# GPT-5.6 Sol vs Kimi K3

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

- Canonical page: https://benchlm.ai/compare/gpt-5-6-sol-vs-kimi-k3
- Last updated: September 4, 2026

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

## Quick Verdict

Pick GPT-5.6 Sol 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 Sol leads overall 79.64 to 74.87.
- The clearest category separation is in reasoning, where the averages are 69.8 for GPT-5.6 Sol and 78.5 for Kimi K3.
- The biggest single benchmark swing is VulcanBench v3 in Coding, with scores of 87.0% and 73.7%.
- Kimi K3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | GPT-5.6 Sol | Kimi K3 |
|----------|----------|----------|
| Creator | OpenAI | Moonshot AI |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1.05M |
| Overall Score | 79.64 | 74.87 |
| Benchmarks Covered | 35 | 43 |
| Pricing (input/output) | $5.00 / $30.00 | $3.00 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Kimi K3
- GPT-5.6 Sol public-lane score: 70.1 (Supported · #6/151)
- Kimi K3 public-lane score: 71.9 (Supported · #4/151)

| Benchmark | GPT-5.6 Sol | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 91.9% | 88.3% | GPT-5.6 Sol |
| BrowseComp | 92.2% | 91.2% | GPT-5.6 Sol |
| OSWorld 2.0 | 62.6% | Coming soon | Coming soon |
| CyberGym | 84.5% | Coming soon | Coming soon |
| ExploitGym | 33.7% | Coming soon | Coming soon |
| Toolathlon | 58% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.8% | 80.9% | GPT-5.6 Sol |
| 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 Sol
- GPT-5.6 Sol public-lane score: 74.4 (Supported · #5/183)
- Kimi K3 public-lane score: 68 (Supported · #7/183)

| Benchmark | GPT-5.6 Sol | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 42 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 64.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 91.9% | Coming soon | Coming soon |
| deepSwe | 72.7% | 67.5% | GPT-5.6 Sol |
| FrontierCode 1.1 Extended | 60.6% | Coming soon | Coming soon |
| FrontierSWE v2 | 32.2% | 25.9% | GPT-5.6 Sol |
| cursorBench32 | 67.2% | 60.8% | GPT-5.6 Sol |
| VulcanBench v3 | 87.0% | 73.7% | GPT-5.6 Sol |
| VulcanBench CII v1 | 86.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.6% | 87.2% | Kimi K3 |
| SWE-bench (Vals) | 96.2% | 93.4% | GPT-5.6 Sol |
| 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 |

### Multimodal & Grounded

- Winner: Coming soon
- GPT-5.6 Sol public-lane score: 87.5 (#4/48)
- Kimi K3 public-lane score: 89.5 (#1/48)

| Benchmark | GPT-5.6 Sol | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 83% | 81.6% | GPT-5.6 Sol |
| MMMU-Pro w/ Python | 84.6% | 83.4% | GPT-5.6 Sol |
| 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 |

### Reasoning

- Winner: Coming soon
- GPT-5.6 Sol public-lane score: 69.8 (#14/22)
- Kimi K3 public-lane score: 78.5 (#3/22)

| Benchmark | GPT-5.6 Sol | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 92.5% | Coming soon | Coming soon |
| ARC-AGI-3 | 7.8% | Coming soon | Coming soon |
| GeneBench-Pro | 28.7% | Coming soon | Coming soon |

### Knowledge

- Winner: GPT-5.6 Sol
- GPT-5.6 Sol public-lane score: 80.4 (Supported · #5/181)
- Kimi K3 public-lane score: 72.3 (Supported · #8/181)

| Benchmark | GPT-5.6 Sol | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 94.6% | 93.5% | GPT-5.6 Sol |
| GPQA-D | 94.6% | 93.5% | GPT-5.6 Sol |
| HLE-Verified | 54.5% | Coming soon | Coming soon |
| LABBench2 | 82.1% | Coming soon | Coming soon |
| HealthBench Professional | 60.5% | Coming soon | Coming soon |
| HealthBench Hard | 33.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 95.2% | 92.9% | GPT-5.6 Sol |
| MMLU-Pro (Vals) | 89.1% | 88.0% | GPT-5.6 Sol |
| HLE | Coming soon | 56% | Coming soon |
| HLE w/o tools | Coming soon | 43.5% | Coming soon |

### Instruction Following

- Winner: Coming soon
- GPT-5.6 Sol public-lane score: 88.8 (#27/120)
- Kimi K3 public-lane score: Coming soon

### Mathematics

- Winner: Coming soon
- GPT-5.6 Sol public-lane score: 97 (Unranked · 3 rankable rows)
- Kimi K3 public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 89% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 89.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 83.000% | Coming soon | Coming soon |

## FAQ

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

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

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

The widest category gap is in reasoning, where the averages are 69.8 for GPT-5.6 Sol and 78.5 for Kimi K3.

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

GPT-5.6 Sol currently has 35 sourced benchmark scores on BenchLM.

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

Kimi K3 currently has 43 sourced benchmark scores on BenchLM.

## Related Comparisons

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

## Explore More

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