# Gemini 3.8 Flash vs o4-mini (high)

> Side-by-side benchmark comparison for Gemini 3.8 Flash and o4-mini (high) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-8-flash-vs-o4-mini-high
- Last updated: October 17, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 3.8 Flash and o4-mini (high) share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- o4-mini (high) has the lower published output-token price.
- Gemini 3.8 Flash has the larger published context window at 1M.

## Model Snapshot

| Property | Gemini 3.8 Flash | o4-mini (high) |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 200K |
| Independent public score (not head-to-head) | 69.25 | null |
| Benchmarks Covered | 31 | 3 |
| Pricing (input/output) | $0.75 / $3.75 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 3.8 Flash public-lane score: 65.9 (Supported · #16/128)
- o4-mini (high) public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | o4-mini (high) | 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 |

### Coding

- Winner: Insufficient shared evidence
- Gemini 3.8 Flash public-lane score: 61 (Supported · #17/150)
- o4-mini (high) public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | o4-mini (high) | 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 |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 3.8 Flash public-lane score: 74.3 (#17/28)
- o4-mini (high) public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | o4-mini (high) | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 98.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 89.2% | Coming soon | Coming soon |
| ARC-AGI-3 | 10.4% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 3.8 Flash public-lane score: 87.3 (#9/54)
- o4-mini (high) public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | o4-mini (high) | Winner |
|-----------|-----------|-----------|--------|
| CharXiv w/o tools | 86.2% | Coming soon | Coming soon |
| LVBench | 87.1% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 3.8 Flash public-lane score: 73.5 (Supported · #13/184)
- o4-mini (high) public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | o4-mini (high) | 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 |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 3.8 Flash public-lane score: Coming soon
- o4-mini (high) public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | o4-mini (high) | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 5.5% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 3.8 Flash public-lane score: 69.7 (Unranked · 2 rankable rows)
- o4-mini (high) public-lane score: 45 (Unranked · 3 rankable rows)

| Benchmark | Gemini 3.8 Flash | o4-mini (high) | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 68.421% | 36.140% | Gemini 3.8 Flash |
| FrontierMath v2 (Tier 4) | 21.951% | 4.878% | Gemini 3.8 Flash |
| AIME 2025 | Coming soon | 92.7% | Coming soon |

## FAQ

### Is there enough evidence to pick between Gemini 3.8 Flash and o4-mini (high)?

Not yet. The models share only 2 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

- [Gemini 3.8 Flash vs Gemini 3.8 Flash Cyber](/compare/gemini-3-8-flash-vs-gemini-3-8-flash-cyber)
- [o4-mini (high) vs Gemini 3.8 Flash Cyber](/compare/gemini-3-8-flash-cyber-vs-o4-mini-high)
- [Gemini 3.8 Flash vs o4-mini](/compare/gemini-3-8-flash-vs-o4-mini)
- [o4-mini (high) vs o4-mini](/compare/o4-mini-vs-o4-mini-high)

## Explore More

- [Gemini 3.8 Flash profile](/models/gemini-3-8-flash)
- [o4-mini (high) profile](/models/o4-mini-high)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)