Model comparison
Gemini 3.5 Flash-Lite vs Kimi K2.5 (Reasoning)
Head-to-head evidence from 15 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Gemini 3.5 Flash-Lite unranked (Not scored); Kimi K2.5 (Reasoning) #57 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemini 3.5 Flash-Lite and Kimi K2.5 (Reasoning) share 15 comparable benchmark results. 2 of 8 categories are comparable. 6 results are unique to Gemini 3.5 Flash-Lite; 12 to Kimi K2.5 (Reasoning).
Updated July 21, 2026- Shared results
- 15
- Gemini 3.5 Flash-Lite only
- 6
- Kimi K2.5 (Reasoning) only
- 12
- Comparable categories
- 2 / 8
Treat this as a split decision. Gemini 3.5 Flash-Lite makes more sense if agentic is the priority or you want the cheaper token bill; Kimi K2.5 (Reasoning) is the better fit if coding is the priority.
Confidence note. This is a partial-evidence comparison with 15 shared benchmark results across 5 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Gemini 3.5 Flash-Lite and Kimi K2.5 (Reasoning) 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.
Kimi K2.5 (Reasoning) is also the more expensive model on tokens at $0.60 input / $3.00 output per 1M tokens, versus $0.30 input / $2.50 output per 1M tokens for Gemini 3.5 Flash-Lite. Gemini 3.5 Flash-Lite gives you the larger context window at 1M, compared with 128K for Kimi K2.5 (Reasoning).
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 | Gemini 3.5 Flash-Lite | Δ | Kimi K2.5 (Reasoning) |
|---|---|---|---|
| Coding | Gemini 3.5 Flash-Lite54.2 | Margin→ 22.6 | Kimi K2.5 (Reasoning)76.8 |
| Agentic | Gemini 3.5 Flash-Lite63.4 | Margin← 8.4 | Kimi K2.5 (Reasoning)55.0 |
| Reasoning | Gemini 3.5 Flash-Lite72.2 | MarginNo overlap | Kimi K2.5 (Reasoning)Not measured |
| Knowledge | Gemini 3.5 Flash-LiteNot measured | MarginNo overlap | Kimi K2.5 (Reasoning)87.2 |
| Multimodal | Gemini 3.5 Flash-LiteNot measured | MarginNo overlap | Kimi K2.5 (Reasoning)78.5 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
Terminal-Bench 2.0
AgenticA 54%B 50.8%Winner: Gemini 3.5 Flash-LiteΔ 3.2Terminal-Bench 2.0: Gemini 3.5 Flash-Lite scored 54%; Kimi K2.5 (Reasoning) scored 50.8%. Gemini 3.5 Flash-Lite wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemini 3.5 Flash-Lite | Kimi K2.5 (Reasoning) | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemini 3.5 Flash-Lite$0.3 input / $2.5 output | Kimi K2.5 (Reasoning)$0.6 input / $3 output | Gemini 3.5 Flash-Lite has the lower combined listed price. |
| Generation speedtokens per second | Gemini 3.5 Flash-LiteNot available | Kimi K2.5 (Reasoning)Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemini 3.5 Flash-LiteNot available | Kimi K2.5 (Reasoning)Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemini 3.5 Flash-Lite1M | Kimi K2.5 (Reasoning)128K | Gemini 3.5 Flash-Lite lists the larger context window. |
Benchmark Deep Dive
AgenticGemini 3.5 Flash-Lite wins11 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Kimi K2.5 (Reasoning) | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 54% | 50.8% | Gemini 3.5 Flash-Lite leads |
| OSWorld-VerifiedSource | 74% | — | Not comparable |
| GDPval-AASource | 1140 | 1009 | Gemini 3.5 Flash-Lite leads |
| AA Agentic IndexSource | 26.8% | 21.7% | Gemini 3.5 Flash-Lite leads |
| GDPval-AASource | 32.0% | 25.4% | Gemini 3.5 Flash-Lite leads |
| AA BriefcaseSource | 634 | — | Not comparable |
| AA Tau3 BankingSource | 16.5% | — | Not comparable |
| BrowseCompSource | — | 60.6% | Not comparable |
| APEX-Agents-AASource | — | 11.5% | Not comparable |
| τ²-bench resultsSource | — | 95.9% | Not comparable |
| Gert LabsSource | — | 32.58% | Not comparable |
CodingKimi K2.5 (Reasoning) wins6 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Kimi K2.5 (Reasoning) | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 54.0% | — | Not comparable |
| SWE-bench ProSource | 54.2% | — | Not comparable |
| AA Coding IndexSource | 49.3% | 46.8% | Gemini 3.5 Flash-Lite leads |
| AA-SciCodeSource | 40.9% | 49.0% | Kimi K2.5 (Reasoning) leads |
| SWE-bench VerifiedSource | — | 76.8% | Not comparable |
| Vibe Code BenchSource | — | 17.54% | Not comparable |
Reasoning3 benchmarks
Knowledge8 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Kimi K2.5 (Reasoning) | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 36.5% | 35.4% | Gemini 3.5 Flash-Lite leads |
| AA-GPQA DiamondSource | 83.8% | 87.9% | Kimi K2.5 (Reasoning) leads |
| AA-HLESource | 17.5% | 29.4% | Kimi K2.5 (Reasoning) leads |
| AA-Omniscience IndexSource | 6.9% | -8.1% | Gemini 3.5 Flash-Lite leads |
| AA-Omniscience AccuracySource | 30.3% | 34.3% | Kimi K2.5 (Reasoning) leads |
| AA-Omniscience Hallucination RateSource | 33.5% | 64.6% | Gemini 3.5 Flash-Lite leads |
| GPQASource | — | 87.6% | Not comparable |
| MMLU-ProSource | — | 87.1% | Not comparable |
Math1 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Kimi K2.5 (Reasoning) | Result |
|---|---|---|---|
| AIME 2025Source | — | 96.1% | Not comparable |
Multimodal3 benchmarks
Inst. Following1 benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | Kimi K2.5 (Reasoning) | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 70.2% | Not comparable |
Frequently Asked Questions (3)
Which is better, Gemini 3.5 Flash-Lite or Kimi K2.5 (Reasoning)?
Gemini 3.5 Flash-Lite and Kimi K2.5 (Reasoning) 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, Gemini 3.5 Flash-Lite or Kimi K2.5 (Reasoning)?
Kimi K2.5 (Reasoning) has the edge for coding in this comparison, averaging 76.8 versus 54.2. Inside this category, AA-SciCode is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Gemini 3.5 Flash-Lite or Kimi K2.5 (Reasoning)?
Gemini 3.5 Flash-Lite has the edge for agentic tasks in this comparison, averaging 63.4 versus 55. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.
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