# Gemini 3.5 Flash Cyber vs GPT-5.6 Terra

> Side-by-side benchmark comparison for Gemini 3.5 Flash Cyber and GPT-5.6 Terra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-5-flash-cyber-vs-gpt-5-6-terra
- Last updated: September 4, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 3.5 Flash Cyber and GPT-5.6 Terra share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Gemini 3.5 Flash Cyber has the lower published output-token price.
- GPT-5.6 Terra has the larger published context window at 1.05M.

## Model Snapshot

| Property | Gemini 3.5 Flash Cyber | GPT-5.6 Terra |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | null | 1.05M |
| Independent public score (not head-to-head) | null | 71.44 |
| Benchmarks Covered | 1 | 31 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $2.50 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash Cyber public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 60.8 (Supported · #22/151)

| Benchmark | Gemini 3.5 Flash Cyber | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| CyberGym | 83.2% | 81.8% | Gemini 3.5 Flash Cyber |
| Terminal-Bench 3.0 | Coming soon | 20.8% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 87.4% | Coming soon |
| BrowseComp | Coming soon | 87.5% | Coming soon |
| OSWorld 2.0 | Coming soon | 50.2% | Coming soon |
| ExploitGym | Coming soon | 23.2% | Coming soon |
| Toolathlon | Coming soon | 53.1% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 77.5% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash Cyber public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 67.2 (Supported · #9/183)

| Benchmark | Gemini 3.5 Flash Cyber | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | Coming soon | 63.4% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 87.4% | Coming soon |
| deepSwe | Coming soon | 69.6% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 55.8% | Coming soon |
| cursorBench32 | Coming soon | 64.9% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.9% | Coming soon |
| SWE-bench (Vals) | Coming soon | 95.4% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash Cyber public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 77.1 (#15/48)

| Benchmark | Gemini 3.5 Flash Cyber | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 80.7% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 82% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash Cyber public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 63.4 (#16/22)

| Benchmark | Gemini 3.5 Flash Cyber | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | Coming soon | 83.9% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.8% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash Cyber public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 69.6 (Supported · #15/181)

| Benchmark | Gemini 3.5 Flash Cyber | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 92.9% | Coming soon |
| GPQA-D | Coming soon | 92.9% | Coming soon |
| HLE-Verified | Coming soon | 51.1% | Coming soon |
| LABBench2 | Coming soon | 81.2% | Coming soon |
| HealthBench Professional | Coming soon | 57.7% | Coming soon |
| HealthBench Hard | Coming soon | 32.7% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 90.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.7% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash Cyber public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 86.8 (#35/120)

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash Cyber public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 97 (Unranked · 3 rankable rows)

| Benchmark | Gemini 3.5 Flash Cyber | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | Coming soon | 84.9% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 84.900% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 68.300% | Coming soon |

## FAQ

### Is there enough evidence to pick between Gemini 3.5 Flash Cyber and GPT-5.6 Terra?

Not yet. The models share only 1 sourced benchmark row, 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

- [Gemini 3.5 Flash Cyber vs Gemini 3.5 Flash](/compare/gemini-3-5-flash-vs-gemini-3-5-flash-cyber)
- [GPT-5.6 Terra vs Gemini 3.5 Flash](/compare/gemini-3-5-flash-vs-gpt-5-6-terra)
- [Gemini 3.5 Flash Cyber vs GPT-5.6 Sol](/compare/gemini-3-5-flash-cyber-vs-gpt-5-6-sol)
- [GPT-5.6 Terra vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)

## Explore More

- [Gemini 3.5 Flash Cyber profile](/models/gemini-3-5-flash-cyber)
- [GPT-5.6 Terra profile](/models/gpt-5-6-terra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)