Model comparison
Gemini 2.5 Flash vs Gemini 4 Argon
Gemini 4 Argon is the stronger model overall, scoring 56.5 to 39.3 on the Noometry Index.
Last verified . 15 shared benchmarks.
GoogleSummary
- They share 15 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 0 categories and Gemini 4 Argon in 10 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 4 Argon leads 73.9 to 39.9.
- The biggest single-benchmark swing is CritPt: 1.1% for Gemini 2.5 Flash and 27.1% for Gemini 4 Argon.
Side by side
| Gemini 2.5 Flash | Gemini 4 Argon | |
|---|---|---|
| Provider | ||
| Noometry Index | 39.3 | 56.5 |
| Released | 2025-04-17 | 2026-09-30 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.30 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 54 | 21 |
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Category by category
Coding Gemini 4 Argon leads
Gemini 2.5 Flash: 35.8 (#220), Gemini 4 Argon: 62.0 (#9)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| LMArena Coding | 1424 | 1550 |
| SWE-bench Verified (bash only) | 28.7% | — |
| Aider Polyglot | 55.1% | — |
| LMArena WebDev | — | 1678 |
| FrontierSWE | — | 55% |
| SciCode | — | 61.8% |
| WeirdML | 41.9% | — |
| ALE-Bench | 661.88 | — |
Agentic & Tool Use Gemini 4 Argon leads
Gemini 2.5 Flash: 30.8 (#74), Gemini 4 Argon: 49.2 (#8)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| Vending-Bench 2 | 548.84 | 13,718 |
| Terminal-Bench | 17.1% | — |
| APEX-Agents | — | 82.2% |
| Berkeley Function Calling Leaderboard | 56.2% | — |
| TheAgentCompany | 41.1% | — |
| BALROG | 33.5% | — |
Reasoning Gemini 4 Argon leads
Gemini 2.5 Flash: 18.1 (#286), Gemini 4 Argon: 44.2 (#47)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| CritPt | 1.1% | 27.1% |
| LMArena Hard Prompts | 1422 | 1548 |
| ARC-AGI-2 | 2.5% | — |
| SimpleBench | 41.2% | — |
| Kagi LLM Benchmark | 56.8% | — |
| ARC-AGI-1 | 33.3% | — |
| EnigmaEval | 2.7% | — |
| DTBench | 76.5% | — |
| LMCA | 27.5% | — |
| Epoch Capabilities Index | 143.03 | — |
| ForecastBench | 60.6 | — |
Math Gemini 4 Argon leads
Gemini 2.5 Flash: 39.9 (#98), Gemini 4 Argon: 73.9 (#17)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| LMArena Math | 1415 | 1536 |
| OTIS Mock AIME 2024-2025 | 73.1% | — |
| ProofBench | — | 99% |
| Omni-MATH | 38.5% | — |
| FrontierMath (Feb 2025 set) | 4.8% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Gemini 4 Argon leads
Gemini 2.5 Flash: 36.4 (#168), Gemini 4 Argon: 43.9 (#89)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| LMArena Expert | 1426 | 1553 |
| Humanity's Last Exam | 12.1% | — |
| MMLU-Pro | 63.9% | — |
| Confabulations | 16.8% | — |
| Vectara Hallucination Rate | 7.8% | — |
| GPQA (HELM) | 39% | — |
Multimodal Gemini 4 Argon leads
Gemini 2.5 Flash: 41.8 (#32), Gemini 4 Argon: 46.5 (#14)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| LMArena Vision | 1253 | — |
| GeoBench | 76% | — |
| VPCT | 46.2% | — |
| Blueprint-Bench 2 | — | 54.4% |
| SpatialViz-Bench | 36.9% | — |
Multilingual Gemini 4 Argon leads
Gemini 2.5 Flash: 52.3 (#88), Gemini 4 Argon: 60.3 (#1)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| LMArena Non-English | 1409 | 1523 |
| LMArena Chinese | 1450 | 1610 |
| LMArena Russian | 1415 | 1537 |
| LMArena Spanish | 1421 | 1497 |
| LMArena French | 1433 | — |
| LMArena German | 1418 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1385 | — |
Instruction Following Gemini 4 Argon leads
Gemini 2.5 Flash: 75.7 (#54), Gemini 4 Argon: 80.1 (#2)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| LMArena Instruction Following | 1405 | 1538 |
| IFEval | 89.8% | — |
Long Context Too close to call
Gemini 2.5 Flash: 47.5 (#17), Gemini 4 Argon: 47.6 (#15)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| LMArena Longer Query | 1419 | 1549 |
| Fiction.LiveBench | 77.8% | — |
Writing & Preference Gemini 4 Argon leads
Gemini 2.5 Flash: 53.8 (#157), Gemini 4 Argon: 71.4 (#19)
| Benchmark | Gemini 2.5 Flash | Gemini 4 Argon |
|---|---|---|
| LMArena Text | 1417 | 1534 |
| LMArena Creative Writing | 1400 | 1531 |
| LMArena Multi-Turn | 1408 | 1557 |
| Short-Story Creative Writing | 76.5% | — |
| EQ-Bench Creative Writing | 1137 | — |
| WildBench | 81.7% | — |
Frequently asked questions
Is Gemini 2.5 Flash better than Gemini 4 Argon?
Gemini 4 Argon is the stronger model overall, scoring 56.5 to 39.3 on the Noometry Index.
Is Gemini 2.5 Flash or Gemini 4 Argon better for coding?
Gemini 4 Argon scores higher on coding benchmarks: 62.0 versus 35.8 in the Noometry coding category.
How many benchmarks do Gemini 2.5 Flash and Gemini 4 Argon share?
15 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and Gemini 4 Argon has 21.