# Kimi K2 Thinking

Kimi K2 Thinking is an AI model released by Moonshot AI on Nov 6 2025. It has 1T parameters, a 256k context window and open weight. Tracked results include 71.3% on SWE-Bench Verified.

## Facts

| Field | Value |
| --- | --- |
| Model | Kimi K2 Thinking |
| Developer | Moonshot AI |
| Release date | Thursday, Nov 6 2025 |
| Licensing | Open Weight |
| Parameters | 1T |
| Context window | 256k |

## Tracked benchmark scores

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| SWE-Bench Verified | 71.3% | Lab | Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. |

## About Kimi K2 Thinking

Kimi K2 Thinking was introduced in November 2025 as a reasoning-oriented member of Moonshot’s K2 family. The mixture-of-experts model had one trillion total parameters with about 32 billion active per token and supported a 256K-token context.

The model was designed to interleave reasoning with tool calls across extended tasks, including coding and search workflows. Moonshot published downloadable weights and documented the inference settings used for its evaluations. Those agent results depended on tools and orchestration as well as the model, so they should be compared under the stated setup.

## Questions and answers

### When was Kimi K2 Thinking released?

Kimi K2 Thinking was released by Moonshot AI on Thursday, Nov 6 2025.

### Who made Kimi K2 Thinking?

Kimi K2 Thinking was built by Moonshot AI. Chinese AI company building the Kimi family of models. Founded in 2023, known for long-context and efficient MoE architectures.

### What benchmark scores did Kimi K2 Thinking get?

Kimi K2 Thinking reports 1 tracked benchmark score — SWE-Bench Verified: 71.3%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

### What is the context window of Kimi K2 Thinking?

Kimi K2 Thinking has a context window of 256k. Providers may specify separate input and output token limits.

### How many parameters does Kimi K2 Thinking have?

Kimi K2 Thinking is reported at 1T parameters.

### Is Kimi K2 Thinking open source?

Partly. Kimi K2 Thinking is an open-weight model: the trained weights are free to download and run locally or on your own infrastructure, but the training data and code are not fully released and the license may restrict some commercial uses. It is not open source in the strict sense.

### What came before and after Kimi K2 Thinking?

Moonshot AI's previous tracked release was Kimi Linear on Oct 30 2025, 7 days earlier. It was followed by Kimi K2.5 on Jan 27 2026.


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Canonical page: https://aireleasetracker.com/model/moonshot/kimi-k2-thinking
Site index: https://aireleasetracker.com/llms.txt
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.