# Claude Opus 4.5 Thinking vs Gemini 3.6 Flash

> Side-by-side benchmark comparison for Claude Opus 4.5 Thinking and Gemini 3.6 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-5-thinking-vs-gemini-3-6-flash
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Claude Opus 4.5 Thinking and Gemini 3.6 Flash.

## Summary

- Claude Opus 4.5 Thinking and Gemini 3.6 Flash do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Claude Opus 4.5 Thinking | Gemini 3.6 Flash |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 1M |
| Independent public score (not head-to-head) | 56.09 | 70.11 |
| Benchmarks Covered | 1 | 8 |
| Pricing (input/output) | N/A | $1.50 / $7.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Opus 4.5 Thinking public-lane score: Coming soon
- Gemini 3.6 Flash public-lane score: 50.7 (Supported · #60/151)

| Benchmark | Claude Opus 4.5 Thinking | Gemini 3.6 Flash | Winner |
|-----------|-----------|-----------|--------|
| OSWorld-Verified | Coming soon | 83% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 73.8% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Opus 4.5 Thinking public-lane score: 55.2 (Estimated · #41/183)
- Gemini 3.6 Flash public-lane score: 58.9 (Supported · #30/183)

| Benchmark | Claude Opus 4.5 Thinking | Gemini 3.6 Flash | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 20.63% | Coming soon | Coming soon |
| deepSwe | Coming soon | 49% | Coming soon |
| cursorBench32 | Coming soon | 53.5% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 88.1% | Coming soon |
| SWE-bench (Vals) | Coming soon | 79.6% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Opus 4.5 Thinking public-lane score: 68.7 (Unranked · 1 rankable row)
- Gemini 3.6 Flash public-lane score: 82.3 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- Claude Opus 4.5 Thinking public-lane score: 75.7 (Unranked · 2 rankable rows)
- Gemini 3.6 Flash public-lane score: 77.8 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Claude Opus 4.5 Thinking public-lane score: 56.1 (Estimated · #54/181)
- Gemini 3.6 Flash public-lane score: 68.6 (Supported · #18/181)

| Benchmark | Claude Opus 4.5 Thinking | Gemini 3.6 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 93.4% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 89.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Opus 4.5 Thinking public-lane score: 69.7 (#63/120)
- Gemini 3.6 Flash public-lane score: Coming soon

## FAQ

### Can I compare Claude Opus 4.5 Thinking and Gemini 3.6 Flash on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Claude Opus 4.5 Thinking vs Claude Opus 4.5](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [Gemini 3.6 Flash vs Claude Opus 4.5](/compare/claude-opus-4-5-vs-gemini-3-6-flash)
- [Claude Opus 4.5 Thinking vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-opus-4-5-thinking)
- [Gemini 3.6 Flash vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-3-6-flash)

## Explore More

- [Claude Opus 4.5 Thinking profile](/models/claude-opus-4-5-thinking)
- [Gemini 3.6 Flash profile](/models/gemini-3-6-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)