Model comparison
Gemini 3 Pro Deep Think vs Kimi K2.5
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Gemini 3 Pro Deep Think #41 (Estimated); Kimi K2.5 #54 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemini 3 Pro Deep Think and Kimi K2.5 share 1 comparable benchmark result. 1 of 8 categories are comparable. 1 result is unique to Gemini 3 Pro Deep Think; 62 to Kimi K2.5.
Updated July 20, 2026- Shared results
- 1
- Gemini 3 Pro Deep Think only
- 1
- Kimi K2.5 only
- 62
- Comparable categories
- 1 / 8
Pick Gemini 3 Pro Deep Think if you want the stronger benchmark profile. Kimi K2.5 only becomes the better choice if reasoning is the priority or you would rather avoid the extra latency and token burn of a reasoning model.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 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 Pro Deep Think has the cleaner BenchAlign overall profile here, landing at 61.31 versus 59.66. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
Gemini 3 Pro Deep Think is the reasoning model in the pair, while Kimi K2.5 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 Pro Deep Think gives you the larger context window at 2M, compared with 256K for Kimi K2.5.
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 Pro Deep Think | Δ | Kimi K2.5 |
|---|---|---|---|
| Reasoning | Gemini 3 Pro Deep Think45.1 | Margin→ 15.9 | Kimi K2.561.0 |
| Agentic | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | Kimi K2.555.0 |
| Coding | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | Kimi K2.559.4 |
| Knowledge | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | Kimi K2.556.9 |
| Math | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | Kimi K2.560.6 |
| Multilingual | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | Kimi K2.582.3 |
| Multimodal | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | Kimi K2.578.5 |
| Inst. Following | Gemini 3 Pro Deep ThinkNot measured | MarginNo overlap | Kimi K2.593.9 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemini 3 Pro Deep Think | Kimi K2.5 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemini 3 Pro Deep ThinkNot available | Kimi K2.5$0.6 input / $3 output | A complete price comparison is not available. |
| Generation speedtokens per second | Gemini 3 Pro Deep ThinkNot available | Kimi K2.545 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemini 3 Pro Deep ThinkNot available | Kimi K2.52.38 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemini 3 Pro Deep Think2M | Kimi K2.5256K | Gemini 3 Pro Deep Think lists the larger context window. |
Benchmark Deep Dive
Agentic19 benchmarks
| Benchmark | Gemini 3 Pro Deep Think | Kimi K2.5 | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | — | 50.8% | Not comparable |
| BrowseCompSource | — | 60.6% | Not comparable |
| Claw-EvalSource | — | 52.3% | Not comparable |
| QwenClawBenchSource | — | 54.3% | Not comparable |
| τ³-bench resultsSource | — | 65.7% | Not comparable |
| DeepSearchQASource | — | 77.1% | Not comparable |
| DeepPlanningSource | — | 14.4% | Not comparable |
| ToolathlonSource | — | 27.8% | Not comparable |
| MCP AtlasSource | — | 29.5% | Not comparable |
| MCP-TasksSource | — | 59.1% | Not comparable |
| WideResearchSource | — | 72.7% | Not comparable |
| τ²-bench resultsSource | — | 95.9% | Not comparable |
| APEX-Agents-AASource | — | 11.5% | Not comparable |
| Gert LabsSource | — | 45.88% | Not comparable |
| ResearchClawBenchSource | — | 14.0% | Not comparable |
| JobBenchSource | — | 8.7% | Not comparable |
| AA Agentic IndexSource | — | 21.7% | Not comparable |
| GDPval-AASource | — | 25.4% | Not comparable |
| GDPval-AASource | — | 1009 | Not comparable |
Coding10 benchmarks
| Benchmark | Gemini 3 Pro Deep Think | Kimi K2.5 | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | — | 76.8% | Not comparable |
| SWE-bench Verified*Source | — | 70.8% | Not comparable |
| LiveCodeBench v6Source | — | 85.0% | Not comparable |
| SWE-bench ProSource | — | 50.7% | Not comparable |
| SWE MultilingualSource | — | 73% | Not comparable |
| SWE-RebenchSource | — | 58.5% | Not comparable |
| React Native EvalsSource | — | 77.2% | Not comparable |
| SciCodeSource | — | 48.7% | Not comparable |
| AA-SciCodeSource | — | 49.0% | Not comparable |
| AA Coding IndexSource | — | 46.8% | Not comparable |
ReasoningKimi K2.5 wins4 benchmarks
Knowledge12 benchmarks
| Benchmark | Gemini 3 Pro Deep Think | Kimi K2.5 | Result |
|---|---|---|---|
| GPQASource | — | 87.6% | Not comparable |
| GPQA-DSource | — | 87.6% | Not comparable |
| SuperGPQASource | — | 69.2% | Not comparable |
| MMLU-ProSource | — | 87.1% | Not comparable |
| MMLU-Pro (Arcee)Source | — | 87.1% | Not comparable |
| HLESource | — | 30.1% | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 35.4% | Not comparable |
| AA-GPQA DiamondSource | — | 87.9% | Not comparable |
| AA-HLESource | — | 29.4% | Not comparable |
| AA-Omniscience IndexSource | — | -8.1% | Not comparable |
| AA-Omniscience AccuracySource | — | 34.3% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 64.6% | Not comparable |
Math9 benchmarks
| Benchmark | Gemini 3 Pro Deep Think | Kimi K2.5 | Result |
|---|---|---|---|
| AIME 2025Source | — | 96.1% | Not comparable |
| AIME26Source | — | 95.8% | Not comparable |
| AIME25 (Arcee)Source | — | 96.3% | Not comparable |
| HMMT Feb 2025Source | — | 95.4% | Not comparable |
| HMMT Nov 2025Source | — | 91.1% | Not comparable |
| HMMT Feb 2026Source | — | 87.1% | Not comparable |
| MMAnswerBenchSource | — | 81.8% | Not comparable |
| FrontierMath v2 (Tiers 1-3)Source | — | 27.900% | Not comparable |
| FrontierMath v2 (Tier 4)Source | — | 4.200% | Not comparable |
Multilingual2 benchmarks
Multimodal6 benchmarks
Frequently Asked Questions (2)
Which is better, Gemini 3 Pro Deep Think or Kimi K2.5?
Gemini 3 Pro Deep Think is ahead on BenchLM's BenchAlign leaderboard, 61.31 to 59.66.
Which is better for reasoning, Gemini 3 Pro Deep Think or Kimi K2.5?
Kimi K2.5 has the edge for reasoning in this comparison, averaging 61 versus 45.1. Inside this category, CritPt is the benchmark that creates the most daylight between them.
Self-host vs API cost
Estimates at 50,000 req/day · 1000 tokens/req average.
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