Claude Sonnet 4.6 vs Kimi K2 Thinking
At a Glance
| Compare | Claude Sonnet 4.6Anthropic |  Kimi K2 ThinkingMoonshot AI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | #24 of 4660.3 score · 3/3 sources · complete | UnrankedNot in the 46-model eligible cohort |
| CostLower is better · Published-token output estimate | #31 of 44$0.198 per LiveBench case | UnrankedNot in the 44-model eligible cohort |
| EfficiencyHigher is better · MM Efficiency v1.5 | #31 of 3847.3 score · 3/3 sources · complete | UnrankedNot in the 38-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $3.00Anthropic ↗ · Sep 3, 2026 | $0.60Openrouter ↗ · Sep 23, 2026 |
| Output priceFrom · USD / 1M tokens | $15.00Anthropic ↗ · Sep 3, 2026 | $2.50Openrouter ↗ · Sep 23, 2026 |
| Context windowMaximum documented tokens | 1,000K | 262K |
| Model facts checked | Sep 3, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | Claude Sonnet 4.6 | Kimi-K2-Thinking |
|---|---|---|
| ToneBench2026-09-11-10-task-4ef099199c9c · overall_score · unverified | 83.63100% of row best · points · Claude Sonnet 4.6 · 18,675 output tokens / case | 78.5594% of row best · points · Kimi K2 Thinking · 7,821 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark winsNo overall winner | 0 benchmark winsNo overall winner |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | Claude Sonnet 4.6 | Kimi-K2-Thinking |
|---|---|---|
| Developer | Anthropic | Moonshot AI |
| Family | Claude 4 | Kimi K2 Thinking |
| Model | Claude Sonnet 4.6 | Kimi-K2-Thinking |
| Version | Claude Sonnet 4.6 | Kimi-K2-Thinking |
| Lifecycle | active | active |
| Released | 2026-02-17 | 2025-11-06 |
| Knowledge cutoff | 2025-08-01 | Unknown |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
| Context window | 1,000K | 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 | Anthropic (Standard), Deepinfra (Standard) | Hugging Face (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation, reasoning, tools |
Claude Sonnet 4.6 Capabilities
Kimi K2 Thinking Capabilities
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Primary Evidence
Sources and Freshness
Questions
Claude Sonnet 4.6 vs Kimi K2 Thinking FAQs
Is Claude Sonnet 4.6 or Kimi K2 Thinking better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Sonnet 4.6 and Kimi K2 Thinking, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Sonnet 4.6 or Kimi K2 Thinking?+
Claude Sonnet 4.6 is $3.00 and Kimi K2 Thinking is $0.60 per million tokens, so Kimi K2 Thinking is cheaper on this metric. Claude Sonnet 4.6 is $15.00 and Kimi K2 Thinking is $2.50 per million tokens, so Kimi K2 Thinking is cheaper on this metric.
Which has a larger context window, Claude Sonnet 4.6 or Kimi K2 Thinking?+
Claude Sonnet 4.6 has the larger sourced context window. Claude Sonnet 4.6 supports 1,000K and Kimi K2 Thinking supports 262K.
Which performs better in benchmarks, Claude Sonnet 4.6 or Kimi K2 Thinking?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Sonnet 4.6 or Kimi K2 Thinking be self-hosted?+
Kimi K2 Thinking is the only model in this pair currently marked as self-hostable. Claude Sonnet 4.6 is not marked open weight; Kimi K2 Thinking is open weight.
Can Claude Sonnet 4.6 and Kimi K2 Thinking understand images?+
Claude Sonnet 4.6 is documented with image input; Kimi K2 Thinking is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Sonnet 4.6 or Kimi K2 Thinking?+
Kimi K2 Thinking has the larger sourced maximum output: Claude Sonnet 4.6 supports 128K and Kimi K2 Thinking supports 131K output tokens.
Do Claude Sonnet 4.6 and Kimi K2 Thinking support reasoning and tool use?+
Claude Sonnet 4.6: reasoning, tool calling, and image input. Kimi K2 Thinking: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Sonnet 4.6 or Kimi K2 Thinking?+
Claude Sonnet 4.6 has 2 sourced provider routes; Kimi K2 Thinking has 2, a tie.
Which offers better value, Claude Sonnet 4.6 or Kimi K2 Thinking?+
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.