# LFM3-1.7B vs Spark-X2.6-4B

> Side-by-side benchmark comparison for LFM3-1.7B and Spark-X2.6-4B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/lfm3-1-7b-vs-spark-x2-6-4b
- Last updated: October 27, 2026

- Shared sourced benchmarks: 12
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Spark-X2.6-4B leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Spark-X2.6-4B has the higher overall point estimate 41.05 to 22.99. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 14.4 for LFM3-1.7B and 34.5 for Spark-X2.6-4B.
- The biggest single benchmark swing is SWE Multilingual in Coding, with scores of 23% and 64.7%.
- Spark-X2.6-4B also has the larger context window at 1M.

## Model Snapshot

| Property | LFM3-1.7B | Spark-X2.6-4B |
|----------|----------|----------|
| Creator | LiquidAI | SparkLLM |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 1M |
| Overall Score | 22.99 | 41.05 |
| Benchmarks Covered | 24 | 20 |
| Pricing (input/output) | $0.00 / $0.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- LFM3-1.7B public-lane score: 14.4 (Estimated · #123/134)
- Spark-X2.6-4B public-lane score: 34.5 (Estimated · #88/134)

| Benchmark | LFM3-1.7B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| AutomationBench | 41.3% | Coming soon | Coming soon |
| BFCL v4 | 71.4% | 71.8% | Spark-X2.6-4B |
| τ³-bench results | 68.0% | 34.7% | LFM3-1.7B |
| WebArena-Verified | 38.4% | Coming soon | Coming soon |
| MCP Atlas | 32.6% | 62.4% | Spark-X2.6-4B |
| ToolSandbox | 80.36% | Coming soon | Coming soon |
| Claw-Eval | 68.6% | 69.9% | Spark-X2.6-4B |
| HLE w/ tools | 13.9% | 36.9% | Spark-X2.6-4B |
| Terminal-Bench 2.1 | 12.9% | Coming soon | Coming soon |
| LiveClaw | 45.60% | Coming soon | Coming soon |
| τ²-bench results | Coming soon | 86.9% | Coming soon |
| BrowseComp | Coming soon | 53.1% | Coming soon |

### Coding

- Winner: Directional only
- LFM3-1.7B public-lane score: 13 (Estimated · #142/155)
- Spark-X2.6-4B public-lane score: 31.7 (Estimated · #96/155)

| Benchmark | LFM3-1.7B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| SciCode | 28.5% | 36.8% | Spark-X2.6-4B |
| SWE-bench Verified | 43.4% | 62.8% | Spark-X2.6-4B |
| SWE Multilingual | 23% | 64.7% | Spark-X2.6-4B |
| Terminal-Bench 2.1 | 12.9% | Coming soon | Coming soon |
| LiveCodeBench v6 | 73.5% | Coming soon | Coming soon |
| LiveCodeBench Pro | 31.7% | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 54.3% | Coming soon |

### Reasoning

- Winner: Not comparable
- LFM3-1.7B public-lane score: 61.3 (Unranked · 1 rankable row)
- Spark-X2.6-4B public-lane score: 48.8 (Unranked · 2 rankable rows)

| Benchmark | LFM3-1.7B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| RULER (128K) | 65.56% | Coming soon | Coming soon |
| LongBench v2 | Coming soon | 53.3% | Coming soon |

### Knowledge

- Winner: Directional only
- LFM3-1.7B public-lane score: 25.5 (Estimated · #175/189)
- Spark-X2.6-4B public-lane score: 43.5 (Estimated · #108/189)

| Benchmark | LFM3-1.7B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 63.4% | 69.9% | Spark-X2.6-4B |
| GPQA-D | 63.4% | 77.1% | Spark-X2.6-4B |
| HLE | 7.2% | Coming soon | Coming soon |
| HLE w/o tools | Coming soon | 17.9% | Coming soon |

### Instruction Following

- Winner: Spark-X2.6-4B
- LFM3-1.7B public-lane score: 71.7 (#76/156)
- Spark-X2.6-4B public-lane score: 78.2 (#66/156)

| Benchmark | LFM3-1.7B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 96.7% | 93.6% | LFM3-1.7B |
| IFBench | 73.0% | 75.8% | Spark-X2.6-4B |
| Multi-IF | 89.10% | Coming soon | Coming soon |
| IFStruct | 93.72% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- LFM3-1.7B public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 76.4 (Unranked · 3 rankable rows)

| Benchmark | LFM3-1.7B | 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, LFM3-1.7B or Spark-X2.6-4B?

Spark-X2.6-4B has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between LFM3-1.7B and Spark-X2.6-4B?

The widest category gap is in agentic, where the averages are 14.4 for LFM3-1.7B and 34.5 for Spark-X2.6-4B.

### How many benchmarks does LFM3-1.7B cover on BenchLM?

LFM3-1.7B currently has 24 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

- [LFM3-1.7B vs LFM3-1.7B-Base](/compare/lfm3-1-7b-vs-lfm3-1-7b-base)
- [Spark-X2.6-4B vs LFM3-1.7B-Base](/compare/lfm3-1-7b-base-vs-spark-x2-6-4b)
- [LFM3-1.7B vs LFM3-Audio-2B](/compare/lfm3-1-7b-vs-lfm3-audio-2b)
- [Spark-X2.6-4B vs LFM3-Audio-2B](/compare/lfm3-audio-2b-vs-spark-x2-6-4b)

## Explore More

- [LFM3-1.7B profile](/models/lfm3-1-7b)
- [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)