# GPT-5.6 Terra vs Kimi K3

> Side-by-side benchmark comparison for GPT-5.6 Terra and Kimi K3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-6-terra-vs-kimi-k3
- Last updated: October 2, 2026

- Shared sourced benchmarks: 16
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick GPT-5.6 Terra if you want the stronger benchmark profile. Kimi K3 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 73.21 to 72.14.
- The clearest category separation is in multimodal & grounded, where the averages are 78.2 for GPT-5.6 Terra and 89.4 for Kimi K3.
- The biggest single benchmark swing is ARC-AGI-2 in Reasoning, with scores of 83.9% and 60.4%.
- GPT-5.6 Terra is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | GPT-5.6 Terra | Kimi K3 |
|----------|----------|----------|
| Creator | OpenAI | Moonshot AI |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1.05M |
| Overall Score | 73.21 | 72.14 |
| Benchmarks Covered | 33 | 48 |
| Pricing (input/output) | $2.00 / $12.00 | $3.00 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Kimi K3
- GPT-5.6 Terra public-lane score: 59.2 (Supported · #24/119)
- Kimi K3 public-lane score: 68.1 (Supported · #8/119)

| Benchmark | GPT-5.6 Terra | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 20.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 87.4% | 88.3% | Kimi K3 |
| BrowseComp | 87.5% | 91.2% | Kimi K3 |
| OSWorld 2.0 | 50.2% | Coming soon | Coming soon |
| CyberGym | 81.8% | Coming soon | Coming soon |
| ExploitGym | 23.2% | Coming soon | Coming soon |
| Toolathlon | 53.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 77.5% | 80.9% | Kimi K3 |
| ApprenticeBench | 16% | 18% | Kimi K3 |
| DeepSearchQA | Coming soon | 95.0% | Coming soon |
| Toolathlon-Verified | Coming soon | 73.2% | Coming soon |
| MCP Atlas | Coming soon | 84.2% | Coming soon |
| AutomationBench | Coming soon | 30.8% | Coming soon |
| JobBench | Coming soon | 52.9% | Coming soon |
| APEX-Agents | Coming soon | 37.6% | Coming soon |
| SpreadsheetBench 2 | Coming soon | 34.8% | Coming soon |
| DECK-Bench | Coming soon | 73.5% | Coming soon |

### Coding

- Winner: GPT-5.6 Terra
- GPT-5.6 Terra public-lane score: 64.3 (Supported · #10/144)
- Kimi K3 public-lane score: 61.4 (Supported · #18/144)

| Benchmark | GPT-5.6 Terra | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 63.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 87.4% | Coming soon | Coming soon |
| DeepSWE | 69.6% | 67.5% | GPT-5.6 Terra |
| FrontierCode 1.1 Extended | 55.8% | Coming soon | Coming soon |
| CursorBench 3.2 | 64.9% | 60.8% | GPT-5.6 Terra |
| VulcanBench v3 | 87.0% | 73.7% | GPT-5.6 Terra |
| LiveCodeBench (Vals) | 85.9% | 87.2% | Kimi K3 |
| SWE-bench (Vals) | 95.4% | 93.4% | GPT-5.6 Terra |
| CursorBench 4.0 | 41.3% | Coming soon | Coming soon |
| FrontierSWE | Coming soon | 81.2% | Coming soon |
| ProgramBench | Coming soon | 77.8% | Coming soon |
| Kimi Code Bench v2 | Coming soon | 72.9% | Coming soon |
| sweMarathon | Coming soon | 42% | Coming soon |
| PostTrain Bench | Coming soon | 36.6% | Coming soon |
| MLS-Bench Lite | Coming soon | 48.3% | Coming soon |
| OpenHarmony Bench | Coming soon | 57.3% | Coming soon |
| FrontierSWE v2 | Coming soon | 25.9% | Coming soon |
| PostTrainBench v1.1 | Coming soon | 32.0% | Coming soon |

### Reasoning

- Winner: Directional only
- GPT-5.6 Terra public-lane score: 65.5 (#19/27)
- Kimi K3 public-lane score: 65.8 (#18/27)

| Benchmark | GPT-5.6 Terra | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 83.9% | 60.4% | GPT-5.6 Terra |
| ARC-AGI-3 | 0.8% | Coming soon | Coming soon |
| ARC-AGI-1 | Coming soon | 94.50% | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- GPT-5.6 Terra public-lane score: 78.2 (#16/49)
- Kimi K3 public-lane score: 89.4 (#1/49)

| Benchmark | GPT-5.6 Terra | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 80.7% | 81.6% | Kimi K3 |
| MMMU-Pro w/ Python | 82% | 83.4% | Kimi K3 |
| OfficeQA Pro | Coming soon | 63.3% | Coming soon |
| CharXiv w/o tools | Coming soon | 84.8% | Coming soon |
| CharXiv | Coming soon | 91.3% | Coming soon |
| MathVision | Coming soon | 94.3% | Coming soon |
| MathVision w/ Python | Coming soon | 97.8% | Coming soon |
| BabyVision w/ Python | Coming soon | 85.7% | Coming soon |
| ZeroBench | Coming soon | 23.0% | Coming soon |
| ZeroBench w/ Python | Coming soon | 41.0% | Coming soon |
| WorldVQA ForceAnswer | Coming soon | 51.0% | Coming soon |
| OmniDocBench | Coming soon | 91.1% | Coming soon |
| PerceptionBench | Coming soon | 58.5% | Coming soon |

### Knowledge

- Winner: GPT-5.6 Terra
- GPT-5.6 Terra public-lane score: 70.6 (Supported · #12/171)
- Kimi K3 public-lane score: 67.9 (Supported · #18/171)

| Benchmark | GPT-5.6 Terra | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.9% | 93.5% | Kimi K3 |
| GPQA-D | 92.9% | 93.5% | Kimi K3 |
| 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% | 92.9% | Kimi K3 |
| MMLU-Pro (Vals) | 86.7% | 88.0% | Kimi K3 |
| HLE | Coming soon | 56% | Coming soon |
| HLE w/o tools | Coming soon | 43.5% | Coming soon |

### Instruction Following

- Winner: Not comparable
- GPT-5.6 Terra public-lane score: 85.7 (#35/125)
- Kimi K3 public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 52.7% | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-5.6 Terra public-lane score: 96.8 (Unranked · 3 rankable rows)
- Kimi K3 public-lane score: Coming soon

| Benchmark | GPT-5.6 Terra | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 84.9% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 84.900% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 68.300% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.6 Terra or Kimi K3?

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

### Where is the biggest gap between GPT-5.6 Terra and Kimi K3?

The widest category gap is in multimodal & grounded, where the averages are 78.2 for GPT-5.6 Terra and 89.4 for Kimi K3.

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

GPT-5.6 Terra currently has 33 sourced benchmark scores on BenchLM.

### How many benchmarks does Kimi K3 cover on BenchLM?

Kimi K3 currently has 48 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 K3 vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-kimi-k3)
- [GPT-5.6 Terra vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-terra)
- [Kimi K3 vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-kimi-k3)

## Explore More

- [GPT-5.6 Terra profile](/models/gpt-5-6-terra)
- [Kimi K3 profile](/models/kimi-k3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)