Model comparison
Gemini 1.5 Flash (May 2024) vs Gemini 2.5 Flash-Lite
Gemini 2.5 Flash-Lite is the stronger model overall, scoring 37.0 to 33.2 on the Noometry Index.
Last verified . 26 shared benchmarks.
GoogleSummary
- They share 26 benchmarks with published results for both. Gemini 1.5 Flash (May 2024) scores higher in 2 categories and Gemini 2.5 Flash-Lite in 8 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 2.5 Flash-Lite leads 38.0 to 22.1.
- The biggest single-benchmark swing is Omni-MATH: 30.4% for Gemini 1.5 Flash (May 2024) and 48% for Gemini 2.5 Flash-Lite.
Side by side
| Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite | |
|---|---|---|
| Provider | ||
| Noometry Index | 33.2 | 37.0 |
| Released | 2024-05-14 | 2025-06-17 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.40 |
| Results tracked | 42 | 33 |
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Category by category
Coding Gemini 2.5 Flash-Lite leads
Gemini 1.5 Flash (May 2024): 34.4 (#236), Gemini 2.5 Flash-Lite: 38.5 (#173)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| WeirdML | 24.9% | 35.2% |
| LMArena Coding | 1261 | 1373 |
| BigCodeBench Instruct | 43.5% | — |
| BigCodeBench Complete | 55.1% | — |
| ALE-Bench | — | 325.9 |
| HumanEval+ | 75.6% | — |
| MBPP+ | 67.5% | — |
Agentic & Tool Use Gemini 2.5 Flash-Lite leads
Gemini 1.5 Flash (May 2024): 26.6 (#102), Gemini 2.5 Flash-Lite: 28.0 (#96)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 36.9% |
| BALROG | 14.6% | — |
Reasoning Too close to call
Gemini 1.5 Flash (May 2024): 21.7 (#215), Gemini 2.5 Flash-Lite: 22.2 (#205)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Hard Prompts | 1257 | 1377 |
| DTBench | 53.8% | 62.8% |
| Epoch Capabilities Index | 129.36 | 133.94 |
| Kagi LLM Benchmark | — | 40.5% |
| LMCA | — | 18.1% |
| ForecastBench | 53.9 | — |
| PIQA | 87.5% | — |
Math Gemini 2.5 Flash-Lite leads
Gemini 1.5 Flash (May 2024): 22.1 (#281), Gemini 2.5 Flash-Lite: 38.0 (#144)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| Omni-MATH | 30.4% | 48% |
| LMArena Math | 1269 | 1373 |
| OTIS Mock AIME 2024-2025 | 16.3% | — |
| MATH Level 5 | 61.9% | — |
| FrontierMath (Feb 2025 set) | 0% | — |
| GSM8K | 82.4% | — |
Knowledge Gemini 2.5 Flash-Lite leads
Gemini 1.5 Flash (May 2024): 26.2 (#260), Gemini 2.5 Flash-Lite: 32.5 (#210)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| MMLU-Pro | 67.8% | 53.7% |
| GPQA (HELM) | 43.7% | 30.9% |
| LMArena Expert | 1233 | 1373 |
| GPQA Diamond | 47.3% | — |
| Vectara Hallucination Rate | — | 3.3% |
| BoolQ | 85.8% | — |
| MMLU | 77.9% | — |
Multimodal Gemini 1.5 Flash (May 2024) leads
Gemini 1.5 Flash (May 2024): 36.0 (#81), Gemini 2.5 Flash-Lite: 29.1 (#114)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Vision | 1141 | 1198 |
| Video-MME | 70.3% | — |
| GeoBench | 76% | — |
| VPCT | — | 30% |
Multilingual Gemini 2.5 Flash-Lite leads
Gemini 1.5 Flash (May 2024): 42.9 (#189), Gemini 2.5 Flash-Lite: 49.3 (#134)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Non-English | 1278 | 1369 |
| LMArena Chinese | 1295 | 1404 |
| LMArena French | 1258 | 1388 |
| LMArena German | 1262 | 1389 |
| LMArena Japanese | 1252 | 1359 |
| LMArena Korean | 1221 | 1360 |
| LMArena Russian | 1288 | 1373 |
| LMArena Spanish | 1243 | 1396 |
Instruction Following Gemini 2.5 Flash-Lite leads
Gemini 1.5 Flash (May 2024): 66.8 (#205), Gemini 2.5 Flash-Lite: 70.0 (#168)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| IFEval | 83.1% | 81% |
| LMArena Instruction Following | 1258 | 1367 |
Long Context Gemini 1.5 Flash (May 2024) leads
Gemini 1.5 Flash (May 2024): 39.0 (#187), Gemini 2.5 Flash-Lite: 33.3 (#262)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Longer Query | 1284 | 1373 |
| Fiction.LiveBench | — | 47.2% |
Writing & Preference Gemini 2.5 Flash-Lite leads
Gemini 1.5 Flash (May 2024): 48.7 (#196), Gemini 2.5 Flash-Lite: 56.8 (#135)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Text | 1287 | 1379 |
| LMArena Creative Writing | 1285 | 1367 |
| WildBench | 79.2% | 81.8% |
| LMArena Multi-Turn | 1253 | 1366 |
Frequently asked questions
Is Gemini 1.5 Flash (May 2024) better than Gemini 2.5 Flash-Lite?
Gemini 2.5 Flash-Lite is the stronger model overall, scoring 37.0 to 33.2 on the Noometry Index.
Is Gemini 1.5 Flash (May 2024) or Gemini 2.5 Flash-Lite better for coding?
Gemini 2.5 Flash-Lite scores higher on coding benchmarks: 38.5 versus 34.4 in the Noometry coding category.
How many benchmarks do Gemini 1.5 Flash (May 2024) and Gemini 2.5 Flash-Lite share?
26 benchmarks have published results for both models. Gemini 1.5 Flash (May 2024) has 42 scored results on Noometry and Gemini 2.5 Flash-Lite has 33.