Model comparison
Claude Opus 5 vs Gemini 3.6 Flash
Claude Opus 5 is the stronger model overall, scoring 67.8 to 54.1 on the Noometry Index. Gemini 3.6 Flash costs 6.7× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.
Last verified . 45 shared benchmarks.
GoogleSummary
- They share 45 benchmarks with published results for both. Claude Opus 5 scores higher in 9 categories and Gemini 3.6 Flash in 1 category; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 5 leads 86.2 to 57.3.
- The biggest single-benchmark swing is ProofBench: 99% for Claude Opus 5 and 36% for Gemini 3.6 Flash.
- Gemini 3.6 Flash is cheaper at $0.75 / $3.75 per million input/output tokens, against $5 / $25 for Claude Opus 5.
- Gemini 3.6 Flash accepts more context: 1.05M tokens versus 1M.
Side by side
| Claude Opus 5 | Gemini 3.6 Flash | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 67.8 | 54.1 |
| Released | 2026-07-24 | 2026-07-21 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1.05M |
| Max output | 128K | 66K |
| Input $ / M tokens | $5 | $0.75 |
| Output $ / M tokens | $25 | $3.75 |
| Results tracked | 57 | 46 |
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Category by category
Coding Claude Opus 5 leads
Claude Opus 5: 67.5 (#5), Gemini 3.6 Flash: 50.0 (#48)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| DeepSWE | 73.6% | 46.7% |
| FrontierCode | 53.4% | 34.4% |
| LMArena WebDev | 1691 | 1538 |
| SciCode | 56.4% | 52.7% |
| WeirdML | 91.8% | 56.1% |
| LMArena Coding | 1534 | 1491 |
| ALE-Bench | 2,165 | 715.52 |
| CursorBench | 46.6% | — |
| FrontierSWE | 52% | — |
Agentic & Tool Use Claude Opus 5 leads
Claude Opus 5: 55.6 (#1), Gemini 3.6 Flash: 32.3 (#65)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| APEX-Agents | 65.8% | 46.9% |
| GDP.pdf | 24% | 14% |
| OSWorld 2.0 | 31.4% | — |
| τ²-bench Banking | 48.7% | — |
| PostTrainBench | 35% | — |
| BALROG | 63.4% | — |
| GBAEval | 79.6% | — |
| Vending-Bench 2 | 11,182 | — |
Reasoning Claude Opus 5 leads
Claude Opus 5: 77.2 (#4), Gemini 3.6 Flash: 58.8 (#22)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| ARC-AGI-2 | 90.4% | 60.4% |
| NYT Connections (extended) | 94.3% | 89% |
| ARC-AGI-1 | 97.5% | 91.2% |
| CritPt | 29.1% | 10.6% |
| Chess Puzzles | 42% | 43% |
| LMArena Hard Prompts | 1526 | 1485 |
| Mystery Game Puzzles | 59% | 30% |
| DTBench | 97.9% | 95.5% |
| LMCA | 64.5% | 44.9% |
| Epoch Capabilities Index | 162.78 | 154.25 |
| SimpleBench | 80.6% | — |
| EBR-Bench | 45.7% | — |
| Bench to the Future 3 | 0.12 | — |
Math Claude Opus 5 leads
Claude Opus 5: 86.2 (#8), Gemini 3.6 Flash: 57.3 (#40)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | 85.6% | 58.9% |
| FrontierMath Tier 4 | 73.2% | 22% |
| OTIS Mock AIME 2024-2025 | 98.9% | 94.2% |
| ProofBench | 99% | 36% |
| LMArena Math | 1531 | 1505 |
| MathArena Final-Answer Competitions | — | 70.8% |
Knowledge Gemini 3.6 Flash leads
Claude Opus 5: 66.8 (#9), Gemini 3.6 Flash: 67.8 (#8)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| GPQA Diamond | 93.9% | 94.1% |
| SimpleQA Verified | 59.9% | 66.2% |
| LMArena Expert | 1557 | 1488 |
Multimodal Claude Opus 5 leads
Claude Opus 5: 50.8 (#8), Gemini 3.6 Flash: 38.5 (#64)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| LMArena Vision | 1319 | 1298 |
| Blueprint-Bench 2 | 30.4% | 31.2% |
| Furniture Assembly | 60.8% | 23.3% |
| LMArena Document | 1516 | 1456 |
Multilingual Claude Opus 5 leads
Claude Opus 5: 58.8 (#4), Gemini 3.6 Flash: 56.5 (#19)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| LMArena Non-English | 1501 | 1469 |
| LMArena Chinese | 1574 | 1531 |
| LMArena French | 1519 | 1504 |
| LMArena German | 1524 | 1478 |
| LMArena Japanese | 1516 | 1476 |
| LMArena Korean | 1521 | 1431 |
| LMArena Russian | 1507 | 1487 |
| LMArena Spanish | 1519 | 1475 |
Instruction Following Claude Opus 5 leads
Claude Opus 5: 79.2 (#7), Gemini 3.6 Flash: 77.0 (#33)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| LMArena Instruction Following | 1517 | 1466 |
Long Context Claude Opus 5 leads
Claude Opus 5: 46.5 (#21), Gemini 3.6 Flash: 45.1 (#50)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| LMArena Longer Query | 1515 | 1474 |
Writing & Preference Claude Opus 5 leads
Claude Opus 5: 79.2 (#1), Gemini 3.6 Flash: 68.2 (#27)
| Benchmark | Claude Opus 5 | Gemini 3.6 Flash |
|---|---|---|
| LMArena Text | 1507 | 1479 |
| LMArena Creative Writing | 1491 | 1465 |
| EQ-Bench Creative Writing | 2133 | 1604 |
| LMArena Multi-Turn | 1499 | 1481 |
| EQ-Bench 4 | 1385 | — |
Frequently asked questions
Is Claude Opus 5 better than Gemini 3.6 Flash?
Claude Opus 5 is the stronger model overall, scoring 67.8 to 54.1 on the Noometry Index. Gemini 3.6 Flash costs 6.7× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.
Which is cheaper, Claude Opus 5 or Gemini 3.6 Flash?
Gemini 3.6 Flash is cheaper. It lists at $0.75 per million input tokens and $3.75 per million output tokens; Claude Opus 5 lists at $5 and $25.
Is Claude Opus 5 or Gemini 3.6 Flash better for coding?
Claude Opus 5 scores higher on coding benchmarks: 67.5 versus 50.0 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.6 Flash does, with 1.05M tokens against 1M.
How many benchmarks do Claude Opus 5 and Gemini 3.6 Flash share?
45 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and Gemini 3.6 Flash has 46.