Model Comparison

Kimi K3 vs Claude Fable 5Which is better in 2026?

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

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

Kimi K3 (by Moonshot AI) and Claude Fable 5 (by Anthropic) 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.

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

Choose Claude Fable 5 if…

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

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

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

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, Kimi K3 ($3.00/1M tokens) is 3.3x cheaper than Claude Fable 5 ($10.00/1M tokens).

For output processing, Kimi K3 ($15.00/1M tokens) is 3.3x cheaper than Claude Fable 5 ($50.00/1M 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
Moonshot AI
Kimi K3
Input tokens$3.00
Output tokens$15.00
Best providerUnknown Organization
Anthropic
Claude Fable 5
Input tokens$10.00
Output tokens$50.00
Best providerAnthropic
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.

Moonshot AI
Kimi K3
Input1,048,576 tokens
Output1,048,576 tokens
Anthropic
Claude Fable 5
Input1,000,000 tokens
Output128,000 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Kimi K3 and Claude Fable 5 support multimodal inputs.

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

Kimi K3

Text
Images
Audio
Video

Claude Fable 5

Text
Images
Audio
Video

Release Timeline

When each model was launched

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

Kimi K3 is 1 month newer than Claude Fable 5.

Kimi K3

Jul 16, 2026

1 days ago

1mo newer
Claude Fable 5

Jun 9, 2026

1 months ago

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

Kimi K3 is available from Moonshot AI. Claude Fable 5 is available from Anthropic.

Kimi K3

moonshot logo
Unknown Organization
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Claude Fable 5

anthropic logo
Anthropic
Input Price:Input: $10.00/1MOutput Price:Output: $50.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

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%)
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%)

Detailed Comparison

Interactive Arena

Judge for yourself.

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

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

FAQ

Common questions about Kimi K3 vs Claude Fable 5.

Which is better, Kimi K3 or Claude Fable 5?

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

How does Kimi K3 compare to Claude Fable 5 in benchmarks?

Kimi K3 scores MathVision: 97.8%, DeepSearchQA: 95.0%, GPQA: 93.5%, CharXiv-R: 91.3%, BrowseComp: 91.2%. 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%.

Is Kimi K3 cheaper than Claude Fable 5?

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

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

Kimi K3 supports 1.0M tokens and Claude Fable 5 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 Kimi K3 and Claude Fable 5?

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

Who makes Kimi K3 and Claude Fable 5?

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

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