# Granite 4.2 8B vs Spark-X2.6-4B

> Side-by-side benchmark comparison for Granite 4.2 8B and Spark-X2.6-4B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/granite-4-2-8b-vs-spark-x2-6-4b
- Last updated: October 20, 2026

- Shared sourced benchmarks: 8
- 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 40.14 to 32.86. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 15.9 for Granite 4.2 8B and 33 for Spark-X2.6-4B.
- The biggest single benchmark swing is SWE-bench Pro in Coding, with scores of 19.1% and 54.3%.
- Spark-X2.6-4B also has the larger context window at 1M.

## Model Snapshot

| Property | Granite 4.2 8B | Spark-X2.6-4B |
|----------|----------|----------|
| Creator | IBM | SparkLLM |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 1M |
| Overall Score | 32.86 | 40.14 |
| Benchmarks Covered | 14 | 20 |
| Pricing (input/output) | $0.00 / $0.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Granite 4.2 8B public-lane score: 15.9 (Estimated · #116/131)
- Spark-X2.6-4B public-lane score: 33 (Estimated · #89/131)

| Benchmark | Granite 4.2 8B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 20.6% | Coming soon | Coming soon |
| τ³-bench results | 58.1% | 34.7% | Granite 4.2 8B |
| BFCL v4 | 52.4% | 71.8% | Spark-X2.6-4B |
| τ²-bench results | Coming soon | 86.9% | Coming soon |
| MCP Atlas | Coming soon | 62.4% | Coming soon |
| BrowseComp | Coming soon | 53.1% | Coming soon |
| HLE w/ tools | Coming soon | 36.9% | Coming soon |
| Claw-Eval | Coming soon | 69.9% | Coming soon |

### Coding

- Winner: Directional only
- Granite 4.2 8B public-lane score: 17.2 (Estimated · #127/152)
- Spark-X2.6-4B public-lane score: 30.6 (Estimated · #95/152)

| Benchmark | Granite 4.2 8B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 47.7% | 62.8% | Spark-X2.6-4B |
| SWE-bench Pro | 19.1% | 54.3% | Spark-X2.6-4B |
| SWE Multilingual | 30.8% | 64.7% | Spark-X2.6-4B |
| Terminal-Bench 2.1 | 20.6% | Coming soon | Coming soon |
| LiveCodeBench v6 | 73.2% | Coming soon | Coming soon |
| SciCode | 36.1% | 36.8% | Spark-X2.6-4B |

### Reasoning

- Winner: Not comparable
- Granite 4.2 8B public-lane score: 55.9 (Unranked · 2 rankable rows)
- Spark-X2.6-4B public-lane score: 48.8 (Unranked · 2 rankable rows)

| Benchmark | Granite 4.2 8B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | Coming soon | 53.3% | Coming soon |

### Knowledge

- Winner: Directional only
- Granite 4.2 8B public-lane score: 30.4 (Supported · #157/187)
- Spark-X2.6-4B public-lane score: 43 (Estimated · #109/187)

| Benchmark | Granite 4.2 8B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 64.1% | 69.9% | Spark-X2.6-4B |
| MMLU-Pro | 74.0% | Coming soon | Coming soon |
| GPQA-D | Coming soon | 77.1% | Coming soon |
| HLE w/o tools | Coming soon | 17.9% | Coming soon |

### Instruction Following

- Winner: Granite 4.2 8B
- Granite 4.2 8B public-lane score: 86.5 (#42/149)
- Spark-X2.6-4B public-lane score: 78.2 (#62/149)

| Benchmark | Granite 4.2 8B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 79.3% | 75.8% | Granite 4.2 8B |
| IFEval | Coming soon | 93.6% | Coming soon |

### Mathematics

- Winner: Not comparable
- Granite 4.2 8B public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 76.4 (Unranked · 3 rankable rows)

| Benchmark | Granite 4.2 8B | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 86.7% | Coming soon | Coming soon |
| HMMT Feb 2025 | 78.3% | Coming soon | Coming soon |
| 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, Granite 4.2 8B 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 Granite 4.2 8B and Spark-X2.6-4B?

The widest category gap is in agentic, where the averages are 15.9 for Granite 4.2 8B and 33 for Spark-X2.6-4B.

### How many benchmarks does Granite 4.2 8B cover on BenchLM?

Granite 4.2 8B currently has 14 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

- [Granite 4.2 8B vs Granite 4.2 30B](/compare/granite-4-2-30b-vs-granite-4-2-8b)
- [Spark-X2.6-4B vs Granite 4.2 30B](/compare/granite-4-2-30b-vs-spark-x2-6-4b)
- [Granite 4.2 8B vs Granite 4.2 3B](/compare/granite-4-2-3b-vs-granite-4-2-8b)
- [Spark-X2.6-4B vs Granite 4.2 3B](/compare/granite-4-2-3b-vs-spark-x2-6-4b)

## Explore More

- [Granite 4.2 8B profile](/models/granite-4-2-8b)
- [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)