# Claude Opus 4.8 vs Gemini 3.7 Flash

> Side-by-side benchmark comparison for Claude Opus 4.8 and Gemini 3.7 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-8-vs-gemini-3-7-flash
- Last updated: September 27, 2026

- Shared sourced benchmarks: 13
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Claude Opus 4.8 if you want the stronger benchmark profile. Gemini 3.7 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 70.46 to 67.66.
- The clearest category separation is in reasoning, where the averages are 59 for Claude Opus 4.8 and 77.8 for Gemini 3.7 Flash.
- The biggest single benchmark swing is OSWorld 2.0 in Agentic, with scores of 20.6% and 47.9%.
- Gemini 3.7 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 | Gemini 3.7 Flash |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 70.46 | 67.66 |
| Benchmarks Covered | 38 | 25 |
| Pricing (input/output) | $5.00 / $25.00 | $0.75 / $3.75 |

## Category Breakdown

### Agentic

- Winner: Claude Opus 4.8
- Claude Opus 4.8 public-lane score: 61.3 (Supported · #13/105)
- Gemini 3.7 Flash public-lane score: 58.6 (Supported · #20/105)

| Benchmark | Claude Opus 4.8 | Gemini 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 21.1% | 14.9% | Claude Opus 4.8 |
| Terminal-Bench 2.1 | 74.6% | 85.8% | Gemini 3.7 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% | 47.9% | Gemini 3.7 Flash |
| Terminal-Bench 2.1 (Vals) | 71.9% | 77.5% | Gemini 3.7 Flash |
| AutomationBench | Coming soon | 30.4% | Coming soon |
| Agents' Last Exam | Coming soon | 26.3% | Coming soon |
| ApprenticeBench | Coming soon | 16% | Coming soon |

### Coding

- Winner: Claude Opus 4.8
- Claude Opus 4.8 public-lane score: 63.3 (Supported · #12/135)
- Gemini 3.7 Flash public-lane score: 60.3 (Supported · #17/135)

| Benchmark | Claude Opus 4.8 | Gemini 3.7 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% | 85.8% | Gemini 3.7 Flash |
| cursorBench31 | 58.4% | Coming soon | Coming soon |
| cursorBench32 | 62.3% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 46.5% | 43.6% | Claude Opus 4.8 |
| LiveCodeBench (Vals) | 87.8% | 88.7% | Gemini 3.7 Flash |
| SWE-bench (Vals) | 88.6% | 80.8% | Claude Opus 4.8 |
| DeepSWE | Coming soon | 65.3% | Coming soon |
| FrontierSWE v2 | Coming soon | 20.3% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 59 (#15/19)
- Gemini 3.7 Flash public-lane score: 77.8 (Unranked · 5 rankable rows)

| Benchmark | Claude Opus 4.8 | Gemini 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 72.1% | 84.6% | Gemini 3.7 Flash |
| ARC-AGI-3 | 1.5% | Coming soon | Coming soon |
| MRCR v2 64K-128K | Coming soon | 97% | Coming soon |
| ARC-AGI-1 | Coming soon | 95.50% | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Claude Opus 4.8 public-lane score: 87.7 (#4/50)
- Gemini 3.7 Flash public-lane score: 82.6 (#10/50)

| Benchmark | Claude Opus 4.8 | Gemini 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 66.2% | Coming soon | Coming soon |
| ScreenSpot Pro | 87.9% | Coming soon | Coming soon |
| CharXiv | 89.9% | 88.7% | Claude Opus 4.8 |
| CharXiv w/o tools | 80.5% | 84.5% | Gemini 3.7 Flash |
| LVBench | Coming soon | 85.4% | Coming soon |

### Knowledge

- Winner: Gemini 3.7 Flash
- Claude Opus 4.8 public-lane score: 70 (Supported · #11/158)
- Gemini 3.7 Flash public-lane score: 71.1 (Supported · #10/158)

| Benchmark | Claude Opus 4.8 | Gemini 3.7 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% | 93.9% | Gemini 3.7 Flash |
| MMLU-Pro (Vals) | 89.6% | 90.1% | Gemini 3.7 Flash |
| HLE-Verified | Coming soon | 53.6% | Coming soon |
| LABBench2 | Coming soon | 82.1% | Coming soon |
| BioMysteryBench (human-solvable) | Coming soon | 87.1% | Coming soon |
| BioMysteryBench (human-difficult) | Coming soon | 43.5% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: Coming soon
- Gemini 3.7 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Gemini 3.7 Flash | Winner |
|-----------|-----------|-----------|--------|
| INCLUDE | 87.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 74 (#60/124)
- Gemini 3.7 Flash public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 65.2 (#2/7)
- Gemini 3.7 Flash public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | Gemini 3.7 Flash | 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 |

## FAQ

### Which is better overall, Claude Opus 4.8 or Gemini 3.7 Flash?

Claude Opus 4.8 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.8 and Gemini 3.7 Flash?

The widest category gap is in reasoning, where the averages are 59 for Claude Opus 4.8 and 77.8 for Gemini 3.7 Flash.

### 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 Gemini 3.7 Flash cover on BenchLM?

Gemini 3.7 Flash currently has 25 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.8 vs GPT-6 Astra](/compare/claude-opus-4-8-vs-gpt-6-astra)
- [Gemini 3.7 Flash vs GPT-6 Astra](/compare/gemini-3-7-flash-vs-gpt-6-astra)
- [Claude Opus 4.8 vs Claude Opus 5.5](/compare/claude-opus-4-8-vs-claude-opus-5-5)
- [Gemini 3.7 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-3-7-flash)

## Explore More

- [Claude Opus 4.8 profile](/models/claude-opus-4-8)
- [Gemini 3.7 Flash profile](/models/gemini-3-7-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)