Model Comparison

Claude Opus 4.5 vs Kimi K2.6Which is better in 2026?

Both models are evenly matched across the benchmarks. Kimi K2.6 is 7.0x cheaper per token.

Verdict: Claude Opus 4.5 vs Kimi K2.6 — which is better?

Claude Opus 4.5 (by Anthropic) and Kimi K2.6 (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 Opus 4.5 outperforms in 2 benchmarks (LiveBench, SWE-Bench Verified), while Kimi K2.6 is better at 2 benchmarks (GPQA, Terminal-Bench 2.0). Both models are evenly matched across the benchmarks.

On price, Kimi K2.6 is roughly 7.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Kimi K2.6 also accepts a larger context window (262,144 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Opus 4.5 if…

  • you want predictable pricing at $5.00/M input and $25.00/M output

Choose Kimi K2.6 if…

  • cost matters — it's about 7.0x cheaper per token
  • you process long inputs — it offers a 262,144 token context window
  • you want the most recent training data — it shipped Apr 2026
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Claude Opus 4.5 outperforms in 2 benchmarks (LiveBench, SWE-Bench Verified), while Kimi K2.6 is better at 2 benchmarks (GPQA, Terminal-Bench 2.0).

Both models are evenly matched across the benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K2.6 costs less

For input processing, Claude Opus 4.5 ($5.00/1M tokens) is 6.7x more expensive than Kimi K2.6 ($0.75/1M tokens).

For output processing, Claude Opus 4.5 ($25.00/1M tokens) is 7.1x more expensive than Kimi K2.6 ($3.50/1M tokens).

In conclusion, Claude Opus 4.5 is more expensive than Kimi K2.6.*

* 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 Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
Moonshot AI
Kimi K2.6
Input tokens$0.75
Output tokens$3.50
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Kimi K2.6 accepts 262,144 input tokens compared to Claude Opus 4.5's 200,000 tokens. Kimi K2.6 can generate longer responses up to 131,072 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.

Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
Moonshot AI
Kimi K2.6
Input262,144 tokens
Output131,072 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.5 and Kimi K2.6 support multimodal inputs.

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

Claude Opus 4.5

Text
Images
Audio
Video

Kimi K2.6

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 4.5 is licensed under a proprietary license, while Kimi K2.6 uses Modified MIT License.

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

Claude Opus 4.5

Proprietary

Closed source

Kimi K2.6

Modified MIT License

Open weights

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while Kimi K2.6 was released on 2026-04-20.

Kimi K2.6 is 5 months newer than Claude Opus 4.5.

Claude Opus 4.5

Nov 24, 2025

7 months ago

Kimi K2.6

Apr 20, 2026

2 months ago

4mo newer

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a documented knowledge cutoff of 2025-03-31, while Kimi K2.6's cutoff date is not specified.

We can confirm Claude Opus 4.5's training data extends to 2025-03-31, but cannot make a direct comparison without Kimi K2.6's cutoff date.

Claude Opus 4.5

Mar 2025

Kimi K2.6

—

Provider Availability

Claude Opus 4.5 is available from Anthropic. Kimi K2.6 is available from DeepInfra, Fireworks, Moonshot AI, Novita, Together.

Claude Opus 4.5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

Kimi K2.6

deepinfra logo
Deepinfra
Input Price:Input: $0.75/1MOutput Price:Output: $3.50/1M
fireworks logo
Fireworks
Input Price:Input: $0.95/1MOutput Price:Output: $4.00/1M
moonshot logo
Unknown Organization
Input Price:Input: $0.95/1MOutput Price:Output: $4.00/1M
novita logo
Novita
Input Price:Input: $0.95/1MOutput Price:Output: $4.00/1M
together logo
Together
Input Price:Input: $1.20/1MOutput Price:Output: $4.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Higher LiveBench score (76.0% vs 72.2%)
Higher SWE-Bench Verified score (80.9% vs 80.2%)
Moonshot AI
Larger context window (262,144 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher GPQA score (90.5% vs 87.0%)
Higher Terminal-Bench 2.0 score (66.7% vs 59.3%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Opus 4.5 and Kimi K2.6 side-by-side, then vote on the output you prefer.

Claude Opus 4.5
✓ Preferred
Kimi K2.6
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.5
Moonshot AI
Kimi K2.6

FAQ

Common questions about Claude Opus 4.5 vs Kimi K2.6.

Which is better, Claude Opus 4.5 or Kimi K2.6?

Both models are evenly matched across the benchmarks. Claude Opus 4.5 is made by Anthropic and Kimi K2.6 is made by Moonshot AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 4.5 compare to Kimi K2.6 in benchmarks?

Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%. Kimi K2.6 scores V*: 96.9%, AIME 2026: 96.4%, MathVision: 93.2%, HMMT Feb 26: 92.7%, GPQA: 90.5%.

Is Claude Opus 4.5 cheaper than Kimi K2.6?

Kimi K2.6 is 6.7x cheaper for input tokens. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic. Kimi K2.6 costs $0.75/M input and $3.50/M output via deepinfra.

What are the context window sizes for Claude Opus 4.5 and Kimi K2.6?

Claude Opus 4.5 supports 200K tokens and Kimi K2.6 supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 4.5 and Kimi K2.6?

Key differences include context window (200K vs 262K), input pricing ($5.00 vs $0.75/M), licensing (Proprietary vs Modified MIT License). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 4.5 and Kimi K2.6?

Claude Opus 4.5 is developed by Anthropic and Kimi K2.6 is developed by Moonshot AI.

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