Model comparison
Claude Opus 4.1 vs Gemini 3.5 Flash
Gemini 3.5 Flash is the stronger model overall, scoring 54.2 to 41.0 on the Noometry Index.
Last verified . 36 shared benchmarks.
GoogleSummary
- They share 36 benchmarks with published results for both. Claude Opus 4.1 scores higher in 1 category and Gemini 3.5 Flash in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 3.5 Flash leads 60.7 to 22.3.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 12.6% for Claude Opus 4.1 and 62.8% for Gemini 3.5 Flash.
- Gemini 3.5 Flash is cheaper at $1.50 / $9 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.
- Gemini 3.5 Flash accepts more context: 1.05M tokens versus 200K.
Side by side
| Claude Opus 4.1 | Gemini 3.5 Flash | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 41.0 | 54.2 |
| Released | 2025-08-05 | 2026-05-19 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 1.05M |
| Max output | 32K | 66K |
| Input $ / M tokens | $15 | $1.50 |
| Output $ / M tokens | $75 | $9 |
| Results tracked | 48 | 54 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Gemini 3.5 Flash leads
Claude Opus 4.1: 44.4 (#73), Gemini 3.5 Flash: 49.4 (#49)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| SWE-bench Verified | 73.3% | 79.3% |
| LMArena WebDev | 1390 | 1499 |
| WeirdML | 45.9% | 62.6% |
| LMArena Coding | 1479 | 1492 |
| ALE-Bench | 674.77 | 911.02 |
| DeepSWE | — | 37.4% |
| SciCode | — | 53.1% |
| AlgoTune | 1.34 | — |
Agentic & Tool Use Claude Opus 4.1 leads
Claude Opus 4.1: 35.0 (#41), Gemini 3.5 Flash: 24.7 (#114)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| Terminal-Bench | 38% | — |
| APEX-Agents | — | 27.5% |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| GBAEval | — | 6.7% |
| GDP.pdf | — | 14% |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |
| Vending-Bench 2 | — | 5,396 |
Reasoning Gemini 3.5 Flash leads
Claude Opus 4.1: 32.2 (#76), Gemini 3.5 Flash: 62.8 (#18)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| SimpleBench | 60% | 76.7% |
| Chess Puzzles | 7% | 50% |
| EnigmaEval | 7.2% | 25.4% |
| EBR-Bench | 7.9% | 4.8% |
| LMArena Hard Prompts | 1443 | 1488 |
| Mystery Game Puzzles | 21% | 32% |
| DTBench | 80% | 94.7% |
| LMCA | 37.1% | 47.1% |
| Epoch Capabilities Index | 144.12 | 154.46 |
| ForecastBench | 62 | 59 |
| ARC-AGI-2 | — | 72.1% |
| NYT Connections (extended) | — | 92.6% |
| ARC-AGI-1 | — | 92.5% |
| CritPt | — | 13.1% |
| Surface Evolver Bench | — | 58.1% |
Math Gemini 3.5 Flash leads
Claude Opus 4.1: 22.3 (#277), Gemini 3.5 Flash: 60.7 (#36)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | 12.6% | 62.8% |
| FrontierMath Tier 4 | 2.4% | 26.8% |
| OTIS Mock AIME 2024-2025 | 68.9% | 95.6% |
| LMArena Math | 1431 | 1504 |
| FrontierMath (Feb 2025 set) | 7.2% | 39% |
| FrontierMath Tier 4 (v1) | 4.2% | 14.6% |
| MathArena Final-Answer Competitions | — | 76.3% |
| ProofBench | — | 31% |
Knowledge Gemini 3.5 Flash leads
Claude Opus 4.1: 42.0 (#101), Gemini 3.5 Flash: 66.3 (#11)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| GPQA Diamond | 77.3% | 92.8% |
| LMArena Expert | 1439 | 1495 |
| Humanity's Last Exam | 11.5% | — |
| SimpleQA Verified | — | 66.2% |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |
Multimodal Gemini 3.5 Flash leads
Claude Opus 4.1: 26.8 (#119), Gemini 3.5 Flash: 45.7 (#15)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| LMArena Vision | — | 1310 |
| VPCT | 35% | — |
| Blueprint-Bench 2 | — | 33.6% |
| LMArena Document | — | 1463 |
Multilingual Gemini 3.5 Flash leads
Claude Opus 4.1: 52.0 (#95), Gemini 3.5 Flash: 57.0 (#13)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1405 | 1476 |
| LMArena Chinese | 1427 | 1526 |
| LMArena French | 1431 | 1490 |
| LMArena German | 1413 | 1492 |
| LMArena Japanese | 1378 | 1486 |
| LMArena Korean | 1380 | 1451 |
| LMArena Russian | 1422 | 1493 |
| LMArena Spanish | 1448 | 1480 |
Instruction Following Gemini 3.5 Flash leads
Claude Opus 4.1: 75.6 (#58), Gemini 3.5 Flash: 77.0 (#30)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1435 | 1467 |
Long Context Too close to call
Claude Opus 4.1: 44.5 (#63), Gemini 3.5 Flash: 45.4 (#38)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1455 | 1482 |
Writing & Preference Gemini 3.5 Flash leads
Claude Opus 4.1: 62.4 (#74), Gemini 3.5 Flash: 65.5 (#47)
| Benchmark | Claude Opus 4.1 | Gemini 3.5 Flash |
|---|---|---|
| LMArena Text | 1419 | 1482 |
| LMArena Creative Writing | 1412 | 1470 |
| LMArena Multi-Turn | 1444 | 1481 |
| Short-Story Creative Writing | 84.7% | — |
| EQ-Bench 4 | — | 1087 |
Frequently asked questions
Is Claude Opus 4.1 better than Gemini 3.5 Flash?
Gemini 3.5 Flash is the stronger model overall, scoring 54.2 to 41.0 on the Noometry Index.
Which is cheaper, Claude Opus 4.1 or Gemini 3.5 Flash?
Gemini 3.5 Flash is cheaper. It lists at $1.50 per million input tokens and $9 per million output tokens; Claude Opus 4.1 lists at $15 and $75.
Is Claude Opus 4.1 or Gemini 3.5 Flash better for coding?
Gemini 3.5 Flash scores higher on coding benchmarks: 49.4 versus 44.4 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.5 Flash does, with 1.05M tokens against 200K.
How many benchmarks do Claude Opus 4.1 and Gemini 3.5 Flash share?
36 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Gemini 3.5 Flash has 54.