# Claude Opus 4.6 vs Gemini 3 Flash

> Side-by-side benchmark comparison for Claude Opus 4.6 and Gemini 3 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-6-vs-gemini-3-flash
- Last updated: October 17, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Opus 4.6 if you want the stronger benchmark profile. Gemini 3 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Opus 4.6 leads overall 62.39 to 54.28.
- The clearest category separation is in coding, where the averages are 46.1 for Claude Opus 4.6 and 32.1 for Gemini 3 Flash.
- The biggest single benchmark swing is Vibe Code Bench in Coding, with scores of 57.57% and 20.20%.
- Gemini 3 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Opus 4.6 | Gemini 3 Flash |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 1M | 1M |
| Overall Score | 62.39 | 54.28 |
| Benchmarks Covered | 36 | 11 |
| Pricing (input/output) | $5.00 / $25.00 | $0.50 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Claude Opus 4.6
- Claude Opus 4.6 public-lane score: 45.7 (Supported · #57/128)
- Gemini 3 Flash public-lane score: 32.4 (Supported · #88/128)

| Benchmark | Claude Opus 4.6 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 65.4% | Coming soon | Coming soon |
| BrowseComp | 83.7% | Coming soon | Coming soon |
| OSWorld-Verified | 72.7% | Coming soon | Coming soon |
| AndroidWorld | 62.0% | Coming soon | Coming soon |
| Claw-Eval | 70.4% | 49.2% | Claude Opus 4.6 |
| DeepSearchQA | 73.7% | Coming soon | Coming soon |
| CyberGym | 66.6% | Coming soon | Coming soon |
| Gert Labs | 61.85% | 56.63% | Claude Opus 4.6 |
| ResearchClawBench | 19.9% | Coming soon | Coming soon |
| JobBench | 36.7% | 11.4% | Claude Opus 4.6 |
| ApprenticeBench | 5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 53.9% | Coming soon |

### Coding

- Winner: Claude Opus 4.6
- Claude Opus 4.6 public-lane score: 46.1 (Supported · #52/150)
- Gemini 3 Flash public-lane score: 32.1 (Supported · #88/150)

| Benchmark | Claude Opus 4.6 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.8% | Coming soon | Coming soon |
| SWE-bench Verified* | 75.6% | Coming soon | Coming soon |
| LiveCodeBench Pro | 70.7% | Coming soon | Coming soon |
| SWE-bench Pro | 53.4% | Coming soon | Coming soon |
| SWE-Rebench | 65.3% | Coming soon | Coming soon |
| React Native Evals | 84.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 65.4% | Coming soon | Coming soon |
| Vibe Code Bench | 57.57% | 20.20% | Claude Opus 4.6 |
| FrontierCode 1.1 Main | 26.9% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.6% | Coming soon |
| SWE-bench (Vals) | Coming soon | 75.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.6 public-lane score: 71.9 (Unranked · 2 rankable rows)
- Gemini 3 Flash public-lane score: 63.8 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Not comparable
- Claude Opus 4.6 public-lane score: 74.5 (#25/54)
- Gemini 3 Flash public-lane score: 80.3 (Unranked · 1 rankable row)

| Benchmark | Claude Opus 4.6 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 77.3% | Coming soon | Coming soon |
| ERQA | 51.6% | Coming soon | Coming soon |
| ScreenSpot Pro | 83.1% | Coming soon | Coming soon |
| MedXpertQA (MM) | 64.8% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.6 public-lane score: 59 (Estimated · #52/184)
- Gemini 3 Flash public-lane score: 55.7 (Supported · #55/184)

| Benchmark | Claude Opus 4.6 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 91.3% | Coming soon | Coming soon |
| GPQA-D | 89.2% | Coming soon | Coming soon |
| SuperGPQA | 95% | Coming soon | Coming soon |
| MMLU-Pro | 82% | Coming soon | Coming soon |
| MMLU-Pro (Arcee) | 89.1% | Coming soon | Coming soon |
| HLE | 53% | Coming soon | Coming soon |
| HLE w/o tools | 40% | Coming soon | Coming soon |
| HealthBench Hard | 14.8% | Coming soon | Coming soon |
| MedXpertQA (Text) | 52.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 87.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 88.6% | Coming soon |

### Instruction Following

- Winner: Directional only
- Claude Opus 4.6 public-lane score: 52.4 (#87/148)
- Gemini 3 Flash public-lane score: 66.1 (#76/148)

### Mathematics

- Winner: Not comparable
- Claude Opus 4.6 public-lane score: 69.1 (Unranked · 3 rankable rows)
- Gemini 3 Flash public-lane score: 57.4 (Unranked · 2 rankable rows)

| Benchmark | Claude Opus 4.6 | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| AIME25 (Arcee) | 99.8% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 65.965% | 51.228% | Claude Opus 4.6 |
| FrontierMath v2 (Tier 4) | 26.829% | 17.073% | Claude Opus 4.6 |

## FAQ

### Which is better overall, Claude Opus 4.6 or Gemini 3 Flash?

Claude Opus 4.6 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.6 and Gemini 3 Flash?

The widest category gap is in coding, where the averages are 46.1 for Claude Opus 4.6 and 32.1 for Gemini 3 Flash.

### How many benchmarks does Claude Opus 4.6 cover on BenchLM?

Claude Opus 4.6 currently has 36 sourced benchmark scores on BenchLM.

### How many benchmarks does Gemini 3 Flash cover on BenchLM?

Gemini 3 Flash currently has 11 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.6 vs Claude Opus 4.6 (Adaptive)](/compare/claude-opus-4-6-vs-claude-opus-4-6-thinking)
- [Gemini 3 Flash vs Claude Opus 4.6 (Adaptive)](/compare/claude-opus-4-6-thinking-vs-gemini-3-flash)
- [Claude Opus 4.6 vs Claude Opus 5.5](/compare/claude-opus-4-6-vs-claude-opus-5-5)
- [Gemini 3 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-3-flash)

## Explore More

- [Claude Opus 4.6 profile](/models/claude-opus-4-6)
- [Gemini 3 Flash profile](/models/gemini-3-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)