks: 15
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick GPT-5.6 Terra if you want the stronger benchmark profile. Kimi K2.6 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 59.12.
- The clearest category separation is in mathematics, where the averages are 96.8 for GPT-5.6 Terra and 71 for Kimi K2.6.
- The biggest single benchmark swing is FrontierMath v2 (Tier 4) in Mathematics, with scores of 68.300% and 14.580%.
- Kimi K2.6 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-5.6 Terra | Kimi K2.6 |
|----------|----------|----------|
| Creator | OpenAI | Moonshot AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 256K |
| Overall Score | 72.58 | 59.12 |
| Benchmarks Covered | 32 | 37 |
| Pricing (input/output) | $2.00 / $12.00 | $0.95 / $4.00 |

## Category Breakdown

### Agentic

- Winner: GPT-5.6 Terra
- GPT-5.6 Terra public-lane score: 59.5 (Supported · #18/105)
- Kimi K2.6 public-lane score: 43.6 (Supported · #41/105)

| Benchmark | GPT-5.6 Terra | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 20.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 87.4% | Coming soon | Coming soon |
| BrowseComp | 87.5% | 83.2% | GPT-5.6 Terra |
| OSWorld 2.0 | 50.2% | 4.6% | GPT-5.6 Terra |
| CyberGym | 81.8% | Coming soon | Coming soon |
| ExploitGym | 23.2% | Coming soon | Coming soon |
| Toolathlon | 53.1% | 50% | GPT-5.6 Terra |
| Terminal-Bench 2.1 (Vals) | 77.5% | 53.6% | GPT-5.6 Terra |
| ApprenticeBench | 16% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 66.7% | Coming soon |
| OSWorld-Verified | Coming soon | 73.1% | Coming soon |
| MCP Atlas | Coming soon | 55.9% | Coming soon |
| Claw-Eval | Coming soon | 62.3% | Coming soon |
| DeepSearchQA | Coming soon | 92.5% | Coming soon |
| WideResearch | Coming soon | 80.8% | Coming soon |
| Gert Labs | Coming soon | 56.82% | Coming soon |
| ResearchClawBench | Coming soon | 18.0% | Coming soon |

### Coding

- Winner: GPT-5.6 Terra
- GPT-5.6 Terra public-lane score: 64.7 (Supported · #8/135)
- Kimi K2.6 public-lane score: 47.4 (Supported · #42/135)

| Benchmark | GPT-5.6 Terra | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 63.4% | 58.6% | GPT-5.6 Terra |
| Terminal-Bench 2.1 | 87.4% | Coming soon | Coming soon |
| DeepSWE | 69.6% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | 55.8% | Coming soon | Coming soon |
| cursorBench32 | 64.9% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.9% | 86.8% | Kimi K2.6 |
| SWE-bench (Vals) | 95.4% | 76.2% | GPT-5.6 Terra |
| SWE-bench Verified | Coming soon | 80.2% | Coming soon |
| LiveCodeBench v6 | Coming soon | 89.6% | Coming soon |
| SWE Multilingual | Coming soon | 76.7% | Coming soon |
| SciCode | Coming soon | 52.2% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 66.7% | Coming soon |
| Vibe Code Bench | Coming soon | 37.89% | Coming soon |
| cursorBench31 | Coming soon | 47.6% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.6 Terra public-lane score: 65.4 (#12/19)
- Kimi K2.6 public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 83.9% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.8% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- GPT-5.6 Terra public-lane score: 77.2 (#16/50)
- Kimi K2.6 public-lane score: 63.9 (#27/50)

| Benchmark | GPT-5.6 Terra | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 80.7% | 79.4% | GPT-5.6 Terra |
| MMMU-Pro w/ Python | 82% | 80.1% | GPT-5.6 Terra |
| CharXiv | Coming soon | 80.4% | Coming soon |
| MathVision | Coming soon | 87.4% | Coming soon |
| V* | Coming soon | 96.9% | Coming soon |

### Knowledge

- Winner: GPT-5.6 Terra
- GPT-5.6 Terra public-lane score: 71.1 (Supported · #9/158)
- Kimi K2.6 public-lane score: 59 (Supported · #35/158)

| Benchmark | GPT-5.6 Terra | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.9% | 90.5% | GPT-5.6 Terra |
| GPQA-D | 92.9% | 90.5% | GPT-5.6 Terra |
| HLE-Verified | 51.1% | Coming soon | Coming soon |
| LABBench2 | 81.2% | Coming soon | Coming soon |
| HealthBench Professional | 57.7% | Coming soon | Coming soon |
| HealthBench Hard | 32.7% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 90.9% | 89.1% | GPT-5.6 Terra |
| MMLU-Pro (Vals) | 86.7% | 87.6% | Kimi K2.6 |
| HLE | Coming soon | 34.7% | Coming soon |

### Instruction Following

- Winner: Not comparable
- GPT-5.6 Terra public-lane score: 85.7 (#35/124)
- Kimi K2.6 public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- GPT-5.6 Terra public-lane score: 96.8 (Unranked · 3 rankable rows)
- Kimi K2.6 public-lane score: 71 (#1/7)

| Benchmark | GPT-5.6 Terra | Kimi K2.6 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 84.9% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 84.900% | 38.966% | GPT-5.6 Terra |
| FrontierMath v2 (Tier 4) | 68.300% | 14.580% | GPT-5.6 Terra |
| AIME26 | Coming soon | 96.4% | Coming soon |
| HMMT Feb 2026 | Coming soon | 92.7% | Coming soon |
| MMAnswerBench | Coming soon | 86.0% | Coming soon |

## FAQ

### Which is better overall, GPT-5.6 Terra or Kimi K2.6?

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

### Where is the biggest gap between GPT-5.6 Terra and Kimi K2.6?

The widest category gap is in mathematics, where the averages are 96.8 for GPT-5.6 Terra and 71 for Kimi K2.6.

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

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

### How many benchmarks does Kimi K2.6 cover on BenchLM?

Kimi K2.6 currently has 37 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.6 Terra vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)
- [Kimi K2.6 vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-kimi-2-6)
- [GPT-5.6 Terra vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-terra)
- [Kimi K2.6 vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-kimi-2-6)

## Explore More

- [GPT-5.6 Terra profile](/models/gpt-5-6-terra)
- [Kimi K2.6 profile](/models/kimi-2-6)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)