# Composer 2 vs Granite 4.2 8B

> Side-by-side benchmark comparison for Composer 2 and Granite 4.2 8B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/composer-2-vs-granite-4-2-8b
- Last updated: September 18, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Composer 2 and Granite 4.2 8B share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Granite 4.2 8B has the lower published output-token price.
- Composer 2 has the larger published context window at 200K.

## Model Snapshot

| Property | Composer 2 | Granite 4.2 8B |
|----------|----------|----------|
| Creator | Cursor | IBM |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 128K |
| Independent public score (not head-to-head) | null | 38.27 |
| Benchmarks Covered | 5 | 14 |
| Pricing (input/output) | $0.50 / $2.50 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: 49.3 (Estimated · #63/154)
- Granite 4.2 8B public-lane score: 31.6 (Estimated · #142/154)

| Benchmark | Composer 2 | Granite 4.2 8B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 61.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 20.6% | Coming soon |
| τ³-bench results | Coming soon | 58.1% | Coming soon |
| BFCL v4 | Coming soon | 52.4% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: 49.3 (Estimated · #67/154)
- Granite 4.2 8B public-lane score: 37.1 (Estimated · #130/154)

| Benchmark | Composer 2 | Granite 4.2 8B | Winner |
|-----------|-----------|-----------|--------|
| SWE Multilingual | 73.7% | 30.8% | Composer 2 |
| SWE-Rebench | 58% | Coming soon | Coming soon |
| React Native Evals | 96.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 61.7% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 47.7% | Coming soon |
| SWE-bench Pro | Coming soon | 19.1% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 20.6% | Coming soon |
| LiveCodeBench v6 | Coming soon | 73.2% | Coming soon |
| SciCode | Coming soon | 36.1% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- Granite 4.2 8B public-lane score: 51.9 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- Granite 4.2 8B public-lane score: 34.6 (Supported · #164/184)

| Benchmark | Composer 2 | Granite 4.2 8B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 64.1% | Coming soon |
| MMLU-Pro | Coming soon | 74.0% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- Granite 4.2 8B public-lane score: 82.8 (#47/124)

| Benchmark | Composer 2 | Granite 4.2 8B | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 79.3% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Composer 2 public-lane score: Coming soon
- Granite 4.2 8B public-lane score: Coming soon

| Benchmark | Composer 2 | Granite 4.2 8B | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | Coming soon | 86.7% | Coming soon |
| HMMT Feb 2025 | Coming soon | 78.3% | Coming soon |

## FAQ

### Is there enough evidence to pick between Composer 2 and Granite 4.2 8B?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Composer 2 vs Composer 2.5](/compare/composer-2-vs-composer-2-5)
- [Granite 4.2 8B vs Composer 2.5](/compare/composer-2-5-vs-granite-4-2-8b)
- [Composer 2 vs Composer 2 Fast](/compare/composer-2-vs-composer-2-fast)
- [Granite 4.2 8B vs Composer 2 Fast](/compare/composer-2-fast-vs-granite-4-2-8b)

## Explore More

- [Composer 2 profile](/models/composer-2)
- [Granite 4.2 8B profile](/models/granite-4-2-8b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)