Model comparison
Claude Opus 4.5 vs Gemini 1.5 Flash 8B
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 29.9 on the Noometry Index.
Last verified . 20 shared benchmarks.
GoogleSummary
- They share 20 benchmarks with published results for both. Claude Opus 4.5 scores higher in 9 categories and Gemini 1.5 Flash 8B in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.5 leads 56.5 to 16.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 86.1% for Claude Opus 4.5 and 4.6% for Gemini 1.5 Flash 8B.
Side by side
| Claude Opus 4.5 | Gemini 1.5 Flash 8B | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 50.5 | 29.9 |
| Released | 2025-11-01 | 2024-10-03 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | — |
| Max output | 64K | — |
| Input $ / M tokens | $5 | — |
| Output $ / M tokens | $25 | — |
| Results tracked | 69 | 21 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Opus 4.5 leads
Claude Opus 4.5: 54.8 (#27), Gemini 1.5 Flash 8B: 35.5 (#225)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Coding | 1504 | 1218 |
| SWE-bench Verified | 76.7% | — |
| SWE-bench Verified (bash only) | 76.8% | — |
| LMArena WebDev | 1494 | — |
| SWE-bench Multilingual | 70.7% | — |
| GSO | 26.5% | — |
| WeirdML | 63.7% | — |
| ALE-Bench | 1,025 | — |
| AlgoTune | 1.77 | — |
Agentic & Tool Use Not comparable
Claude Opus 4.5: 47.3 (#12), Gemini 1.5 Flash 8B: —
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| Terminal-Bench | 63.1% | — |
| Berkeley Function Calling Leaderboard | 77.5% | — |
| GDPval | 45.5% | — |
| Remote Labor Index | 3.8% | — |
| τ²-bench Airline | 84% | — |
| τ²-bench Banking | 24.7% | — |
| τ²-bench Retail | 79.6% | — |
| τ²-bench Telecom | 92.3% | — |
| Cybench | 82% | — |
| DeepResearch Bench | 54.8% | — |
| OSWorld | 66.3% | — |
| BALROG | 43.5% | — |
| LMArena Search | 1180 | — |
| METR Time Horizons | 75% | — |
| Vending-Bench 2 | 4,967 | — |
Reasoning Claude Opus 4.5 leads
Claude Opus 4.5: 42.6 (#51), Gemini 1.5 Flash 8B: 20.0 (#244)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Hard Prompts | 1476 | 1209 |
| DTBench | 89.9% | 50% |
| ARC-AGI-2 | 37.6% | — |
| SimpleBench | 62% | — |
| Kagi LLM Benchmark | 80.2% | — |
| NYT Connections (extended) | 52.5% | — |
| ARC-AGI-1 | 80% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 11.9% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 22% | — |
| LMCA | 44.5% | — |
| Epoch Capabilities Index | 150.09 | — |
| ForecastBench | 60.7 | — |
Math Claude Opus 4.5 leads
Claude Opus 4.5: 38.6 (#132), Gemini 1.5 Flash 8B: 14.2 (#302)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 86.1% | 4.6% |
| LMArena Math | 1463 | 1207 |
| FrontierMath (Tiers 1-3) | 34.4% | — |
| FrontierMath Tier 4 | 4.9% | — |
| ProofBench | 36% | — |
| FrontierMath (Feb 2025 set) | 20.7% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Opus 4.5 leads
Claude Opus 4.5: 56.5 (#44), Gemini 1.5 Flash 8B: 16.0 (#289)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| GPQA Diamond | 86% | 33% |
| LMArena Expert | 1487 | 1185 |
| Humanity's Last Exam | 25.2% | — |
| SimpleQA Verified | 45.7% | — |
| Vectara Hallucination Rate | 10.9% | — |
Multimodal Claude Opus 4.5 leads
Claude Opus 4.5: 31.4 (#107), Gemini 1.5 Flash 8B: 28.2 (#115)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Vision | — | 1044 |
| GeoBench | 75% | — |
| VPCT | 40% | — |
| Furniture Assembly | 28.3% | — |
| LMArena Document | 1462 | — |
Multilingual Claude Opus 4.5 leads
Claude Opus 4.5: 54.3 (#47), Gemini 1.5 Flash 8B: 38.5 (#229)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Non-English | 1438 | 1215 |
| LMArena Chinese | 1470 | 1231 |
| LMArena French | 1471 | 1234 |
| LMArena German | 1449 | 1206 |
| LMArena Japanese | 1416 | 1150 |
| LMArena Korean | 1424 | 1140 |
| LMArena Russian | 1447 | 1236 |
| LMArena Spanish | 1458 | 1212 |
Instruction Following Claude Opus 4.5 leads
Claude Opus 4.5: 77.5 (#19), Gemini 1.5 Flash 8B: 62.8 (#236)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Instruction Following | 1478 | 1199 |
Long Context Claude Opus 4.5 leads
Claude Opus 4.5: 46.5 (#22), Gemini 1.5 Flash 8B: 37.0 (#225)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Longer Query | 1480 | 1219 |
| CL-bench | 21.1% | — |
Writing & Preference Claude Opus 4.5 leads
Claude Opus 4.5: 68.1 (#28), Gemini 1.5 Flash 8B: 42.8 (#232)
| Benchmark | Claude Opus 4.5 | Gemini 1.5 Flash 8B |
|---|---|---|
| LMArena Text | 1451 | 1226 |
| LMArena Creative Writing | 1445 | 1218 |
| LMArena Multi-Turn | 1466 | 1185 |
| EQ-Bench Creative Writing | 1687 | — |
Frequently asked questions
Is Claude Opus 4.5 better than Gemini 1.5 Flash 8B?
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 29.9 on the Noometry Index.
Is Claude Opus 4.5 or Gemini 1.5 Flash 8B better for coding?
Claude Opus 4.5 scores higher on coding benchmarks: 54.8 versus 35.5 in the Noometry coding category.
How many benchmarks do Claude Opus 4.5 and Gemini 1.5 Flash 8B share?
20 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Gemini 1.5 Flash 8B has 21.