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Claude Fable 5 vs Kimi K3.1 Pro

Claude Fable 5 and Kimi K3.1 Pro are closely matched at 52.9 and 55.5 on the LLM Stats Score. Kimi K3.1 Pro is 5.0x cheaper per token.

Anthropic · Moonshot AI · Updated for 2026

Which is better?

Claude Fable 5 and Kimi K3.1 Pro are closely matched on the overall LLM Stats Score at 52.9 and 55.5.

In the 5 individual benchmarks reported for both models, Kimi K3.1 Pro wins 3; this is a narrower head-to-head signal than the composite indexes.

On price, Kimi K3.1 Pro is roughly 5.0x 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 Fable 5

  • you want predictable pricing at $10.00/M input and $50.00/M output

Choose Kimi K3.1 Pro

  • you value its reported benchmark strengths — it wins 3 of 5 exact shared results
  • cost matters — it's about 5.0x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Claude Fable 5
Anthropic
Kimi K3.1 Pro
Moonshot AI
Core performance indexes
LLM Stats Score
52.9
#11
55.5
#5
Reasoning
50.6
#11
54.3
#6
Coding
43.7
#6
42.7
#9
Agents
39.0
#9
41.6
#5
Cost, coverage & limits
Benchmark wins
2 of 5
3 of 5
Input price
$10.00 / M
$2.00 / M
Output price
$50.00 / M
$10.00 / M
Context window
1,000,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

4 shared
Index
Claude Fable 5
Kimi K3.1 Pro
Math
42.0#7
38.6#26
Vision
35.9#13
40.5#4
Tool use
23.8#47
30.4#14
Multimodal
31.9#27
40.8#2
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

19 reported for Claude Fable 5 · 30 for Kimi K3.1 Pro

5 shared

Claude Fable 5 outperforms in 2 benchmarks (ExploitBench, Humanity's Last Exam), while Kimi K3.1 Pro is better at 3 benchmarks (BioMysteryBench, GDP.pdf, Terminal-Bench 4.0).

Kimi K3.1 Pro has a slight edge in benchmark performance.

Thu Oct 29 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 Fable 5 ($10.00/1M tokens) is 5.0x more expensive than Kimi K3.1 Pro ($2.00/1M tokens).

For output processing, Claude Fable 5 ($50.00/1M tokens) is 5.0x more expensive than Kimi K3.1 Pro ($10.00/1M tokens).

In conclusion, Claude Fable 5 is more expensive than Kimi K3.1 Pro.*

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

Lowest available price from all providers
Thu Oct 29 2026 • llm-stats.com
Anthropic
Claude Fable 5
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Moonshot AI
Kimi K3.1 Pro
Input tokens$2.00
Output tokens$10.00
Best providerUnknown Organization
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 Fable 5's 1,000,000 tokens. Kimi K3.1 Pro can generate longer responses up to 1,048,576 tokens, while Claude Fable 5 is limited to 128,000 tokens.

Anthropic
Claude Fable 5
Input1,000,000 tokens
Output128,000 tokens
Moonshot AI
Kimi K3.1 Pro
Input1,048,576 tokens
Output1,048,576 tokens
Thu Oct 29 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Fable 5 and Kimi K3.1 Pro support multimodal inputs.

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

Claude Fable 5

Text
Images
Audio
Video

Kimi K3.1 Pro

Text
Images
Audio
Video

Release Timeline

When each model was launched

Claude Fable 5 was released on 2026-06-09, while Kimi K3.1 Pro was released on 2026-10-23.

Kimi K3.1 Pro is 5 months newer than Claude Fable 5.

Claude Fable 5

Jun 9, 2026

4 months ago

Kimi K3.1 Pro

Oct 23, 2026

6 days ago

4mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Fable 5 is available from Anthropic, DeepInfra. Kimi K3.1 Pro is available from Moonshot AI.

Claude Fable 5

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M
deepinfra logo
Deepinfra
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M

Kimi K3.1 Pro

moonshot logo
Unknown Organization
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 Fable 5 and Kimi K3.1 Pro side-by-side, then vote on the output you prefer.

Claude Fable 5
✓ Preferred
Kimi K3.1 Pro
Open in Playground

FAQ

Common questions about Claude Fable 5 vs Kimi K3.1 Pro.

Which is better, Claude Fable 5 or Kimi K3.1 Pro?

Claude Fable 5 and Kimi K3.1 Pro are closely matched on the LLM Stats Score at 52.9 and 55.5. Claude Fable 5 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 Fable 5 compare to Kimi K3.1 Pro in benchmarks?

Claude Fable 5 scores SWE-Bench Verified: 95.0%, FrontierSWE: 90.0%, OSWorld-Verified: 85.0%, Terminal-Bench 2.1: 84.3%, SWE-Bench Pro: 80.0%. 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 Fable 5 cheaper than Kimi K3.1 Pro?

Kimi K3.1 Pro is 5.0x cheaper for input tokens. Claude Fable 5 costs $10.00/M input and $50.00/M output via anthropic. Kimi K3.1 Pro costs $2.00/M input and $10.00/M output via moonshot.

What are the context window sizes for Claude Fable 5 and Kimi K3.1 Pro?

Claude Fable 5 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 Fable 5 and Kimi K3.1 Pro?

Key differences include LLM Stats Score (52.9 vs 55.5), context window (1.0M vs 1.0M), input pricing ($10.00 vs $2.00/M), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5 and Kimi K3.1 Pro?

Claude Fable 5 is developed by Anthropic and Kimi K3.1 Pro is developed by Moonshot AI.

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