# Gemini 2.0 Flash vs GPT-4.5

> Side-by-side benchmark comparison for Gemini 2.0 Flash and GPT-4.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-2-0-flash-vs-gpt-4-5
- Last updated: October 14, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 2.0 Flash and GPT-4.5 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.
- Gemini 2.0 Flash has the larger published context window at 1M.

## Model Snapshot

| Property | Gemini 2.0 Flash | GPT-4.5 |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 1M | 128K |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 5 | 6 |
| Pricing (input/output) | N/A | $75.00 / $150.00 |

## Category Breakdown

### Coding

- Winner: Insufficient shared evidence
- Gemini 2.0 Flash public-lane score: Coming soon
- GPT-4.5 public-lane score: Coming soon

| Benchmark | Gemini 2.0 Flash | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 21.4% | Coming soon | Coming soon |
| HumanEval | Coming soon | 88.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 2.0 Flash public-lane score: Coming soon
- GPT-4.5 public-lane score: Coming soon

| Benchmark | Gemini 2.0 Flash | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| DROP | Coming soon | 83.4% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 2.0 Flash public-lane score: Coming soon
- GPT-4.5 public-lane score: Coming soon

| Benchmark | Gemini 2.0 Flash | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU | 69.3% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 2.0 Flash public-lane score: Coming soon
- GPT-4.5 public-lane score: Coming soon

| Benchmark | Gemini 2.0 Flash | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 65.2% | 69.5% | GPT-4.5 |
| SimpleQA | 29.9% | 62.5% | GPT-4.5 |
| MMLU | Coming soon | 90.8% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Gemini 2.0 Flash public-lane score: Coming soon
- GPT-4.5 public-lane score: Coming soon

| Benchmark | Gemini 2.0 Flash | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| MGSM | Coming soon | 86.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 2.0 Flash public-lane score: Coming soon
- GPT-4.5 public-lane score: Coming soon

| Benchmark | Gemini 2.0 Flash | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 29.7% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Gemini 2.0 Flash and GPT-4.5?

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 2.0 Flash vs Gemini 2.0 Flash-Lite](/compare/gemini-2-0-flash-vs-gemini-2-0-flash-lite)
- [GPT-4.5 vs Gemini 2.0 Flash-Lite](/compare/gemini-2-0-flash-lite-vs-gpt-4-5)
- [Gemini 2.0 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-2-0-flash)
- [GPT-4.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gpt-4-5)

## Explore More

- [Gemini 2.0 Flash profile](/models/gemini-2-0-flash)
- [GPT-4.5 profile](/models/gpt-4-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)