# Gemini 2.5 Flash vs Gemini 3 Flash

> Side-by-side benchmark comparison for Gemini 2.5 Flash and Gemini 3 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-2-5-flash-vs-gemini-3-flash
- Last updated: September 29, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 2.5 Flash and Gemini 3 Flash 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 2.5 Flash has the lower published output-token price.

## Model Snapshot

| Property | Gemini 2.5 Flash | Gemini 3 Flash |
|----------|----------|----------|
| Creator | Google | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 42.97 | 55.5 |
| Benchmarks Covered | 2 | 11 |
| Pricing (input/output) | $0.30 / $2.50 | $0.50 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 31.7 (Supported · #76/117)

| Benchmark | Gemini 2.5 Flash | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| Claw-Eval | Coming soon | 49.2% | Coming soon |
| Gert Labs | Coming soon | 56.63% | Coming soon |
| JobBench | Coming soon | 11.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 53.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 36.4 (Supported · #74/143)

| Benchmark | Gemini 2.5 Flash | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | Coming soon | 20.20% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.6% | Coming soon |
| SWE-bench (Vals) | Coming soon | 75.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 56.5 (Unranked · 2 rankable rows)
- Gemini 3 Flash public-lane score: 60.3 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 57.6 (Unranked · 1 rankable row)
- Gemini 3 Flash public-lane score: 76.9 (Unranked · 1 rankable row)

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 35.9 (Estimated · #113/169)
- Gemini 3 Flash public-lane score: 54.3 (Supported · #47/169)

| Benchmark | Gemini 2.5 Flash | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 87.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 88.6% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 43.7 (#93/124)
- Gemini 3 Flash public-lane score: 64.7 (#70/124)

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 28.6 (Unranked · 2 rankable rows)
- Gemini 3 Flash public-lane score: 50 (Unranked · 2 rankable rows)

| Benchmark | Gemini 2.5 Flash | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 4.844% | 35.640% | Gemini 3 Flash |
| FrontierMath v2 (Tier 4) | 4.167% | 4.167% | Tie |

## FAQ

### Is there enough evidence to pick between Gemini 2.5 Flash and Gemini 3 Flash?

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 2.5 Flash vs GPT-6 Astra](/compare/gemini-2-5-flash-vs-gpt-6-astra)
- [Gemini 3 Flash vs GPT-6 Astra](/compare/gemini-3-flash-vs-gpt-6-astra)
- [Gemini 2.5 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-2-5-flash)
- [Gemini 3 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-3-flash)

## Explore More

- [Gemini 2.5 Flash profile](/models/gemini-2-5-flash)
- [Gemini 3 Flash profile](/models/gemini-3-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)