Kimi K2 Thinking, released November 6, 2025, is Moonshot's agentic reasoning variant, extending the Kimi K2 foundation with deliberate multi-step reasoning and extended tool coordination. It is built on the 1 trillion total parameter MoE architecture with 32 billion active parameters and is tuned for complex tasks that benefit from explicit step-by-step planning. The model can execute 200 to 300 sequential tool calls without human intervention, supporting autonomous work across intricate, multi-stage workflows. It reports strong results on reasoning-intensive benchmarks, including 44.9% on Humanity's Last Exam with tools, 60.2% on BrowseComp, and 71.3% on SWE-Bench Verified, competing with frontier proprietary models. Its core strength is planning before answering, breaking tasks into sub-goals, explaining reasoning steps, and coordinating tools when useful. It supports a 256K token context window and is released as open source under a Modified MIT License.
Kimi K2 Thinking runs on 2 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance β full data-handling detail per route below.
Training posture across routes: No training on prompts by default.
Each route hosting Kimi K2 Thinking has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.
Zero data retention is on by default on Pay-as-you-go β no action required. No training on customer data. EU; DPA available.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.
Independent benchmark scores β composite indices for reasoning, coding, and math, plus individual eval scores where available.
Call Kimi K2 Thinking through the Opper gateway with one API key. Let your coding agent set it up, or call it directly β Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.
Copy this and paste it into your coding agent β Claude Code, Cursor, Codex, and more β and it'll wire up Opper for you.
import OpenAI from "openai";const client = new OpenAI({apiKey: process.env.OPPER_API_KEY,baseURL: "https://api.opper.ai/v3/compat",});const completion = await client.chat.completions.create({model: "evroc/kimi-k2-thinking",messages: [{ role: "user", content: "Hello" }],});console.log(completion.choices[0].message.content);
Side-by-side on privacy, EU hosting, pricing, and benchmarks.
