# Spark-X2.6-4B vs Ternary Bonsai 2 27B

> Side-by-side benchmark comparison for Spark-X2.6-4B and Ternary Bonsai 2 27B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/spark-x2-6-4b-vs-ternary-bonsai-2-27b
- Last updated: October 20, 2026

- Shared sourced benchmarks: 7
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Ternary Bonsai 2 27B leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Ternary Bonsai 2 27B has the higher overall point estimate 53.93 to 40.14. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in reasoning, where the averages are 48.8 for Spark-X2.6-4B and 77.9 for Ternary Bonsai 2 27B.
- The biggest single benchmark swing is GPQA in Knowledge, with scores of 69.9% and 85.8%.
- Spark-X2.6-4B also has the larger context window at 1M.

## Model Snapshot

| Property | Spark-X2.6-4B | Ternary Bonsai 2 27B |
|----------|----------|----------|
| Creator | SparkLLM | Prism ML |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 262K |
| Overall Score | 40.14 | 53.93 |
| Benchmarks Covered | 20 | 21 |
| Pricing (input/output) | $0.00 / $0.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Spark-X2.6-4B public-lane score: 33 (Estimated · #89/131)
- Ternary Bonsai 2 27B public-lane score: Coming soon

| Benchmark | Spark-X2.6-4B | Ternary Bonsai 2 27B | Winner |
|-----------|-----------|-----------|--------|
| BFCL v4 | 71.8% | Coming soon | Coming soon |
| τ²-bench results | 86.9% | 80.2% | Spark-X2.6-4B |
| MCP Atlas | 62.4% | Coming soon | Coming soon |
| BrowseComp | 53.1% | Coming soon | Coming soon |
| HLE w/ tools | 36.9% | Coming soon | Coming soon |
| τ³-bench results | 34.7% | Coming soon | Coming soon |
| Claw-Eval | 69.9% | Coming soon | Coming soon |
| BFCL v3 | Coming soon | 74.9% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 52.8% | Coming soon |

### Coding

- Winner: Not comparable
- Spark-X2.6-4B public-lane score: 30.6 (Estimated · #95/152)
- Ternary Bonsai 2 27B public-lane score: Coming soon

| Benchmark | Spark-X2.6-4B | Ternary Bonsai 2 27B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 54.3% | Coming soon | Coming soon |
| SWE-bench Verified | 62.8% | 60.8% | Spark-X2.6-4B |
| SWE Multilingual | 64.7% | Coming soon | Coming soon |
| SciCode | 36.8% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 90.1% | Coming soon |
| BigCodeBench | Coming soon | 58.1% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 52.8% | Coming soon |

### Reasoning

- Winner: Not comparable
- Spark-X2.6-4B public-lane score: 48.8 (Unranked · 2 rankable rows)
- Ternary Bonsai 2 27B public-lane score: 77.9 (Unranked · 1 rankable row)

| Benchmark | Spark-X2.6-4B | Ternary Bonsai 2 27B | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 53.3% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Spark-X2.6-4B public-lane score: Coming soon
- Ternary Bonsai 2 27B public-lane score: Coming soon

| Benchmark | Spark-X2.6-4B | Ternary Bonsai 2 27B | Winner |
|-----------|-----------|-----------|--------|
| CharXiv (overall) | Coming soon | 80.0% | Coming soon |
| A-OKVQA | Coming soon | 86.8% | Coming soon |
| OmniDocBench 1.6 | Coming soon | 89.1% | Coming soon |
| RealWorldQA | Coming soon | 80.1% | Coming soon |
| OCRBench V2 | Coming soon | 56.9% | Coming soon |

### Knowledge

- Winner: Not comparable
- Spark-X2.6-4B public-lane score: 43 (Estimated · #109/187)
- Ternary Bonsai 2 27B public-lane score: Coming soon

| Benchmark | Spark-X2.6-4B | Ternary Bonsai 2 27B | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 77.1% | 85.8% | Ternary Bonsai 2 27B |
| HLE w/o tools | 17.9% | Coming soon | Coming soon |
| GPQA | 69.9% | 85.8% | Ternary Bonsai 2 27B |
| MMLU-Redux | Coming soon | 89.1% | Coming soon |

### Instruction Following

- Winner: Spark-X2.6-4B
- Spark-X2.6-4B public-lane score: 78.2 (#62/149)
- Ternary Bonsai 2 27B public-lane score: 74 (#70/149)

| Benchmark | Spark-X2.6-4B | Ternary Bonsai 2 27B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 93.6% | 91.3% | Spark-X2.6-4B |
| IFBench | 75.8% | 74% | Spark-X2.6-4B |

### Mathematics

- Winner: Not comparable
- Spark-X2.6-4B public-lane score: 76.4 (Unranked · 3 rankable rows)
- Ternary Bonsai 2 27B public-lane score: 86.2 (Unranked · 4 rankable rows)

| Benchmark | Spark-X2.6-4B | Ternary Bonsai 2 27B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 91.2% | 95.8% | Ternary Bonsai 2 27B |
| HMMT Feb 2026 | 81.3% | Coming soon | Coming soon |
| IMOAnswerBench | 75.2% | Coming soon | Coming soon |
| GSM8K | Coming soon | 96.7% | Coming soon |
| MATH-500 | Coming soon | 98.8% | Coming soon |
| AIME 2025 | Coming soon | 95% | Coming soon |

## FAQ

### Which is better overall, Spark-X2.6-4B or Ternary Bonsai 2 27B?

Ternary Bonsai 2 27B has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Spark-X2.6-4B and Ternary Bonsai 2 27B?

The widest category gap is in reasoning, where the averages are 48.8 for Spark-X2.6-4B and 77.9 for Ternary Bonsai 2 27B.

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

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

### How many benchmarks does Ternary Bonsai 2 27B cover on BenchLM?

Ternary Bonsai 2 27B currently has 21 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Spark-X2.6-4B vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-spark-x2-6-4b)
- [Ternary Bonsai 2 27B vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-ternary-bonsai-2-27b)
- [Spark-X2.6-4B vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-spark-x2-6-4b)
- [Ternary Bonsai 2 27B vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-ternary-bonsai-2-27b)

## Explore More

- [Spark-X2.6-4B profile](/models/spark-x2-6-4b)
- [Ternary Bonsai 2 27B profile](/models/ternary-bonsai-2-27b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)