# Gemini 3.8 Flash vs GPT-5.2

> Side-by-side benchmark comparison for Gemini 3.8 Flash and GPT-5.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-8-flash-vs-gpt-5-2
- Last updated: October 17, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Gemini 3.8 Flash if you want the stronger benchmark profile. GPT-5.2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Gemini 3.8 Flash leads overall 69.25 to 59.86.
- The clearest category separation is in coding, where the averages are 61 for Gemini 3.8 Flash and 36.8 for GPT-5.2.
- The biggest single benchmark swing is ARC-AGI-2 in Reasoning, with scores of 89.2% and 52.9%.
- Gemini 3.8 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemini 3.8 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | Gemini 3.8 Flash | GPT-5.2 |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 400K |
| Overall Score | 69.25 | 59.86 |
| Benchmarks Covered | 31 | 31 |
| Pricing (input/output) | $0.75 / $3.75 | $1.75 / $14.00 |

## Category Breakdown

### Agentic

- Winner: Gemini 3.8 Flash
- Gemini 3.8 Flash public-lane score: 65.9 (Supported · #16/128)
- GPT-5.2 public-lane score: 44.4 (Supported · #58/128)

| Benchmark | Gemini 3.8 Flash | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| Finance Agent v2 | 61.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 89.4% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 19.10% | Coming soon | Coming soon |
| OSWorld 2.0 | 59.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 81.3% | Coming soon | Coming soon |
| ApprenticeBench | 24% | Coming soon | Coming soon |
| Hermes Index | 38.1% | Coming soon | Coming soon |
| Hermes Bench | 62.2% | Coming soon | Coming soon |
| MazeBench | 4% | Coming soon | Coming soon |
| BrowseComp | Coming soon | 65.8% | Coming soon |
| OSWorld-Verified | Coming soon | 47.3% | Coming soon |
| Gert Labs | Coming soon | 46.54% | Coming soon |
| JobBench | Coming soon | 34.3% | Coming soon |

### Coding

- Winner: Gemini 3.8 Flash
- Gemini 3.8 Flash public-lane score: 61 (Supported · #17/150)
- GPT-5.2 public-lane score: 36.8 (Supported · #73/150)

| Benchmark | Gemini 3.8 Flash | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 73.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 89.4% | Coming soon | Coming soon |
| CursorBench 3.2 | 69.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 89.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 80.0% | Coming soon | Coming soon |
| FrontierSWE v2 | 19.6% | Coming soon | Coming soon |
| CursorBench 4.0 | 39.6% | Coming soon | Coming soon |
| Bug Hunt Bench | 18.0 fixes | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 80% | Coming soon |
| SWE-bench Pro | Coming soon | 55.6% | Coming soon |
| Vibe Code Bench | Coming soon | 53.50% | Coming soon |

### Reasoning

- Winner: Not comparable
- Gemini 3.8 Flash public-lane score: 74.3 (#17/28)
- GPT-5.2 public-lane score: 64.3 (Unranked · 4 rankable rows)

| Benchmark | Gemini 3.8 Flash | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 98.50% | 86.17% | Gemini 3.8 Flash |
| ARC-AGI-2 | 89.2% | 52.9% | Gemini 3.8 Flash |
| ARC-AGI-3 | 10.4% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Gemini 3.8 Flash public-lane score: 87.3 (#9/54)
- GPT-5.2 public-lane score: 75.9 (#22/54)

| Benchmark | Gemini 3.8 Flash | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| CharXiv w/o tools | 86.2% | Coming soon | Coming soon |
| LVBench | 87.1% | Coming soon | Coming soon |
| MMMU | Coming soon | 86.7% | Coming soon |
| MMMU-Pro | Coming soon | 79.5% | Coming soon |
| RealWorldQA | Coming soon | 83.3% | Coming soon |
| OmniDocBench 1.5 | Coming soon | 85.7% | Coming soon |
| Video-MME (with subtitle) | Coming soon | 86.0% | Coming soon |
| Video-MME (w/o subtitle) | Coming soon | 85.8% | Coming soon |
| MathVision | Coming soon | 83.0% | Coming soon |
| We-Math | Coming soon | 79.0% | Coming soon |
| DynaMath | Coming soon | 86.8% | Coming soon |
| SimpleVQA | Coming soon | 55.8% | Coming soon |
| CC-OCR | Coming soon | 70.3% | Coming soon |
| AI2D_TEST | Coming soon | 92.2% | Coming soon |
| CountBench | Coming soon | 91.9% | Coming soon |
| ERQA | Coming soon | 59.8% | Coming soon |
| VideoMMMU | Coming soon | 85.9% | Coming soon |
| MLVU (M-Avg) | Coming soon | 85.6% | Coming soon |
| CharXiv | Coming soon | 82.1% | Coming soon |
| V* | Coming soon | 75.9% | Coming soon |

### Knowledge

- Winner: Gemini 3.8 Flash
- Gemini 3.8 Flash public-lane score: 73.5 (Supported · #13/184)
- GPT-5.2 public-lane score: 59.7 (Supported · #50/184)

| Benchmark | Gemini 3.8 Flash | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| HLE-Verified | 54.9% | Coming soon | Coming soon |
| LABBench2 | 86.2% | Coming soon | Coming soon |
| BioMysteryBench (human-solvable) | 88.8% | Coming soon | Coming soon |
| BioMysteryBench (human-difficult) | 56.5% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 94.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 90.2% | Coming soon | Coming soon |
| GPQA | Coming soon | 92.4% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Gemini 3.8 Flash public-lane score: Coming soon
- GPT-5.2 public-lane score: 92.6 (#19/148)

| Benchmark | Gemini 3.8 Flash | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 5.5% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Gemini 3.8 Flash public-lane score: 69.7 (Unranked · 2 rankable rows)
- GPT-5.2 public-lane score: 71.1 (Unranked · 3 rankable rows)

| Benchmark | Gemini 3.8 Flash | GPT-5.2 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 68.421% | 67.400% | Gemini 3.8 Flash |
| FrontierMath v2 (Tier 4) | 21.951% | 31.700% | GPT-5.2 |
| AIME 2025 | Coming soon | 100% | Coming soon |

## FAQ

### Which is better overall, Gemini 3.8 Flash or GPT-5.2?

Gemini 3.8 Flash is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemini 3.8 Flash and GPT-5.2?

The widest category gap is in coding, where the averages are 61 for Gemini 3.8 Flash and 36.8 for GPT-5.2.

### How many benchmarks does Gemini 3.8 Flash cover on BenchLM?

Gemini 3.8 Flash currently has 31 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.2 cover on BenchLM?

GPT-5.2 currently has 31 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3.8 Flash vs Gemini 3.8 Flash Cyber](/compare/gemini-3-8-flash-vs-gemini-3-8-flash-cyber)
- [GPT-5.2 vs Gemini 3.8 Flash Cyber](/compare/gemini-3-8-flash-cyber-vs-gpt-5-2)
- [Gemini 3.8 Flash vs GPT-5.2 Pro](/compare/gemini-3-8-flash-vs-gpt-5-2-pro)
- [GPT-5.2 vs GPT-5.2 Pro](/compare/gpt-5-2-vs-gpt-5-2-pro)

## Explore More

- [Gemini 3.8 Flash profile](/models/gemini-3-8-flash)
- [GPT-5.2 profile](/models/gpt-5-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)