Model Comparison

Claude Fable 5 vs Kimi K3Which is better in 2026?

Claude Fable 5 has a slight edge in benchmark performance. Kimi K3 is 3.3x cheaper per token.

Verdict: Claude Fable 5 vs Kimi K3 — which is better?

Claude Fable 5 (by Anthropic) and Kimi K3 (by Moonshot AI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Fable 5 outperforms in 3 benchmarks (FrontierSWE, GDPval-AA, Humanity's Last Exam), while Kimi K3 is better at 2 benchmarks (AutomationBench, Terminal-Bench 2.1). Claude Fable 5 has a slight edge in benchmark performance.

On price, Kimi K3 is roughly 3.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Kimi K3 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Fable 5 if…

  • you want the strongest raw capability — it leads on 3 of 5 shared benchmarks

Choose Kimi K3 if…

  • cost matters — it's about 3.3x 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 Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Claude Fable 5 outperforms in 3 benchmarks (FrontierSWE, GDPval-AA, Humanity's Last Exam), while Kimi K3 is better at 2 benchmarks (AutomationBench, Terminal-Bench 2.1).

Claude Fable 5 has a slight edge in benchmark performance.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K3 costs less

For input processing, Claude Fable 5 ($10.00/1M tokens) is 3.3x more expensive than Kimi K3 ($3.00/1M tokens).

For output processing, Claude Fable 5 ($50.00/1M tokens) is 3.3x more expensive than Kimi K3 ($15.00/1M tokens).

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

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

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
Anthropic
Claude Fable 5
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
Moonshot AI
Kimi K3
Input tokens$3.00
Output tokens$15.00
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Kimi K3 accepts 1,048,576 input tokens compared to Claude Fable 5's 1,000,000 tokens. Kimi K3 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
Input1,048,576 tokens
Output1,048,576 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Fable 5 and Kimi K3 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

Text
Images
Audio
Video

Release Timeline

When each model was launched

Claude Fable 5 was released on 2026-06-09, while Kimi K3 was released on 2026-07-16.

Kimi K3 is 1 month newer than Claude Fable 5.

Claude Fable 5

Jun 9, 2026

1 months ago

Kimi K3

Jul 16, 2026

1 days ago

1mo 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. Kimi K3 is available from Moonshot AI.

Claude Fable 5

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

Kimi K3

moonshot logo
Unknown Organization
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Higher FrontierSWE score (90.0% vs 81.2%)
Higher GDPval-AA score (60.5% vs 55.6%)
Higher Humanity's Last Exam score (64.5% vs 56.0%)
Moonshot AI
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher AutomationBench score (30.8% vs 17.4%)
Higher Terminal-Bench 2.1 score (88.3% vs 84.3%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Fable 5 and Kimi K3 side-by-side, then vote on the output you prefer.

Claude Fable 5
✓ Preferred
Kimi K3
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Fable 5
Moonshot AI
Kimi K3

FAQ

Common questions about Claude Fable 5 vs Kimi K3.

Which is better, Claude Fable 5 or Kimi K3?

Claude Fable 5 has a slight edge in benchmark performance. Claude Fable 5 is made by Anthropic and Kimi K3 is made by Moonshot AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Fable 5 compare to Kimi K3 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 scores MathVision: 97.8%, DeepSearchQA: 95.0%, GPQA: 93.5%, CharXiv-R: 91.3%, BrowseComp: 91.2%.

Is Claude Fable 5 cheaper than Kimi K3?

Kimi K3 is 3.3x cheaper for input tokens. Claude Fable 5 costs $10.00/M input and $50.00/M output via anthropic. Kimi K3 costs $3.00/M input and $15.00/M output via moonshot.

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

Claude Fable 5 supports 1.0M tokens and Kimi K3 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?

Key differences include context window (1.0M vs 1.0M), input pricing ($10.00 vs $3.00/M), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Fable 5 and Kimi K3?

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

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