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Claude Mythos 5.2 vs Kimi K2 Instruct

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 21.1. Kimi K2 Instruct is 32.0x cheaper per token.

Anthropic · Moonshot AI · Updated for 2026

Which is better?

Claude Mythos 5.2 leads the overall LLM Stats Score 59.6 to 21.1, ranking #2 overall.

On price, Kimi K2 Instruct is roughly 32.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Mythos 5.2 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Mythos 5.2

  • overall performance matters — it scores 59.6 and ranks #2 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Nov 2026

Choose Kimi K2 Instruct

  • cost matters — it's about 32.0x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Mythos 5.2
Anthropic
Kimi K2 Instruct
Moonshot AI
Core performance indexes
LLM Stats Score
59.6
#2
21.1
#229
Reasoning
53.6
#7
21.3
#216
Coding
44.6
#5
12.1
#185
Agents
44.1
#2
-1.9
#221
Cost, coverage & limits
Benchmark wins
—
—
Input price
$8.00 / M
$0.50 / M
Output price
$40.00 / M
$0.50 / M
Context window
1,000,000
200,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Mythos 5.2
Kimi K2 Instruct
Tool use
38.5#1
5.8#186
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Claude Mythos 5.2 · 38 for Kimi K2 Instruct

No common benchmarks found

Claude Mythos 5.2 and Kimi K2 Instructdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Kimi K2 Instruct costs less

For input processing, Claude Mythos 5.2 ($8.00/1M tokens) is 16.0x more expensive than Kimi K2 Instruct ($0.50/1M tokens).

For output processing, Claude Mythos 5.2 ($40.00/1M tokens) is 80.0x more expensive than Kimi K2 Instruct ($0.50/1M tokens).

In conclusion, Claude Mythos 5.2 is more expensive than Kimi K2 Instruct.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Nov 13 2026 • llm-stats.com
Anthropic
Claude Mythos 5.2
Input tokens$8.00
Output tokens$40.00
Best providerAnthropic
Moonshot AI
Kimi K2 Instruct
Input tokens$0.50
Output tokens$0.50
Best providerFireworks
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Claude Mythos 5.2 accepts 1,000,000 input tokens compared to Kimi K2 Instruct's 200,000 tokens. Kimi K2 Instruct can generate longer responses up to 200,000 tokens, while Claude Mythos 5.2 is limited to 128,000 tokens.

Anthropic
Claude Mythos 5.2
Input1,000,000 tokens
Output128,000 tokens
Moonshot AI
Kimi K2 Instruct
Input200,000 tokens
Output200,000 tokens
Fri Nov 13 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Mythos 5.2 supports multimodal inputs, whereas Kimi K2 Instruct does not.

Claude Mythos 5.2 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Mythos 5.2

Text
Images
Audio
Video

Kimi K2 Instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.2 is licensed under a proprietary license, while Kimi K2 Instruct uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Mythos 5.2

Proprietary

Closed source

Kimi K2 Instruct

MIT

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.2 was released on 2026-11-09, while Kimi K2 Instruct was released on 2025-07-11.

Claude Mythos 5.2 is 16 months newer than Kimi K2 Instruct.

Claude Mythos 5.2

Nov 9, 2026

4 days ago

1.3yr newer
Kimi K2 Instruct

Jul 11, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

Claude Mythos 5.2 has a documented knowledge cutoff of 2026-06-01, while Kimi K2 Instruct's cutoff date is not specified.

We can confirm Claude Mythos 5.2's training data extends to 2026-06-01, but cannot make a direct comparison without Kimi K2 Instruct's cutoff date.

Claude Mythos 5.2

Jun 2026

Kimi K2 Instruct

—

Provider Availability

Claude Mythos 5.2 is available from Anthropic. Kimi K2 Instruct is available from Fireworks, Novita.

Claude Mythos 5.2

anthropic logo
Anthropic
Input Price:Input: $8.00/1MOutput Price:Output: $40.00/1M

Kimi K2 Instruct

fireworks logo
Fireworks
Input Price:Input: $0.50/1MOutput Price:Output: $0.50/1M
novita logo
Novita
Input Price:Input: $0.57/1MOutput Price:Output: $2.30/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Mythos 5.2 and Kimi K2 Instruct side-by-side, then vote on the output you prefer.

Claude Mythos 5.2
✓ Preferred
Kimi K2 Instruct
Open in Playground

FAQ

Common questions about Claude Mythos 5.2 vs Kimi K2 Instruct.

Which is better, Claude Mythos 5.2 or Kimi K2 Instruct?

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 21.1. Claude Mythos 5.2 is made by Anthropic and Kimi K2 Instruct is made by Moonshot AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos 5.2 compare to Kimi K2 Instruct in benchmarks?

Claude Mythos 5.2 scores De novo protein binder design: 85.1%, Biomedical image analysis: 80.7%, Protocols Troubleshooting: 77.1%, Terminal-Bench-Science 0.1: 75.3%, Terminal-Bench 4.0: 70.5%. Kimi K2 Instruct scores MATH-500: 97.4%, GSM8k: 97.3%, CBNSL: 95.6%, HumanEval: 93.3%, MMLU-Redux: 92.7%.

Is Claude Mythos 5.2 cheaper than Kimi K2 Instruct?

Kimi K2 Instruct is 16.0x cheaper for input tokens. Claude Mythos 5.2 costs $8.00/M input and $40.00/M output via anthropic. Kimi K2 Instruct costs $0.50/M input and $0.50/M output via fireworks.

What are the context window sizes for Claude Mythos 5.2 and Kimi K2 Instruct?

Claude Mythos 5.2 supports 1.0M tokens and Kimi K2 Instruct supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Mythos 5.2 and Kimi K2 Instruct?

Key differences include LLM Stats Score (59.6 vs 21.1), context window (1.0M vs 200K), input pricing ($8.00 vs $0.50/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.2 and Kimi K2 Instruct?

Claude Mythos 5.2 is developed by Anthropic and Kimi K2 Instruct is developed by Moonshot AI.

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