Gemini 3.1 Pro vs Kimi K2.5
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Gemini 3.1 Pro | Kimi-K2.5 |
|---|---|---|
| CostLower is better · Published-token output estimate | #22 of 36$0.161 per LiveBench case | UnrankedNot in the 36-model eligible cohort |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
| Benchmark | Gemini 3.1 Pro | Kimi-K2.5 |
|---|---|---|
| LMArena Document Arenadocument-2026-07-30-011508720696 · arena_rating · leader | 1,445.32100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1439.35538449, 1451.29339146]; votes 45162; rank 23 | 1,429.4999% of row best · rating · kimi-k2.5-thinking; 95% CI [1422.63887395, 1436.33791058]; votes 19891; rank 28 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,480.10100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1476.89767236, 1483.30025658]; votes 102763; rank 11 | 1,445.7598% of row best · rating · kimi-k2.5-thinking; 95% CI [1442.41231565, 1449.09515875]; votes 70620; rank 50 |
| LMArena Vision Arenavision-2026-08-27-011508720696 · arena_rating · leader | 1,295.39100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1289.75236576, 1301.03738662]; votes 39412; rank 17 | 1,266.7498% of row best · rating · kimi-k2.5-thinking; 95% CI [1260.83834046, 1272.64651923]; votes 26728; rank 36 |
| Overall ResultCounted from the protocol-matched rows above | 3 benchmark winsOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Gemini 3.1 Pro | Kimi-K2.5 |
|---|---|---|
| Developer | Google DeepMind | Moonshot AI |
| Family | Gemini 3 | Kimi K2 5 |
| Model | Gemini 3.1 Pro | Kimi-K2.5 |
| Version | Gemini 3.1 Pro | Kimi-K2.5 |
| Lifecycle | preview | active |
| Released | Unknown | 2026-01-27 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image, Video, Audio, Document | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,049K | 262K |
| Total parameters | Unknown | 1T |
| Active parameters | Unknown | 32B |
| License | Unknown | other |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Google AI (Standard), Google Gemini (Standard) | Deepinfra (Standard), Hugging Face (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
13 comparable fields · 10 material differences · Pair passes the primary-source comparison gate
Gemini 3.1 Pro Capabilities
Kimi K2.5 Capabilities
Internal Comparison Graph
Related Comparisons
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|---|---|---|---|
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Gemini 3.1 ProGoogle DeepMind | vs |  Mistral Large 3Mistral AI | cross-developer peerstext |
Primary Evidence
Sources and Freshness
Questions
Gemini 3.1 Pro vs Kimi K2.5 FAQs
Is Gemini 3.1 Pro or Kimi K2.5 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Gemini 3.1 Pro and Kimi K2.5, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Gemini 3.1 Pro or Kimi K2.5?+
Gemini 3.1 Pro is $2.00 and Kimi K2.5 is $0.45 per million tokens, so Kimi K2.5 is cheaper on this metric. Gemini 3.1 Pro is $12.00 and Kimi K2.5 is $2.25 per million tokens, so Kimi K2.5 is cheaper on this metric.
Which has a larger context window, Gemini 3.1 Pro or Kimi K2.5?+
Gemini 3.1 Pro has the larger sourced context window. Gemini 3.1 Pro supports 1,049K and Kimi K2.5 supports 262K.
Which performs better in benchmarks, Gemini 3.1 Pro or Kimi K2.5?+
There is no overall benchmark winner: An overall winner requires at least two decisive benchmarks from at least two original publishers.
Can Gemini 3.1 Pro or Kimi K2.5 be self-hosted?+
Kimi K2.5 is the only model in this pair currently marked as self-hostable. Gemini 3.1 Pro is not marked open weight; Kimi K2.5 is open weight.
Can Gemini 3.1 Pro and Kimi K2.5 understand images?+
Gemini 3.1 Pro is documented with image input; Kimi K2.5 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Gemini 3.1 Pro or Kimi K2.5?+
Neither has a larger sourced maximum output. Gemini 3.1 Pro is 66K and Kimi K2.5 is —.
Do Gemini 3.1 Pro and Kimi K2.5 support reasoning and tool use?+
Gemini 3.1 Pro: reasoning, tool calling, and image input. Kimi K2.5: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Gemini 3.1 Pro or Kimi K2.5?+
Gemini 3.1 Pro has 2 sourced provider routes; Kimi K2.5 has 3, so Kimi K2.5 has broader tracked availability.
Which offers better value, Gemini 3.1 Pro or Kimi K2.5?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.