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Claude Mythos 5.2 vs Kimi K3.1 Pro

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 55.1. Kimi K3.1 Pro is 4.0x 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 55.1, ranking #2 overall.

In the 2 individual benchmarks reported for both models, Claude Mythos 5.2 wins 2; this is a narrower head-to-head signal than the composite indexes.

On price, Kimi K3.1 Pro is roughly 4.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Kimi K3.1 Pro also accepts a larger context window (1,048,576 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 agents — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results
  • you want the most recent training data — it shipped Nov 2026

Choose Kimi K3.1 Pro

  • cost matters — it's about 4.0x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • 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 K3.1 Pro
Moonshot AI
Core performance indexes
LLM Stats Score
59.6
#2
55.1
#7
Reasoning
53.3
#8
53.9
#6
Coding
45.1
#5
41.7
#12
Agents
44.6
#2
40.9
#7
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
$8.00 / M
$2.00 / M
Output price
$40.00 / M
$10.00 / M
Context window
1,000,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Claude Mythos 5.2
Kimi K3.1 Pro
Vision
31.5#33
40.2#5
Tool use
38.0#1
29.6#21
Multimodal
31.7#29
40.4#3
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Claude Mythos 5.2 · 30 for Kimi K3.1 Pro

2 shared

Claude Mythos 5.2 outperforms in 2 benchmarks (Terminal-Bench 4.0, Terminal-Bench-Science 0.1), while Kimi K3.1 Pro is better at 0 benchmarks.

Claude Mythos 5.2 significantly outperforms across most benchmarks.

Wed Nov 11 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Kimi K3.1 Pro costs less

For input processing, Claude Mythos 5.2 ($8.00/1M tokens) is 4.0x more expensive than Kimi K3.1 Pro ($2.00/1M tokens).

For output processing, Claude Mythos 5.2 ($40.00/1M tokens) is 4.0x more expensive than Kimi K3.1 Pro ($10.00/1M tokens).

In conclusion, Claude Mythos 5.2 is more expensive than Kimi K3.1 Pro.*

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

Lowest available price from all providers
Wed Nov 11 2026 • llm-stats.com
Anthropic
Claude Mythos 5.2
Input tokens$8.00
Output tokens$40.00
Best providerAnthropic
Moonshot AI
Kimi K3.1 Pro
Input tokens$2.00
Output tokens$10.00
Best providerFireworks
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Kimi K3.1 Pro accepts 1,048,576 input tokens compared to Claude Mythos 5.2's 1,000,000 tokens. Kimi K3.1 Pro can generate longer responses up to 1,048,576 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 K3.1 Pro
Input1,048,576 tokens
Output1,048,576 tokens
Wed Nov 11 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.2 and Kimi K3.1 Pro support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Mythos 5.2

Text
Images
Audio
Video

Kimi K3.1 Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.2 is licensed under a proprietary license, while Kimi K3.1 Pro uses Kimi K3.1 Pro License.

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

Claude Mythos 5.2

Proprietary

Closed source

Kimi K3.1 Pro

Kimi K3.1 Pro License

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.2 was released on 2026-11-09, while Kimi K3.1 Pro was released on 2026-10-23.

Claude Mythos 5.2 is 1 month newer than Kimi K3.1 Pro.

Claude Mythos 5.2

Nov 9, 2026

0 days ago

2w newer
Kimi K3.1 Pro

Oct 23, 2026

2 weeks ago

Knowledge Cutoff

When training data ends

Claude Mythos 5.2 has a documented knowledge cutoff of 2026-06-01, while Kimi K3.1 Pro'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 K3.1 Pro's cutoff date.

Claude Mythos 5.2

Jun 2026

Kimi K3.1 Pro

—

Provider Availability

Claude Mythos 5.2 is available from Anthropic. Kimi K3.1 Pro is available from Fireworks, Moonshot AI, Together.

Claude Mythos 5.2

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

Kimi K3.1 Pro

fireworks logo
Fireworks
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
moonshot logo
Unknown Organization
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
together logo
Together
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
* 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 K3.1 Pro side-by-side, then vote on the output you prefer.

Claude Mythos 5.2
✓ Preferred
Kimi K3.1 Pro
Open in Playground

FAQ

Common questions about Claude Mythos 5.2 vs Kimi K3.1 Pro.

Which is better, Claude Mythos 5.2 or Kimi K3.1 Pro?

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to 55.1. Claude Mythos 5.2 is made by Anthropic and Kimi K3.1 Pro 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 K3.1 Pro 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 K3.1 Pro scores BabyVision: 95.4%, GPQA: 94.2%, BenchCAD (with Python tool): 92.7%, BrowseComp: 92.1%, Chartography: 90.2%.

Is Claude Mythos 5.2 cheaper than Kimi K3.1 Pro?

Kimi K3.1 Pro is 4.0x cheaper for input tokens. Claude Mythos 5.2 costs $8.00/M input and $40.00/M output via anthropic. Kimi K3.1 Pro costs $2.00/M input and $10.00/M output via fireworks.

What are the context window sizes for Claude Mythos 5.2 and Kimi K3.1 Pro?

Claude Mythos 5.2 supports 1.0M tokens and Kimi K3.1 Pro supports 1.0M 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 K3.1 Pro?

Key differences include LLM Stats Score (59.6 vs 55.1), context window (1.0M vs 1.0M), input pricing ($8.00 vs $2.00/M), licensing (Proprietary vs Kimi K3.1 Pro License). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.2 and Kimi K3.1 Pro?

Claude Mythos 5.2 is developed by Anthropic and Kimi K3.1 Pro is developed by Moonshot AI.

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