Model comparison
Gemini 2.5 Flash-Lite vs Gemini 3 Deep Think
Gemini 2.5 Flash-Lite has enough public results to be ranked (#208); Gemini 3 Deep Think does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
GoogleSummary
- The widest gap is in reasoning, where Gemini 3 Deep Think leads 70.8 to 21.5.
Side by side
| Gemini 2.5 Flash-Lite | Gemini 3 Deep Think | |
|---|---|---|
| Provider | ||
| Noometry Index | 36.4 | 58.5 |
| Released | 2025-06-17 | 2026-02-12 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.10 | — |
| Output $ / M tokens | $0.40 | — |
| Results tracked | 33 | 3 |
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Category by category
Coding Not comparable
Gemini 2.5 Flash-Lite: 38.0 (#167), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| WeirdML | 35.2% | — |
| LMArena Coding | 1373 | — |
| ALE-Bench | 325.9 | — |
Agentic & Tool Use Not comparable
Gemini 2.5 Flash-Lite: 27.8 (#89), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| Berkeley Function Calling Leaderboard | 36.9% | — |
Reasoning Gemini 3 Deep Think leads
Gemini 2.5 Flash-Lite: 21.5 (#196), Gemini 3 Deep Think: 70.8 (#11)
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| ARC-AGI-2 | — | 84.6% |
| Kagi LLM Benchmark | 40.5% | — |
| ARC-AGI-1 | — | 96% |
| CritPt | — | 25.7% |
| LMArena Hard Prompts | 1377 | — |
| DTBench | 62.8% | — |
| LMCA | 18.1% | — |
| Epoch Capabilities Index | 133.93 | — |
Math Not comparable
Gemini 2.5 Flash-Lite: 35.5 (#144), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| Omni-MATH | 48% | — |
| LMArena Math | 1373 | — |
Knowledge Not comparable
Gemini 2.5 Flash-Lite: 32.1 (#206), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| MMLU-Pro | 53.7% | — |
| Vectara Hallucination Rate | 3.3% | — |
| GPQA (HELM) | 30.9% | — |
| LMArena Expert | 1373 | — |
Multimodal Not comparable
Gemini 2.5 Flash-Lite: 28.6 (#109), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| LMArena Vision | 1198 | — |
| VPCT | 30% | — |
Multilingual Not comparable
Gemini 2.5 Flash-Lite: 49.5 (#129), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| LMArena Non-English | 1369 | — |
| LMArena Chinese | 1404 | — |
| LMArena French | 1388 | — |
| LMArena German | 1390 | — |
| LMArena Japanese | 1359 | — |
| LMArena Korean | 1358 | — |
| LMArena Russian | 1373 | — |
| LMArena Spanish | 1396 | — |
Instruction Following Not comparable
Gemini 2.5 Flash-Lite: 70.2 (#163), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| IFEval | 81% | — |
| LMArena Instruction Following | 1366 | — |
Long Context Not comparable
Gemini 2.5 Flash-Lite: 33.3 (#257), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| Fiction.LiveBench | 47.2% | — |
| LMArena Longer Query | 1373 | — |
Writing & Preference Not comparable
Gemini 2.5 Flash-Lite: 57.0 (#130), Gemini 3 Deep Think: —
| Benchmark | Gemini 2.5 Flash-Lite | Gemini 3 Deep Think |
|---|---|---|
| LMArena Text | 1379 | — |
| LMArena Creative Writing | 1366 | — |
| WildBench | 81.8% | — |
| LMArena Multi-Turn | 1367 | — |
Frequently asked questions
Is Gemini 2.5 Flash-Lite better than Gemini 3 Deep Think?
Gemini 2.5 Flash-Lite has enough public results to be ranked (#208); Gemini 3 Deep Think does not yet, so treat this comparison as directional.
How many benchmarks do Gemini 2.5 Flash-Lite and Gemini 3 Deep Think share?
0 benchmarks have published results for both models. Gemini 2.5 Flash-Lite has 33 scored results on Noometry and Gemini 3 Deep Think has 3.