# Claude Opus 4.5 vs Gemini 3.5 Flash-Lite

> Side-by-side benchmark comparison for Claude Opus 4.5 and Gemini 3.5 Flash-Lite across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-5-vs-gemini-3-5-flash-lite
- Last updated: September 4, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Opus 4.5 and Gemini 3.5 Flash-Lite share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Gemini 3.5 Flash-Lite has the lower published output-token price.
- Gemini 3.5 Flash-Lite has the larger published context window at 1M.

## Model Snapshot

| Property | Claude Opus 4.5 | Gemini 3.5 Flash-Lite |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 1M |
| Independent public score (not head-to-head) | 60.25 | 60.5 |
| Benchmarks Covered | 45 | 10 |
| Pricing (input/output) | $5.00 / $25.00 | $0.30 / $2.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Opus 4.5 public-lane score: 44.5 (Estimated · #101/151)
- Gemini 3.5 Flash-Lite public-lane score: 43.4 (Estimated · #104/151)

| Benchmark | Claude Opus 4.5 | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | 54% | Claude Opus 4.5 |
| OSWorld-Verified | 66.3% | 74% | Gemini 3.5 Flash-Lite |
| OSWorld | 66.3% | Coming soon | Coming soon |
| Claw-Eval | 59.6% | Coming soon | Coming soon |
| QwenClawBench | 52.3% | Coming soon | Coming soon |
| τ³-bench results | 70.2% | Coming soon | Coming soon |
| VITA-Bench | 23.3% | Coming soon | Coming soon |
| DeepPlanning | 26.4% | Coming soon | Coming soon |
| Toolathlon | 43.5% | Coming soon | Coming soon |
| MCP Atlas | 42.3% | Coming soon | Coming soon |
| MCP-Tasks | 71.8% | Coming soon | Coming soon |
| WideResearch | 76.4% | Coming soon | Coming soon |
| CyberGym | 50.6% | Coming soon | Coming soon |
| Gert Labs | 64.23% | Coming soon | Coming soon |
| JobBench | 32.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 50.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Opus 4.5 public-lane score: 55.1 (Supported · #42/183)
- Gemini 3.5 Flash-Lite public-lane score: 43.6 (Supported · #121/183)

| Benchmark | Claude Opus 4.5 | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | Coming soon | Coming soon |
| LiveCodeBench v6 | 84.8% | Coming soon | Coming soon |
| SWE-bench Pro | 57.1% | 54.2% | Claude Opus 4.5 |
| SWE Multilingual | 77.5% | Coming soon | Coming soon |
| NL2Repo | 43.2% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 54.0% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 79.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 75.0% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Opus 4.5 public-lane score: 23.4 (#46/48)
- Gemini 3.5 Flash-Lite public-lane score: 76.1 (#16/48)

| Benchmark | Claude Opus 4.5 | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 70.6% | Coming soon | Coming soon |
| MathVision | 74.3% | Coming soon | Coming soon |
| CharXiv | 68.5% | Coming soon | Coming soon |
| VideoMMMU | 84.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 45.7% | Coming soon | Coming soon |
| V* | 67.0% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Opus 4.5 public-lane score: 72.1 (Unranked · 4 rankable rows)
- Gemini 3.5 Flash-Lite public-lane score: 60.8 (Unranked · 3 rankable rows)

| Benchmark | Claude Opus 4.5 | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | Coming soon | Coming soon |
| AI-Needle | 74% | Coming soon | Coming soon |
| MRCRv2 | Coming soon | 72.2% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Opus 4.5 public-lane score: 55.4 (Estimated · #60/181)
- Gemini 3.5 Flash-Lite public-lane score: 53 (Supported · #71/181)

| Benchmark | Claude Opus 4.5 | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87% | Coming soon | Coming soon |
| SuperGPQA | 70.6% | Coming soon | Coming soon |
| MMLU-Pro | 89.5% | Coming soon | Coming soon |
| MMLU-Redux | 96.6% | Coming soon | Coming soon |
| C-Eval | 92.2% | Coming soon | Coming soon |
| HLE | 30.8% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 83.8% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 85.8% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Opus 4.5 public-lane score: 39.5 (#103/120)
- Gemini 3.5 Flash-Lite public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 90.9% | Coming soon | Coming soon |
| IFBench | 58% | Coming soon | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Claude Opus 4.5 public-lane score: 82.9 (#2/12)
- Gemini 3.5 Flash-Lite public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 85.7% | Coming soon | Coming soon |
| NOVA-63 | 56.7% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Opus 4.5 public-lane score: 58.3 (#6/7)
- Gemini 3.5 Flash-Lite public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.1% | Coming soon | Coming soon |
| HMMT Feb 2025 | 92.9% | Coming soon | Coming soon |
| HMMT Nov 2025 | 93.3% | Coming soon | Coming soon |
| HMMT Feb 2026 | 85.3% | Coming soon | Coming soon |
| MMAnswerBench | 84.0% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 20.690% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 4.167% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Opus 4.5 and Gemini 3.5 Flash-Lite?

Not yet. The models share only 3 sourced benchmark rows, 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

- [Claude Opus 4.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [Gemini 3.5 Flash-Lite vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-gemini-3-5-flash-lite)
- [Claude Opus 4.5 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-opus-4-5)
- [Gemini 3.5 Flash-Lite vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-3-5-flash-lite)

## Explore More

- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Gemini 3.5 Flash-Lite profile](/models/gemini-3-5-flash-lite)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)