Model comparison
Claude 3.5 Sonnet vs Gemini 3.5 Flash-Lite
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude 3.5 Sonnet #132 (Estimated); Gemini 3.5 Flash-Lite unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude 3.5 Sonnet and Gemini 3.5 Flash-Lite share 0 comparable benchmark results. 1 of 8 categories are comparable. 4 results are unique to Claude 3.5 Sonnet; 21 to Gemini 3.5 Flash-Lite.
Updated July 21, 2026- Shared results
- 0
- Claude 3.5 Sonnet only
- 4
- Gemini 3.5 Flash-Lite only
- 21
- Comparable categories
- 1 / 8
Treat this as a split decision. Claude 3.5 Sonnet makes more sense if you would rather avoid the extra latency and token burn of a reasoning model; Gemini 3.5 Flash-Lite is the better fit if coding is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 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 3.5 Sonnet and Gemini 3.5 Flash-Lite finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Claude 3.5 Sonnet is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $0.30 input / $2.50 output per 1M tokens for Gemini 3.5 Flash-Lite. That is roughly 6.0x on output cost alone. Gemini 3.5 Flash-Lite is the reasoning model in the pair, while Claude 3.5 Sonnet 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. Gemini 3.5 Flash-Lite gives you the larger context window at 1M, compared with 200K for Claude 3.5 Sonnet.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude 3.5 Sonnet | Gemini 3.5 Flash-Lite | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude 3.5 Sonnet$3 input / $15 output | Gemini 3.5 Flash-Lite$0.3 input / $2.5 output | Gemini 3.5 Flash-Lite has the lower combined listed price. |
| Generation speedtokens per second | Claude 3.5 SonnetNot available | Gemini 3.5 Flash-LiteNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude 3.5 SonnetNot available | Gemini 3.5 Flash-LiteNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude 3.5 Sonnet200K | Gemini 3.5 Flash-Lite1M | Gemini 3.5 Flash-Lite lists the larger context window. |
Benchmark Deep Dive
Agentic7 benchmarks
| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash-Lite | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | — | 54% | Not comparable |
| OSWorld-VerifiedSource | — | 74% | Not comparable |
| GDPval-AASource | — | 1140 | Not comparable |
| AA Agentic IndexSource | — | 26.8% | Not comparable |
| GDPval-AASource | — | 32.0% | Not comparable |
| AA BriefcaseSource | — | 634 | Not comparable |
| AA Tau3 BankingSource | — | 16.5% | Not comparable |
CodingGemini 3.5 Flash-Lite wins5 benchmarks
Reasoning3 benchmarks
Knowledge7 benchmarks
| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash-Lite | Result |
|---|---|---|---|
| GPQASource | 59.4% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 36.5% | Not comparable |
| AA-GPQA DiamondSource | — | 83.8% | Not comparable |
| AA-HLESource | — | 17.5% | Not comparable |
| AA-Omniscience IndexSource | — | 6.9% | Not comparable |
| AA-Omniscience AccuracySource | — | 30.3% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 33.5% | Not comparable |
Math2 benchmarks
Multimodal1 benchmarks
| Benchmark | Claude 3.5 Sonnet | Gemini 3.5 Flash-Lite | Result |
|---|---|---|---|
| AA-MMMU-ProSource | — | 79.0% | Not comparable |
Frequently Asked Questions (2)
Which is better, Claude 3.5 Sonnet or Gemini 3.5 Flash-Lite?
Claude 3.5 Sonnet and Gemini 3.5 Flash-Lite are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for coding, Claude 3.5 Sonnet or Gemini 3.5 Flash-Lite?
Gemini 3.5 Flash-Lite has the edge for coding in this comparison, averaging 54.2 versus 49. Claude 3.5 Sonnet stays close enough that the answer can still flip depending on your workload.
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