# Claude Opus 4.8 vs SWE-2 Flash

> Side-by-side benchmark comparison for Claude Opus 4.8 and SWE-2 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-8-vs-swe-2-flash
- Last updated: November 5, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Opus 4.8 if you want the stronger benchmark profile. SWE-2 Flash 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 69.69 to 0.
- The biggest single benchmark swing is Terminal-Bench 2.1 in Agentic, with scores of 74.6% and 89.2%.
- SWE-2 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Opus 4.8 | SWE-2 Flash |
|----------|----------|----------|
| Creator | Anthropic | Cognition |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 69.69 | null |
| Benchmarks Covered | 44 | 7 |
| Pricing (input/output) | $5.00 / $25.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 60.6 (Supported · #29/135)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 21.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 74.6% | 89.2% | SWE-2 Flash |
| 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 |
| MazeBench | 0% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 20.00% | Coming soon |

### Coding

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 60.6 (Supported · #18/156)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 88.6% | Coming soon | Coming soon |
| SWE-bench Pro | 69.2% | Coming soon | Coming soon |
| SWE Multilingual | 84.4% | Coming soon | Coming soon |
| SWE Multimodal | 38.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 74.6% | 89.2% | SWE-2 Flash |
| cursorBench31 | 58.4% | Coming soon | Coming soon |
| CursorBench 3.2 | 62.3% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 46.5% | 45.5% | Claude Opus 4.8 |
| LiveCodeBench (Vals) | 87.8% | Coming soon | Coming soon |
| SWE-bench (Vals) | 88.6% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 32.9% | Coming soon | Coming soon |
| FrontierCode 2.0 | 14.7% | 24.0% | SWE-2 Flash |
| DeepSWE | Coming soon | 60.1% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 50.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 62.8 (#20/26)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 72.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 1.5% | Coming soon | Coming soon |
| ARC-AGI-1 | 92.50% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 88.1 (#9/58)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| ExtractBench (LlamaIndex) | 86.84% | Coming soon | Coming soon |
| ParseBench | 62.27% | Coming soon | Coming soon |
| 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 |

### Knowledge

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 71.1 (Supported · #15/177)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.6% | Coming soon | Coming soon |
| 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 |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: Coming soon
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| INCLUDE | 87.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 75.4 (#70/157)
- SWE-2 Flash public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 84.4 (#1/12)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | 96.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 80.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 56.098% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.8 or SWE-2 Flash?

Claude Opus 4.8 is ahead overall on BenchLM right now.

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

Claude Opus 4.8 currently has 44 sourced benchmark scores on BenchLM.

### How many benchmarks does SWE-2 Flash cover on BenchLM?

SWE-2 Flash currently has 7 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.8 vs SWE-1.7](/compare/claude-opus-4-8-vs-swe-1-7)
- [SWE-2 Flash vs SWE-1.7](/compare/swe-1-7-vs-swe-2-flash)
- [Claude Opus 4.8 vs SWE-2](/compare/claude-opus-4-8-vs-swe-2)
- [SWE-2 Flash vs SWE-2](/compare/swe-2-vs-swe-2-flash)

## Explore More

- [Claude Opus 4.8 profile](/models/claude-opus-4-8)
- [SWE-2 Flash profile](/models/swe-2-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)