# Kimi K3 vs Spark-X2.6-4B

> Side-by-side benchmark comparison for Kimi K3 and Spark-X2.6-4B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/kimi-k3-vs-spark-x2-6-4b
- Last updated: October 20, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Kimi K3 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Kimi K3 has the higher overall point estimate 69.93 to 40.14. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 69.3 for Kimi K3 and 33 for Spark-X2.6-4B.
- The biggest single benchmark swing is BrowseComp in Agentic, with scores of 91.2% and 53.1%.
- Spark-X2.6-4B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Kimi K3 also has the larger context window at 1.05M.

## Model Snapshot

| Property | Kimi K3 | Spark-X2.6-4B |
|----------|----------|----------|
| Creator | Moonshot AI | SparkLLM |
| Type | Pending | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Overall Score | 69.93 | 40.14 |
| Benchmarks Covered | 53 | 20 |
| Pricing (input/output) | $3.00 / $15.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Kimi K3 public-lane score: 69.3 (Supported · #10/131)
- Spark-X2.6-4B public-lane score: 33 (Estimated · #89/131)

| Benchmark | Kimi K3 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.3% | Coming soon | Coming soon |
| BrowseComp | 91.2% | 53.1% | Kimi K3 |
| DeepSearchQA | 95.0% | Coming soon | Coming soon |
| Toolathlon-Verified | 73.2% | Coming soon | Coming soon |
| MCP Atlas | 84.2% | 62.4% | Kimi K3 |
| AutomationBench | 30.8% | Coming soon | Coming soon |
| JobBench | 52.9% | Coming soon | Coming soon |
| APEX-Agents | 37.6% | Coming soon | Coming soon |
| SpreadsheetBench 2 | 34.8% | Coming soon | Coming soon |
| DECK-Bench | 73.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 80.9% | Coming soon | Coming soon |
| ApprenticeBench | 18% | Coming soon | Coming soon |
| Hermes Index | 39.2% | Coming soon | Coming soon |
| Hermes Bench | 71.5% | Coming soon | Coming soon |
| MazeBench | 1% | Coming soon | Coming soon |
| BFCL v4 | Coming soon | 71.8% | Coming soon |
| τ²-bench results | Coming soon | 86.9% | Coming soon |
| HLE w/ tools | Coming soon | 36.9% | Coming soon |
| τ³-bench results | Coming soon | 34.7% | Coming soon |
| Claw-Eval | Coming soon | 69.9% | Coming soon |

### Coding

- Winner: Directional only
- Kimi K3 public-lane score: 58.9 (Supported · #23/152)
- Spark-X2.6-4B public-lane score: 30.6 (Estimated · #95/152)

| Benchmark | Kimi K3 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 67.5% | Coming soon | Coming soon |
| CursorBench 3.2 | 60.8% | Coming soon | Coming soon |
| FrontierSWE | 81.2% | Coming soon | Coming soon |
| ProgramBench | 77.8% | Coming soon | Coming soon |
| Kimi Code Bench v2 | 72.9% | Coming soon | Coming soon |
| sweMarathon | 42% | Coming soon | Coming soon |
| PostTrain Bench | 36.6% | Coming soon | Coming soon |
| MLS-Bench Lite | 48.3% | Coming soon | Coming soon |
| VulcanBench v3 | 73.7% | Coming soon | Coming soon |
| OpenHarmony Bench | 57.3% | Coming soon | Coming soon |
| FrontierSWE v2 | 25.9% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.2% | Coming soon | Coming soon |
| SWE-bench (Vals) | 93.4% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 32.0% | Coming soon | Coming soon |
| Bug Hunt Bench | 21.0 fixes | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 54.3% | Coming soon |
| SWE-bench Verified | Coming soon | 62.8% | Coming soon |
| SWE Multilingual | Coming soon | 64.7% | Coming soon |
| SciCode | Coming soon | 36.8% | Coming soon |

### Reasoning

- Winner: Not comparable
- Kimi K3 public-lane score: 69.8 (#18/27)
- Spark-X2.6-4B public-lane score: 48.8 (Unranked · 2 rankable rows)

| Benchmark | Kimi K3 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 94.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 60.4% | Coming soon | Coming soon |
| LongBench v2 | Coming soon | 53.3% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Kimi K3 public-lane score: 92.6 (#1/55)
- Spark-X2.6-4B public-lane score: Coming soon

| Benchmark | Kimi K3 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| ExtractBench (LlamaIndex) | 83.17% | Coming soon | Coming soon |
| OfficeQA Pro | 63.3% | Coming soon | Coming soon |
| MMMU-Pro | 81.6% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 83.4% | Coming soon | Coming soon |
| CharXiv w/o tools | 84.8% | Coming soon | Coming soon |
| CharXiv | 91.3% | Coming soon | Coming soon |
| MathVision | 94.3% | Coming soon | Coming soon |
| MathVision w/ Python | 97.8% | Coming soon | Coming soon |
| BabyVision w/ Python | 85.7% | Coming soon | Coming soon |
| ZeroBench | 23.0% | Coming soon | Coming soon |
| ZeroBench w/ Python | 41.0% | Coming soon | Coming soon |
| WorldVQA ForceAnswer | 51.0% | Coming soon | Coming soon |
| OmniDocBench | 91.1% | Coming soon | Coming soon |
| PerceptionBench | 58.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Kimi K3 public-lane score: 68.7 (Supported · #23/187)
- Spark-X2.6-4B public-lane score: 43 (Estimated · #109/187)

| Benchmark | Kimi K3 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.5% | 69.9% | Kimi K3 |
| GPQA-D | 93.5% | 77.1% | Kimi K3 |
| HLE | 56% | Coming soon | Coming soon |
| HLE w/o tools | 43.5% | 17.9% | Kimi K3 |
| GPQA Diamond (Vals) | 92.9% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 88.0% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Kimi K3 public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 78.2 (#62/149)

| Benchmark | Kimi K3 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 52.7% | Coming soon | Coming soon |
| IFEval | Coming soon | 93.6% | Coming soon |
| IFBench | Coming soon | 75.8% | Coming soon |

### Mathematics

- Winner: Not comparable
- Kimi K3 public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 76.4 (Unranked · 3 rankable rows)

| Benchmark | Kimi K3 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 91.2% | Coming soon |
| HMMT Feb 2026 | Coming soon | 81.3% | Coming soon |
| IMOAnswerBench | Coming soon | 75.2% | Coming soon |

## FAQ

### Which is better overall, Kimi K3 or Spark-X2.6-4B?

Kimi K3 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Kimi K3 and Spark-X2.6-4B?

The widest category gap is in agentic, where the averages are 69.3 for Kimi K3 and 33 for Spark-X2.6-4B.

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

Kimi K3 currently has 53 sourced benchmark scores on BenchLM.

### How many benchmarks does Spark-X2.6-4B cover on BenchLM?

Spark-X2.6-4B currently has 20 sourced benchmark scores on BenchLM.

## Related Comparisons

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- [Spark-X2.6-4B vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-spark-x2-6-4b)
- [Kimi K3 vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-kimi-k3)
- [Spark-X2.6-4B vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-spark-x2-6-4b)

## Explore More

- [Kimi K3 profile](/models/kimi-k3)
- [Spark-X2.6-4B profile](/models/spark-x2-6-4b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)