Model comparison
Claude Opus 5 vs Gemini 3.1 Flash-Lite
Head-to-head evidence from 14 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Opus 5 #1 (Estimated); Gemini 3.1 Flash-Lite #114 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Opus 5 and Gemini 3.1 Flash-Lite share 14 comparable benchmark results. 1 of 8 categories are comparable. 65 results are unique to Claude Opus 5; 6 to Gemini 3.1 Flash-Lite.
Updated July 24, 2026- Shared results
- 14
- Claude Opus 5 only
- 65
- Gemini 3.1 Flash-Lite only
- 6
- Comparable categories
- 1 / 8
Pick Claude Opus 5 if you want the stronger benchmark profile. Gemini 3.1 Flash-Lite only becomes the better choice if multimodal & grounded is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 14 shared benchmark results across 5 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Opus 5 is clearly ahead on the BenchAlign aggregate, 85.88 to 50.24. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Opus 5 is also the more expensive model on tokens at $5.00 input / $25.00 output per 1M tokens, versus $0.25 input / $1.50 output per 1M tokens for Gemini 3.1 Flash-Lite. That is roughly 16.7x on output cost alone. Claude Opus 5 is the reasoning model in the pair, while Gemini 3.1 Flash-Lite is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Opus 5 | Δ | Gemini 3.1 Flash-Lite |
|---|---|---|---|
| Multimodal | Claude Opus 566.9 | Margin→ 6.3 | Gemini 3.1 Flash-Lite73.2 |
| Agentic | Claude Opus 590.8 | MarginNo overlap | Gemini 3.1 Flash-LiteNot measured |
| Coding | Claude Opus 589.5 | MarginNo overlap | Gemini 3.1 Flash-LiteNot measured |
| Reasoning | Claude Opus 590.4 | MarginNo overlap | Gemini 3.1 Flash-LiteNot measured |
| Knowledge | Claude Opus 564.7 | MarginNo overlap | Gemini 3.1 Flash-LiteNot measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Opus 5 | Gemini 3.1 Flash-Lite | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Opus 5$5 input / $25 output | Gemini 3.1 Flash-Lite$0.25 input / $1.5 output | Gemini 3.1 Flash-Lite has the lower combined listed price. |
| Generation speedtokens per second | Claude Opus 5Not available | Gemini 3.1 Flash-Lite205 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Opus 5Not available | Gemini 3.1 Flash-Lite7.50 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Opus 5Not available | Gemini 3.1 Flash-Lite1M | A complete context comparison is not available. |
Benchmark Deep Dive
Agentic27 benchmarks
| Benchmark | Claude Opus 5 | Gemini 3.1 Flash-Lite | Result |
|---|---|---|---|
| FrontierBench v0.1Source | 43.3% | — | Not comparable |
| BrowseCompSource | 90.8% | — | Not comparable |
| HLE w/ toolsSource | 64.7% | — | Not comparable |
| DeepSearchQASource | 95.0% | — | Not comparable |
| DRACOSource | 88.6% | — | Not comparable |
| BrowseComp (10-agent, prerelease)Source | 93.6% | — | Not comparable |
| OSWorld 2.0Source | 70.6% | — | Not comparable |
| MCP AtlasSource | 85.8% | — | Not comparable |
| MCP-Atlas claim coverageSource | 89.1% | — | Not comparable |
| LAB all-pass (Anthropic harness)Source | 23.58% | — | Not comparable |
| LAB criterion-pass (Anthropic harness)Source | 93.74% | — | Not comparable |
| LAB all-pass (Harvey held-out)Source | 11.7% | — | Not comparable |
| LAB criterion-pass (Harvey held-out)Source | 94.1% | — | Not comparable |
| GDPval-AASource | 1861 | 649 | Claude Opus 5 leads |
| Toolathlon-VerifiedSource | 80.6% | — | Not comparable |
| Toolathlon Verified Pass@3Source | 87.0% | — | Not comparable |
| Toolathlon Verified Pass³Source | 73.1% | — | Not comparable |
| Toolathlon Verified avg. turnsSource | 23.5 turns | — | Not comparable |
| AutomationBenchSource | 26.0% | — | Not comparable |
| AA Agentic IndexSource | 55.3% | 6.2% | Claude Opus 5 leads |
| GDPval-AASource | 68.0% | 7.4% | Claude Opus 5 leads |
| AA Tau3 BankingSource | 30.3% | — | Not comparable |
| AA BriefcaseSource | 1720 | — | Not comparable |
| aaTerminalBench21Source | 89.1% | — | Not comparable |
| APEX-Agents-AASource | — | 12.2% | Not comparable |
| τ²-bench resultsSource | — | 31.3% | Not comparable |
| Gert LabsSource | — | 38.46% | Not comparable |
Coding13 benchmarks
| Benchmark | Claude Opus 5 | Gemini 3.1 Flash-Lite | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 96% | — | Not comparable |
| SWE-bench ProSource | 79.2% | — | Not comparable |
| SWE MultilingualSource | 89.5% | — | Not comparable |
| SWE MultimodalSource | 59.4% | — | Not comparable |
| deepSweSource | 68.8% | — | Not comparable |
| FrontierCode 1.1 MainSource | 53.4% | — | Not comparable |
| FrontierCode 1.1 ExtendedSource | 63.6% | — | Not comparable |
| ProgramBench (episode 1)Source | 83.0% | — | Not comparable |
| ProgramBenchSource | 93.0% | — | Not comparable |
| cursorBench32Source | 70.0% | — | Not comparable |
| AA Coding IndexSource | 78.0% | 34.7% | Claude Opus 5 leads |
| AA-SciCodeSource | 55.7% | 41.9% | Claude Opus 5 leads |
| Vibe Code BenchSource | — | 0.00% | Not comparable |
Reasoning5 benchmarks
Knowledge21 benchmarks
| Benchmark | Claude Opus 5 | Gemini 3.1 Flash-Lite | Result |
|---|---|---|---|
| HLESource | 64.7% | — | Not comparable |
| HLE w/o toolsSource | 56.3% | — | Not comparable |
| HealthBench (raw)Source | 67.1% | — | Not comparable |
| HealthBench (length-adjusted)Source | 57.8% | — | Not comparable |
| HealthBench ProfessionalSource | 59.8% | — | Not comparable |
| HealthBench Professional (raw)Source | 73.4% | — | Not comparable |
| BioMysteryBench (human-solvable)Source | 90.1% | — | Not comparable |
| BioMysteryBench (human-difficult)Source | 49.4% | — | Not comparable |
| SpatialBench VerifiedSource | 72.5% | — | Not comparable |
| SingleCellBenchSource | 60.6% | — | Not comparable |
| ProteinGym HardSource | 47.7% | — | Not comparable |
| Protein DesignSource | 42.5% | — | Not comparable |
| Organic chemistry V2Source | 61.6% | — | Not comparable |
| Protocols (troubleshooting)Source | 61.1% | — | Not comparable |
| Protocols (understanding)Source | 78.4% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 60.7% | 25.0% | Claude Opus 5 leads |
| AA-GPQA DiamondSource | 93.2% | 82.2% | Claude Opus 5 leads |
| AA-HLESource | 52.6% | 16.2% | Claude Opus 5 leads |
| AA-Omniscience IndexSource | 31.3% | -15.5% | Claude Opus 5 leads |
| AA-Omniscience AccuracySource | 54.2% | 36.4% | Claude Opus 5 leads |
| AA-Omniscience Hallucination RateSource | 50.1% | 81.6% | Claude Opus 5 leads |
Math5 benchmarks
Multilingual3 benchmarks
MultimodalGemini 3.1 Flash-Lite wins10 benchmarks
| Benchmark | Claude Opus 5 | Gemini 3.1 Flash-Lite | Result |
|---|---|---|---|
| Chartography (no tools)Source | 29.6% | — | Not comparable |
| Chartography (tools)Source | 83.0% | — | Not comparable |
| BenchCAD Vision2Code (no tools)Source | 0.366 | — | Not comparable |
| BenchCAD Vision2Code (tools)Source | 0.821 | — | Not comparable |
| GDP.pdf (no tools)Source | 83.4% | — | Not comparable |
| GDP.pdf (tools)Source | 85.5% | — | Not comparable |
| OfficeQASource | 78.1% | — | Not comparable |
| OfficeQA ProSource | 66.9% | — | Not comparable |
| AA-MMMU-ProSource | 84.7% | 75.5% | Claude Opus 5 leads |
| CharXivSource | — | 73.2% | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Claude Opus 5 | Gemini 3.1 Flash-Lite | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 77.2% | Not comparable |
Frequently Asked Questions (2)
Which is better, Claude Opus 5 or Gemini 3.1 Flash-Lite?
Claude Opus 5 is ahead on BenchLM's BenchAlign leaderboard, 85.88 to 50.24.
Which is better for multimodal and grounded tasks, Claude Opus 5 or Gemini 3.1 Flash-Lite?
Gemini 3.1 Flash-Lite has the edge for multimodal and grounded tasks in this comparison, averaging 73.2 versus 66.9. Inside this category, AA-MMMU-Pro is the benchmark that creates the most daylight between them.