# Kimi K2.6

Kimi K2.6 is an AI model released by Moonshot AI on Apr 21 2026. It has 1T parameters, a 256k context window and open weight. Tracked results include 65% on BullshitBench v2, 90.5% on GPQA Diamond and 80.2% on SWE-Bench Verified.

## Facts

| Field | Value |
| --- | --- |
| Model | Kimi K2.6 |
| Developer | Moonshot AI |
| Release date | Tuesday, Apr 21 2026 |
| Licensing | Open Weight |
| Parameters | 1T |
| Context window | 256k |

## API pricing

All rates in USD per 1,000,000 tokens, pay-as-you-go.

| Tier | Input | Cached input | Output |
| --- | --- | --- | --- |
| Standard | $0.95 | $0.16 | $4.00 |

Verified August 18, 2026 against the first-party source: https://platform.kimi.ai/docs/pricing/chat-k26.md

## Tracked benchmark scores

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| BullshitBench v2 | 65% | [BullshitBench](https://github.com/petergpt/bullshit-benchmark) | Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. |
| SWE-Bench Verified | 80.2% | 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. |
| Next.js Evals | 52% | [Next.js Evals](https://nextjs.org/evals) | Vercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. |
| LiveCodeBench | 89.6% | [BenchLM](https://benchlm.ai), retrieved 2026-07-11 | Coding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. |
| BrowseComp | 83.2% | [BenchLM](https://benchlm.ai), retrieved 2026-08-31 | Can the AI browse the web and track down hard-to-find answers? Higher is better. |
| Humanity's Last Exam (with tools) | 34.7% | [BenchLM](https://benchlm.ai), retrieved 2026-08-31 | Humanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. |
| GPQA Diamond | 90.5% | Lab | Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. |
| OSWorld-Verified | 73.1% | [BenchLM](https://benchlm.ai), retrieved 2026-08-31 | Can the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. |

## About Kimi K2.6

Kimi K2.6, released April 21, 2026, was Moonshot AI's trillion-parameter open-weight flagship of spring 2026, scoring 90.5% on GPQA Diamond and 80.2% on SWE-Bench Verified — numbers that matched or beat several proprietary frontier models of the same season — along with 89.6% on LiveCodeBench and a WebDev Arena Elo of 1513.

The jump over January's K2.5 was substantial (up nearly three points on GPQA and 3.4 on SWE-Bench Verified in twelve weeks), keeping Moonshot in the small group of labs shipping frontier-class open weights. The coding-specialised Kimi K2.7 Code followed in June 2026, and the K2 era closed when the 2.8-trillion-parameter Kimi K3 arrived that July.

## Questions and answers

### When was Kimi K2.6 released?

Kimi K2.6 was released by Moonshot AI on Tuesday, Apr 21 2026.

### Who made Kimi K2.6?

Kimi K2.6 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.

### How much does Kimi K2.6 cost?

Kimi K2.6 costs $0.95 per million input tokens and $4.00 per million output tokens through the Moonshot AI API. Cached input is $0.16 per million tokens. Rates are pay-as-you-go API prices verified against Moonshot AI's published pricing on August 18, 2026.

### What benchmark scores did Kimi K2.6 get?

Kimi K2.6 reports 8 tracked benchmark scores — BullshitBench v2: 65%; SWE-Bench Verified: 80.2%; Next.js Evals: 52%; LiveCodeBench: 89.6%; BrowseComp: 83.2%; Humanity's Last Exam (with tools): 34.7%; GPQA Diamond: 90.5%; OSWorld-Verified: 73.1%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

### What is the context window of Kimi K2.6?

Kimi K2.6 has a context window of 256k. That is the maximum amount of input plus output the model can hold in a single request.

### How many parameters does Kimi K2.6 have?

Kimi K2.6 is reported at 1T parameters.

### Is Kimi K2.6 open source?

Partly. Kimi K2.6 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 K2.6?

Moonshot AI's previous tracked release was Kimi K2.5 on Jan 27 2026, 84 days earlier. It was followed by Kimi K2.7 Code on Jun 12 2026.


---

Canonical page: https://aireleasetracker.com/model/moonshot/kimi-k2.6
Full dataset: https://aireleasetracker.com/llms-full.txt · JSON: https://aireleasetracker.com/models.json
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.