Kimi K2 0905
Kimi K2 0905 is the September update of [Kimi K2 0711](moonshotai/kimi-k2). It is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32 billion active per forward pass. It supports long-context inference up to 256k tokens, extended from the previous 128k. This update improves agentic coding with higher accuracy and better generalization across scaffolds, and enhances frontend coding with more aesthetic and functional output
Context window
This model accepts 262K tokens in one request (~197K words of text).
What fits in one request
- FitsShort documentAbout 1,500 words of text
- FitsLong documentAbout 37K words of text
- FitsSmall codebaseAbout 150K words of text
- Won't fitFull novelAbout 375K words of text
Specifications
Context size, pricing, and release info in one place.
- Context window
- 262,144 tokens (262K)
- Max output tokens
- 262,144 tokens (262K)
- Speed tier
- balanced
- Provider
- Moonshot
- Release date
- Sep 2025
- Input cost
- $0.600/M / 1M tokens
- Output cost
- $2.50/M / 1M tokens
Capabilities
See which features this model supports, such as vision, tools, and streaming.
- Tool use
- Can call external tools and APIs
- Supported
- Function calling
- Structured function call interface
- Supported
- Streaming
- Returns tokens as they are generated
- Supported
- Prompt caching
- Reuse repeated prompt prefixes cheaply
- Supported
- Vision
- Accepts image inputs alongside text
- Not supported
- Extended thinking
- Shows its chain-of-thought reasoning
- Not supported
- Web search
- Can browse the web during a request
- Not supported
- Batch API
- Process many requests asynchronously
- Not supported
Best for
Jump to a guide or ranking that matches each workload.
Compare Kimi K2 0905
Open a side-by-side comparison with one click.
- Kimi K2 0905 vs Amazon Titan Text Express
Kimi K2 0905 has 524% larger context window
- Kimi K2 0905 vs Amazon Titan Text Lite
Kimi K2 0905 has 524% larger context window
- Kimi K2 0905 vs Amazon Titan Text Premier
Kimi K2 0905 has 524% larger context window
- Kimi K2 0905 vs Claude Instant
Kimi K2 0905 has 162% larger context window
- Kimi K2 0905 vs Anthropic Claude
Kimi K2 0905 has 162% larger context window
- Kimi K2 0905 vs Codellama 34b Instruct
Kimi K2 0905 has 6300% larger context window
Frequently asked questions
Short answers about context size and how this model behaves.
More from Moonshot
Other models by Moonshot in our catalog.
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