Model comparison
Gemini 2.5 Flash vs Grok-2 (Dec 2024)
Gemini 2.5 Flash is the stronger model overall, scoring 39.0 to 33.4 on the Noometry Index.
Last verified . 25 shared benchmarks.
GoogleSummary
- They share 25 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 8 categories and Grok-2 (Dec 2024) in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 2.5 Flash leads 38.1 to 19.6.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 73.1% for Gemini 2.5 Flash and 11.5% for Grok-2 (Dec 2024).
Side by side
| Gemini 2.5 Flash | Grok-2 (Dec 2024) | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 39.0 | 33.4 |
| Released | 2025-04-17 | 2024-08-13 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.30 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 54 | 34 |
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Category by category
Coding Gemini 2.5 Flash leads
Gemini 2.5 Flash: 35.5 (#210), Grok-2 (Dec 2024): 32.9 (#254)
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| WeirdML | 41.9% | 22.2% |
| LMArena Coding | 1424 | 1288 |
| SWE-bench Verified (bash only) | 28.7% | — |
| Aider Polyglot | 55.1% | — |
| LiveBench Coding | — | 46.4% |
| ALE-Bench | 661.88 | — |
Agentic & Tool Use Not comparable
Gemini 2.5 Flash: 30.6 (#67), Grok-2 (Dec 2024): —
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| Terminal-Bench | 17.1% | — |
| Berkeley Function Calling Leaderboard | 56.2% | — |
| TheAgentCompany | 41.1% | — |
| BALROG | 33.5% | — |
| Vending-Bench 2 | 548.84 | — |
Reasoning Gemini 2.5 Flash leads
Gemini 2.5 Flash: 18.2 (#271), Grok-2 (Dec 2024): 16.4 (#294)
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| SimpleBench | 41.2% | 22.7% |
| LMArena Hard Prompts | 1422 | 1272 |
| DTBench | 76.5% | 65.2% |
| Epoch Capabilities Index | 143.04 | 130.48 |
| ARC-AGI-2 | 2.5% | — |
| Kagi LLM Benchmark | 56.8% | — |
| ARC-AGI-1 | 33.3% | — |
| CritPt | 1.1% | — |
| EnigmaEval | 2.7% | — |
| LiveBench Reasoning | — | 54.8% |
| LiveBench Data Analysis | — | 54.5% |
| LMCA | 27.5% | — |
| ForecastBench | 60.6 | — |
| LiveBench | — | 54.3% |
Math Gemini 2.5 Flash leads
Gemini 2.5 Flash: 38.1 (#87), Grok-2 (Dec 2024): 19.6 (#278)
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 73.1% | 11.5% |
| LMArena Math | 1415 | 1283 |
| FrontierMath (Feb 2025 set) | 4.8% | 0.7% |
| Omni-MATH | 38.5% | — |
| LiveBench Math | — | 54.9% |
| MATH Level 5 | — | 63.5% |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Gemini 2.5 Flash leads
Gemini 2.5 Flash: 36.1 (#162), Grok-2 (Dec 2024): 29.8 (#225)
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| Confabulations | 16.8% | 20.1% |
| LMArena Expert | 1426 | 1254 |
| GPQA Diamond | — | 53.8% |
| Humanity's Last Exam | 12.1% | — |
| MMLU-Pro | 63.9% | — |
| Vectara Hallucination Rate | 7.8% | — |
| GPQA (HELM) | 39% | — |
Multimodal Not comparable
Gemini 2.5 Flash: 41.2 (#31), Grok-2 (Dec 2024): —
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Vision | 1254 | — |
| GeoBench | 76% | — |
| VPCT | 46.2% | — |
| SpatialViz-Bench | 36.9% | — |
Multilingual Gemini 2.5 Flash leads
Gemini 2.5 Flash: 52.5 (#83), Grok-2 (Dec 2024): 43.3 (#183)
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Non-English | 1410 | 1282 |
| LMArena Chinese | 1450 | 1289 |
| LMArena French | 1433 | 1317 |
| LMArena German | 1419 | 1287 |
| LMArena Japanese | 1403 | 1244 |
| LMArena Korean | 1385 | 1237 |
| LMArena Russian | 1415 | 1286 |
| LMArena Spanish | 1421 | 1281 |
Instruction Following Gemini 2.5 Flash leads
Gemini 2.5 Flash: 75.9 (#50), Grok-2 (Dec 2024): 67.1 (#197)
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Instruction Following | 1405 | 1270 |
| LiveBench Instruction Following | — | 69.6% |
| IFEval | 89.8% | — |
Long Context Gemini 2.5 Flash leads
Gemini 2.5 Flash: 47.5 (#16), Grok-2 (Dec 2024): 38.7 (#186)
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Longer Query | 1419 | 1276 |
| Fiction.LiveBench | 77.8% | — |
Writing & Preference Gemini 2.5 Flash leads
Gemini 2.5 Flash: 54.0 (#153), Grok-2 (Dec 2024): 48.8 (#192)
| Benchmark | Gemini 2.5 Flash | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Text | 1417 | 1305 |
| LMArena Creative Writing | 1400 | 1284 |
| Short-Story Creative Writing | 76.5% | 63.6% |
| LMArena Multi-Turn | 1408 | 1290 |
| EQ-Bench Creative Writing | 1137 | — |
| WildBench | 81.7% | — |
| LiveBench Language | — | 45.6% |
Frequently asked questions
Is Gemini 2.5 Flash better than Grok-2 (Dec 2024)?
Gemini 2.5 Flash is the stronger model overall, scoring 39.0 to 33.4 on the Noometry Index.
Is Gemini 2.5 Flash or Grok-2 (Dec 2024) better for coding?
Gemini 2.5 Flash scores higher on coding benchmarks: 35.5 versus 32.9 in the Noometry coding category.
How many benchmarks do Gemini 2.5 Flash and Grok-2 (Dec 2024) share?
25 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and Grok-2 (Dec 2024) has 34.