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Kimi K2 Thinking

Reasoning model by Moonshot AI.

Moonshot advanced reasoning model. Utilizes structured deliberation tokens for multi-step reasoning, mathematical problem solving, and complex logic.

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Models / Kimi K2 ThinkingID: bedrock/moonshot.kimi-k2-thinking

Maker

Moonshot AI

Served On: AWS Bedrock · Also served via Google Vertex AI

Specifications

Context window, ranked against other reasoning models

Proportional scale: 0 to 200K tokens. Not ranked, no published context window: gpt-5.2-pro-2025-12-11, gpt-5.4-pro, grok-4-1-fast-non-reasoning, grok-4-1-fast-reasoning, gpt-5.2-pro.

Context window

—

Max output

—

Modality

reasoning

Vision
Function calling
System prompt

Pricing

Rates are read live

Pricing for kimi-k2-thinking is fetched from the live catalogue on load, so it is never served from a cache that could outlive a repricing.

Provider-Reported Capabilities

What the hosting provider reports for this model, shown as it was returned. nRouter adds nothing to this report and infers nothing that is missing from it.

Model ID modelId

moonshot.kimi-k2-thinking

Converse converse
Max Tokens Default maxTokensDefault

null

Max Tokens Maximum maxTokensMaximum

262144

Reasoning Supported reasoningSupported
Embedded embedded
System Role Supported systemRoleSupported
Stop Sequences Default stopSequencesDefault
User Image Types Supported userImageTypesSupported
User Video Types Supported userVideoTypesSupported
User Document Types Supported userDocumentTypesSupported
Model Name modelName

Kimi K2 Thinking

Description description

null

Model Family modelFamily

Kimi K2

Provider Name providerName

Moonshot AI

Batch Supported batchSupported
Base Model Supported baseModelSupported
Cross Region Supported crossRegionSupported
Custom Model Supported customModelSupported
Model Lifecycle modelLifecycle
Status status

ACTIVE

Legacy Time legacyTime

null

End Of Life Time endOfLifeTime

null

Public Extended Access Time publicExtendedAccessTime

null

Input Modalities inputModalities
TEXT
Output Modalities outputModalities
TEXT
Features Supported featuresSupported
Count Tokens countTokens
Prompt Caching promptCaching
Batch Inference batchInference
In Region inRegion
Cross Region crossRegion
Prompt Optimization promptOptimization
Provisioned Throughput provisionedThroughput
Intelligent Prompt Routing intelligentPromptRouting
Console IDEMetadata consoleIDEMetadata

null

Guardrails Supported guardrailsSupported
Explicit Prompt Caching explicitPromptCaching
Is Supported isSupported
Inference APIs Supported inferenceAPIsSupported
Converse converse
Sync sync
Streaming streaming
Async Invoke asyncInvoke
Invoke Model invokeModel
Sync sync
Response Streaming responseStreaming
Bidirectional Streaming bidirectionalStreaming
Open AI Responses openAiResponses
Open AI Chat Completions openAiChatCompletions
Customizations Supported customizationsSupported
Inference Types Supported inferenceTypesSupported
ON_DEMAND
Intelligent Prompt Routing intelligentPromptRouting
Is Supported isSupported
Response Streaming Supported responseStreamingSupported
Latency Optimization Supported latencyOptimizationSupported

Availability

Not enough data yet

We have not collected enough health probes for this model to publish an uptime or latency figure. A percentage from a handful of samples is fabricated precision, so none is shown until the sample count supports one.

How Kimi K2 Thinking is billed

Billed at the provider's list price, with no per-token markup.

Exact list price
Tokens settle at the published rate of the model that served your call.
Cache discounts passed through
Provider prompt-caching discounts reach your balance with no added fee.
Cost on every response
Each response carries the x-nr-request-cost header, so you can reconcile spend per request.

More from Moonshot AI

moonshotai/Kimi-K2.6kimi-k2.5moonshotai/Kimi-K3kimi-k2-thinking-maas

Start building with kimi-k2-thinking

One API key, three steps. Choose your tool to begin.

  1. Get a key

    Create API key

  2. Set your API key

    export NROUTER_API_KEY="<YOUR_API_KEY>"

  3. Configure Claude Code

    Choose a tool, then copy its setup from the panel.

npm install -g @anthropic-ai/claude-code
Claude Code · bedrock/moonshot.kimi-k2-thinking
# Point Claude Code to nRouter gateway
export ANTHROPIC_BASE_URL="https://api.nrouter.ai"
export ANTHROPIC_API_KEY="$NROUTER_API_KEY"

# Launch with bedrock/moonshot.kimi-k2-thinking
claude --model bedrock/moonshot.kimi-k2-thinking

FAQs

What is Kimi K2 Thinking?

Moonshot advanced reasoning model. Utilizes structured deliberation tokens for multi-step reasoning, mathematical problem solving, and complex logic.

How much does Kimi K2 Thinking cost?

Kimi K2 Thinking is billed at the provider's list price on nRouter with no per-token markup — tokens settle at the exact upstream rate. Input and output rates are read live, so see the pricing section above for the current figures.

Does Kimi K2 Thinking support tool calling and structured outputs?

Yes. Kimi K2 Thinking supports tool calling (function calling), so it can invoke external tools and APIs during a conversation.

What inputs and outputs does Kimi K2 Thinking support?

Kimi K2 Thinking takes text and images as input and returns text as output.

How do I use Kimi K2 Thinking via nRouter?

Use any OpenAI-compatible client: point it at https://api.nrouter.ai/v1 with your nRouter API key and set the model to "bedrock/moonshot.kimi-k2-thinking". The quick-start panel above has a copy-paste curl command for this model.

When was Kimi K2 Thinking released?

Kimi K2 Thinking was released on August 30, 2026.

Where is the Kimi K2 Thinking documentation?

Start at nrouter.ai/docs. The quick-start guide (nrouter.ai/docs/getting-started/quick-start) covers API keys and your first request, and the API reference (nrouter.ai/docs/api-reference) lists every parameter.

What other text models does Moonshot AI have?

Other Moonshot AI text models on nRouter include Kimi K2.6 (nrouter.ai/models/moonshotai-kimi-k2.6), Kimi K2.5 (nrouter.ai/models/kimi-k2.5), Kimi K3 (nrouter.ai/models/moonshotai-kimi-k3), Kimi K2 Thinking (nrouter.ai/models/kimi-k2-thinking-maas).