Kimi K2.5 vs Grok 4.6
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Kimi-K2.5 | Grok 4.6 |
|---|---|---|
| IntelligenceHigher is better · MM Intelligence v1.2 | UnrankedNot in the 22-model eligible cohort | #13 of 2267.6 score |
| CostLower is better · Published-token output estimate | UnrankedNot in the 36-model eligible cohort | #18 of 36$0.097 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.0 | UnrankedNot in the 22-model eligible cohort | #8 of 2256.6 score |
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 | Kimi-K2.5 | Grok 4.6 |
|---|---|---|
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · statistical tie | 1,445.75100% of row best · rating · kimi-k2.5-thinking; 95% CI [1442.41231565, 1449.09515875]; votes 70620; rank 50 | 1,443.75100% of row best · rating · grok-4.6-high; 95% CI [1433.62910542, 1453.86294509]; votes 3453; rank 55 |
| Overall ResultCounted from the protocol-matched rows above · 1 tie | 0 benchmark winsTied overall | 0 benchmark winsTied overall |
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 | Kimi-K2.5 | Grok 4.6 |
|---|---|---|
| Developer | Moonshot AI | xAI |
| Family | Kimi K2 5 | Grok 4 |
| Model | Kimi-K2.5 | Grok 4.6 |
| Version | Kimi-K2.5 | Grok 4.6 |
| Lifecycle | active | active |
| Released | 2026-01-27 | Unknown |
| Knowledge cutoff | Unknown | 2026-02-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 262K | 500K |
| Total parameters | 1T | Unknown |
| Active parameters | 32B | Unknown |
| License | other | Unknown |
| Open weights | Yes | No |
| API available | Yes | Yes |
| Self-hostable | Yes | No |
| Provider access | Deepinfra (Standard), Hugging Face (Standard), Openrouter (Standard) | Xai (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
13 comparable fields · 8 material differences · Pair passes the primary-source comparison gate
Kimi K2.5 Capabilities
Grok 4.6 Capabilities
Internal Comparison Graph
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Primary Evidence
Sources and Freshness
Questions
Kimi K2.5 vs Grok 4.6 FAQs
Is Kimi K2.5 or Grok 4.6 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Kimi K2.5 and Grok 4.6, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Kimi K2.5 or Grok 4.6?+
Kimi K2.5 is $0.45 and Grok 4.6 is $2.00 per million tokens, so Kimi K2.5 is cheaper on this metric. Kimi K2.5 is $2.25 and Grok 4.6 is $6.00 per million tokens, so Kimi K2.5 is cheaper on this metric.
Which has a larger context window, Kimi K2.5 or Grok 4.6?+
Grok 4.6 has the larger sourced context window. Kimi K2.5 supports 262K and Grok 4.6 supports 500K.
Which performs better in benchmarks, Kimi K2.5 or Grok 4.6?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Kimi K2.5 or Grok 4.6 be self-hosted?+
Kimi K2.5 is the only model in this pair currently marked as self-hostable. Kimi K2.5 is open weight; Grok 4.6 is not marked open weight.
Can Kimi K2.5 and Grok 4.6 understand images?+
Kimi K2.5 is documented with image input; Grok 4.6 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Kimi K2.5 or Grok 4.6?+
Neither has a larger sourced maximum output. Kimi K2.5 is — and Grok 4.6 is —.
Do Kimi K2.5 and Grok 4.6 support reasoning and tool use?+
Kimi K2.5: reasoning, tool calling, and image input. Grok 4.6: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Kimi K2.5 or Grok 4.6?+
Kimi K2.5 has 3 sourced provider routes; Grok 4.6 has 1, so Kimi K2.5 has broader tracked availability.
Which offers better value, Kimi K2.5 or Grok 4.6?+
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.