# Claude Opus 4.8 vs Granite 4.2 30B

> Side-by-side benchmark comparison for Claude Opus 4.8 and Granite 4.2 30B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-8-vs-granite-4-2-30b
- Last updated: September 10, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Claude Opus 4.8 if you want the stronger benchmark profile. Granite 4.2 30B only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Opus 4.8 leads overall 72.22 to 50.
- The clearest category separation is in reasoning, where the averages are 55.5 for Claude Opus 4.8 and 54.7 for Granite 4.2 30B.
- The biggest single benchmark swing is SWE Multilingual in Coding, with scores of 84.4% and 41.9%.
- Granite 4.2 30B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Opus 4.8 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Opus 4.8 | Granite 4.2 30B |
|----------|----------|----------|
| Creator | Anthropic | IBM |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 128K |
| Overall Score | 72.22 | null |
| Benchmarks Covered | 38 | 14 |
| Pricing (input/output) | $5.00 / $25.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Claude Opus 4.8 public-lane score: 62.5 (Supported · #14/152)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 21.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 74.6% | Coming soon | Coming soon |
| BrowseComp | 84.3% | Coming soon | Coming soon |
| DeepSearchQA | 93.1% | Coming soon | Coming soon |
| OSWorld-Verified | 83.4% | Coming soon | Coming soon |
| Finance Agent v2 | 53.9% | Coming soon | Coming soon |
| MCP Atlas | 82.2% | Coming soon | Coming soon |
| Toolathlon | 59.9% | Coming soon | Coming soon |
| Gert Labs | 72.97% | Coming soon | Coming soon |
| ResearchClawBench | 21.1% | Coming soon | Coming soon |
| OSWorld 2.0 | 20.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 71.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 29.2% | Coming soon |
| τ³-bench results | Coming soon | 62.0% | Coming soon |
| BFCL v4 | Coming soon | 61.4% | Coming soon |

### Coding

- Winner: Coming soon
- Claude Opus 4.8 public-lane score: 66.4 (Supported · #12/151)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 88.6% | 57% | Claude Opus 4.8 |
| SWE-bench Pro | 69.2% | 33.3% | Claude Opus 4.8 |
| SWE Multilingual | 84.4% | 41.9% | Claude Opus 4.8 |
| SWE Multimodal | 38.4% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 74.6% | Coming soon | Coming soon |
| cursorBench31 | 58.4% | Coming soon | Coming soon |
| cursorBench32 | 62.3% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 46.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.8% | Coming soon | Coming soon |
| SWE-bench (Vals) | 88.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 29.2% | Coming soon |
| LiveCodeBench v6 | Coming soon | 75.8% | Coming soon |
| SciCode | Coming soon | 38.8% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Opus 4.8 public-lane score: 87.8 (#3/48)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 66.2% | Coming soon | Coming soon |
| ScreenSpot Pro | 87.9% | Coming soon | Coming soon |
| CharXiv | 89.9% | Coming soon | Coming soon |
| CharXiv w/o tools | 80.5% | Coming soon | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Opus 4.8 public-lane score: 55.5 (#18/20)
- Granite 4.2 30B public-lane score: 54.7 (Unranked · 2 rankable rows)

| Benchmark | Claude Opus 4.8 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 72.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 1.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- Claude Opus 4.8 public-lane score: 71.4 (Supported · #9/183)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.6% | 66.4% | Claude Opus 4.8 |
| GPQA-D | 93.6% | Coming soon | Coming soon |
| HLE | 57.9% | Coming soon | Coming soon |
| HLE w/o tools | 49.8% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 92.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.6% | Coming soon | Coming soon |
| MMLU-Pro | Coming soon | 77.6% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Claude Opus 4.8 public-lane score: 75.4 (#61/123)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 77.2% | Coming soon |

### Multilingual

- Winner: Coming soon
- Claude Opus 4.8 public-lane score: Coming soon
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| INCLUDE | 87.6% | Coming soon | Coming soon |

### Mathematics

- Winner: Coming soon
- Claude Opus 4.8 public-lane score: 65.4 (#2/7)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | 96.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 47.241% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 31.250% | Coming soon | Coming soon |
| AIME 2025 | Coming soon | 89.2% | Coming soon |
| HMMT Feb 2025 | Coming soon | 89.2% | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.8 or Granite 4.2 30B?

Claude Opus 4.8 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.8 and Granite 4.2 30B?

The widest category gap is in reasoning, where the averages are 55.5 for Claude Opus 4.8 and 54.7 for Granite 4.2 30B.

### How many benchmarks does Claude Opus 4.8 cover on BenchLM?

Claude Opus 4.8 currently has 38 sourced benchmark scores on BenchLM.

### How many benchmarks does Granite 4.2 30B cover on BenchLM?

Granite 4.2 30B currently has 14 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.8 vs Granite 4.2 8B](/compare/claude-opus-4-8-vs-granite-4-2-8b)
- [Granite 4.2 30B vs Granite 4.2 8B](/compare/granite-4-2-30b-vs-granite-4-2-8b)
- [Claude Opus 4.8 vs Granite 4.2 3B](/compare/claude-opus-4-8-vs-granite-4-2-3b)
- [Granite 4.2 30B vs Granite 4.2 3B](/compare/granite-4-2-30b-vs-granite-4-2-3b)

## Explore More

- [Claude Opus 4.8 profile](/models/claude-opus-4-8)
- [Granite 4.2 30B profile](/models/granite-4-2-30b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)