moonshotai

MoonshotAI: Kimi K2 Thinking

MoonshotAI's Kimi K2 Thinking is designed for handling extensive text inputs with a context length of 262,144 tokens and supports both reasoning and tools integration. It excels in understanding and processing natural language while enabling interactive workflows through its tool support. Despite its robust capabilities, the model falls short on structured output, making it less suitable for tasks requiring predefined data formats. Given its benchmark score of 54.6 across a single independent evaluation, MoonshotAI's Kimi K2 Thinking stands as a viable option for those prioritizing cost-effectiveness, particularly in text-based applications where reasoning and tool integration are crucial. Its pricing at $0.6 per million input tokens and $2.5 per million output tokens makes it accessible for budget-conscious users without compromising on performance.

Quality Score
98/100
price + capability + benchmarks
Input Price
$0.60
per 1M tokens
Output Price
$2.50
per 1M tokens
Context Window
262,144
tokens

Benchmark results

Independent, published benchmarks. Blended score 54.6 across 1 benchmark, last refreshed 2026-08-13. How scoring works →

BenchmarkMeasuresScore
AI Index broad capability composite 55.3
Model ID
moonshotai/kimi-k2-thinking
Vendor
moonshotai
Released
November 2025
Tokenizer
Other
Input Modalities
text
Output Modalities
text
Max Output
100,352 tokens
Tool Calling
✓ supported
Structured Output
✓ supported
Reasoning Mode
✓ supported
Vision
text only
Audio
no
Moderated
no

What it costs in practice

Computed from the current $0.60/M input and $2.50/M output rates. Run your own numbers →

JobTokensCost
Summarize a 50-page report 30k in / 1.5k out $0.02
Classify 1,000 customer emails 500k in / 50k out $0.42
A month of a busy support chatbot 5M in / 2M out $8.00

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Quick answers

How much does MoonshotAI: Kimi K2 Thinking cost?
$0.60 per million input tokens and $2.50 per million output tokens.
What is MoonshotAI: Kimi K2 Thinking's context window?
262,144 tokens, roughly 393 pages of text in a single request.
Does MoonshotAI: Kimi K2 Thinking support tool calling?
It supports tool calling, structured output, a reasoning mode.
Can MoonshotAI: Kimi K2 Thinking process images?
No, it is text-only on the input side.