# Gemini 1.0 Pro vs Gemini 2.5 Flash

> Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 27.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-0-pro-vs-gemini-2-5-flash
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Gemini 1.0 Pro scores higher in 0 categories and Gemini 2.5 Flash in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 2.5 Flash leads 39.9 to 9.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.1% for Gemini 1.0 Pro and 73.1% for Gemini 2.5 Flash.

## Snapshot

| | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 27.3 | 39.3 |
| Rank | 332 | 170 |
| Context | — | 1.05M |
| Input $/M | — | $0.30 |
| Output $/M | — | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 1.0 Pro: 32.2 (#275)
- Gemini 2.5 Flash: 35.8 (#220)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| LMArena Coding | 1108 | 1424 |
| SWE-bench Verified (bash only) | — | 28.7% |
| Aider Polyglot | — | 55.1% |
| WeirdML | — | 41.9% |
| ALE-Bench | — | 661.88 |
| HumanEval+ | 55.5% | — |
| MBPP+ | 61.4% | — |

## Agentic & Tool Use

- Gemini 1.0 Pro: —
- Gemini 2.5 Flash: 30.8 (#74)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| Terminal-Bench | — | 17.1% |
| Berkeley Function Calling Leaderboard | — | 56.2% |
| TheAgentCompany | — | 41.1% |
| BALROG | — | 33.5% |
| Vending-Bench 2 | — | 548.84 |

## Reasoning

- Gemini 1.0 Pro: 17.1 (#296)
- Gemini 2.5 Flash: 18.1 (#286)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1109 | 1422 |
| DTBench | 45.9% | 76.5% |
| Epoch Capabilities Index | 117.04 | 143.03 |
| ARC-AGI-2 | — | 2.5% |
| SimpleBench | — | 41.2% |
| Kagi LLM Benchmark | — | 56.8% |
| ARC-AGI-1 | — | 33.3% |
| CritPt | — | 1.1% |
| EnigmaEval | — | 2.7% |
| LMCA | — | 27.5% |
| ForecastBench | — | 60.6 |

## Math

- Gemini 1.0 Pro: 9.3 (#321)
- Gemini 2.5 Flash: 39.9 (#98)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.1% | 73.1% |
| LMArena Math | 1132 | 1415 |
| Omni-MATH | — | 38.5% |
| MATH Level 5 | 11.2% | — |
| FrontierMath (Feb 2025 set) | — | 4.8% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Gemini 1.0 Pro: 15.6 (#291)
- Gemini 2.5 Flash: 36.4 (#168)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| LMArena Expert | 1059 | 1426 |
| GPQA Diamond | 34% | — |
| Humanity's Last Exam | — | 12.1% |
| MMLU-Pro | — | 63.9% |
| Confabulations | — | 16.8% |
| Vectara Hallucination Rate | — | 7.8% |
| GPQA (HELM) | — | 39% |
| MMLU | 70% | — |

## Multimodal

- Gemini 1.0 Pro: —
- Gemini 2.5 Flash: 41.8 (#32)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| LMArena Vision | — | 1253 |
| GeoBench | — | 76% |
| VPCT | — | 46.2% |
| SpatialViz-Bench | — | 36.9% |

## Multilingual

- Gemini 1.0 Pro: 33.4 (#252)
- Gemini 2.5 Flash: 52.3 (#88)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| LMArena Non-English | 1138 | 1409 |
| LMArena Chinese | 1124 | 1450 |
| LMArena French | 1145 | 1433 |
| LMArena German | 1125 | 1418 |
| LMArena Japanese | 1023 | 1405 |
| LMArena Russian | 1186 | 1415 |
| LMArena Spanish | 1119 | 1421 |
| LMArena Korean | — | 1385 |

## Instruction Following

- Gemini 1.0 Pro: 57.6 (#267)
- Gemini 2.5 Flash: 75.7 (#54)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1114 | 1405 |
| IFEval | — | 89.8% |

## Long Context

- Gemini 1.0 Pro: 34.3 (#249)
- Gemini 2.5 Flash: 47.5 (#17)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| LMArena Longer Query | 1132 | 1419 |
| Fiction.LiveBench | — | 77.8% |

## Writing & Preference

- Gemini 1.0 Pro: 36.0 (#264)
- Gemini 2.5 Flash: 53.8 (#157)

| Benchmark | Gemini 1.0 Pro | Gemini 2.5 Flash |
|---|---|---|
| LMArena Text | 1149 | 1417 |
| LMArena Creative Writing | 1131 | 1400 |
| LMArena Multi-Turn | 1139 | 1408 |
| Short-Story Creative Writing | — | 76.5% |
| EQ-Bench Creative Writing | — | 1137 |
| WildBench | — | 81.7% |

## FAQ

### Is Gemini 1.0 Pro better than Gemini 2.5 Flash?

Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 27.3 on the Noometry Index.

### Is Gemini 1.0 Pro or Gemini 2.5 Flash better for coding?

Gemini 2.5 Flash scores higher on coding benchmarks: 35.8 versus 32.2 in the Noometry coding category.

### How many benchmarks do Gemini 1.0 Pro and Gemini 2.5 Flash share?

19 benchmarks have published results for both models. Gemini 1.0 Pro has 24 scored results on Noometry and Gemini 2.5 Flash has 54.