Model comparison
Claude Opus 5 vs Gemini 3.5 Flash Lite
Claude Opus 5 is the stronger model overall, scoring 67.8 to 41.5 on the Noometry Index. Gemini 3.5 Flash Lite costs 12× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.
Last verified . 39 shared benchmarks.
GoogleSummary
- They share 39 benchmarks with published results for both. Claude Opus 5 scores higher in 10 categories and Gemini 3.5 Flash Lite in 0 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 5 leads 86.2 to 25.9.
- The biggest single-benchmark swing is ProofBench: 99% for Claude Opus 5 and 13% for Gemini 3.5 Flash Lite.
- Gemini 3.5 Flash Lite is cheaper at $0.30 / $2.50 per million input/output tokens, against $5 / $25 for Claude Opus 5.
- Gemini 3.5 Flash Lite accepts more context: 1.05M tokens versus 1M.
Side by side
| Claude Opus 5 | Gemini 3.5 Flash Lite | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 67.8 | 41.5 |
| Released | 2026-07-24 | 2026-07-21 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1.05M |
| Max output | 128K | 66K |
| Input $ / M tokens | $5 | $0.30 |
| Output $ / M tokens | $25 | $2.50 |
| Results tracked | 57 | 39 |
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Category by category
Coding Claude Opus 5 leads
Claude Opus 5: 67.5 (#5), Gemini 3.5 Flash Lite: 42.4 (#104)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena WebDev | 1691 | 1440 |
| SciCode | 56.4% | 41.3% |
| WeirdML | 91.8% | 39% |
| LMArena Coding | 1534 | 1453 |
| ALE-Bench | 2,165 | 765.27 |
| DeepSWE | 73.6% | — |
| FrontierCode | 53.4% | — |
| CursorBench | 46.6% | — |
| FrontierSWE | 52% | — |
Agentic & Tool Use Claude Opus 5 leads
Claude Opus 5: 55.6 (#1), Gemini 3.5 Flash Lite: 25.7 (#107)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| APEX-Agents | 65.8% | 29.3% |
| GDP.pdf | 24% | 10% |
| 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 3.5 Flash Lite: 27.8 (#114)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| ARC-AGI-2 | 90.4% | 10.3% |
| NYT Connections (extended) | 94.3% | 60.4% |
| ARC-AGI-1 | 97.5% | 53.5% |
| CritPt | 29.1% | 0% |
| Chess Puzzles | 42% | 22% |
| LMArena Hard Prompts | 1526 | 1441 |
| Mystery Game Puzzles | 59% | 19% |
| DTBench | 97.9% | 83.5% |
| LMCA | 64.5% | 37.6% |
| Epoch Capabilities Index | 162.78 | 145.13 |
| 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 3.5 Flash Lite: 25.9 (#264)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| FrontierMath (Tiers 1-3) | 85.6% | 26% |
| FrontierMath Tier 4 | 73.2% | 0% |
| OTIS Mock AIME 2024-2025 | 98.9% | 71.1% |
| ProofBench | 99% | 13% |
| LMArena Math | 1531 | 1433 |
Knowledge Claude Opus 5 leads
Claude Opus 5: 66.8 (#9), Gemini 3.5 Flash Lite: 50.1 (#72)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| GPQA Diamond | 93.9% | 83.3% |
| LMArena Expert | 1557 | 1435 |
| SimpleQA Verified | 59.9% | — |
Multimodal Claude Opus 5 leads
Claude Opus 5: 50.8 (#8), Gemini 3.5 Flash Lite: 41.1 (#40)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Vision | 1319 | 1268 |
| Blueprint-Bench 2 | 30.4% | — |
| Furniture Assembly | 60.8% | — |
| LMArena Document | 1516 | — |
Multilingual Claude Opus 5 leads
Claude Opus 5: 58.8 (#4), Gemini 3.5 Flash Lite: 53.5 (#63)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Non-English | 1501 | 1427 |
| LMArena Chinese | 1574 | 1469 |
| LMArena French | 1519 | 1451 |
| LMArena German | 1524 | 1454 |
| LMArena Japanese | 1516 | 1427 |
| LMArena Korean | 1521 | 1407 |
| LMArena Russian | 1507 | 1443 |
| LMArena Spanish | 1519 | 1442 |
Instruction Following Claude Opus 5 leads
Claude Opus 5: 79.2 (#7), Gemini 3.5 Flash Lite: 74.8 (#85)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Instruction Following | 1517 | 1420 |
Long Context Claude Opus 5 leads
Claude Opus 5: 46.5 (#21), Gemini 3.5 Flash Lite: 43.9 (#84)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Longer Query | 1515 | 1435 |
Writing & Preference Claude Opus 5 leads
Claude Opus 5: 79.2 (#1), Gemini 3.5 Flash Lite: 64.2 (#57)
| Benchmark | Claude Opus 5 | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Text | 1507 | 1435 |
| LMArena Creative Writing | 1491 | 1420 |
| EQ-Bench Creative Writing | 2133 | 1559 |
| LMArena Multi-Turn | 1499 | 1445 |
| EQ-Bench 4 | 1385 | — |
Frequently asked questions
Is Claude Opus 5 better than Gemini 3.5 Flash Lite?
Claude Opus 5 is the stronger model overall, scoring 67.8 to 41.5 on the Noometry Index. Gemini 3.5 Flash Lite costs 12× 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 3.5 Flash Lite?
Gemini 3.5 Flash Lite is cheaper. It lists at $0.30 per million input tokens and $2.50 per million output tokens; Claude Opus 5 lists at $5 and $25.
Is Claude Opus 5 or Gemini 3.5 Flash Lite better for coding?
Claude Opus 5 scores higher on coding benchmarks: 67.5 versus 42.4 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.5 Flash Lite does, with 1.05M tokens against 1M.
How many benchmarks do Claude Opus 5 and Gemini 3.5 Flash Lite share?
39 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and Gemini 3.5 Flash Lite has 39.