Claude Opus 4 vs Kimi K2.5 Comparison

Comparing Claude Opus 4 and Kimi K2.5 across benchmarks, pricing, and capabilities.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Claude Opus 4 outperforms in 0 benchmarks, while Kimi K2.5 is better at 3 benchmarks (AIME 2025, GPQA, SWE-Bench Verified).

Kimi K2.5 significantly outperforms across most benchmarks.

Mon Mar 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K2.5 costs less

For input processing, Claude Opus 4 ($15.00/1M tokens) is 25.0x more expensive than Kimi K2.5 ($0.60/1M tokens).

For output processing, Claude Opus 4 ($75.00/1M tokens) is 30.0x more expensive than Kimi K2.5 ($2.50/1M tokens).

In conclusion, Claude Opus 4 is more expensive than Kimi K2.5.*

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

Lowest available price from all providers

Mon Mar 16 2026 • llm-stats.com

Claude Opus 4

Input tokens$15.00

Output tokens$75.00

Best providerAnthropic

Kimi K2.5

Input tokens$0.60

Output tokens$2.50

Best providerFireworks

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Kimi K2.5 accepts 262,100 input tokens compared to Claude Opus 4's 200,000 tokens. Kimi K2.5 can generate longer responses up to 262,100 tokens, while Claude Opus 4 is limited to 32,000 tokens.

Claude Opus 4

Input200,000 tokens

Output32,000 tokens

Kimi K2.5

Input262,100 tokens

Output262,100 tokens

Mon Mar 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4 and Kimi K2.5 support multimodal inputs.

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

Claude Opus 4

Text

Images

Audio

Video

Kimi K2.5

Text

Images

Audio

Video

License

Usage and distribution terms

Claude Opus 4 is licensed under a proprietary license, while Kimi K2.5 uses MIT.

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

Claude Opus 4

Proprietary

Closed source

Kimi K2.5

MIT

Open weights

Release Timeline

When each model was launched

Claude Opus 4 was released on 2025-05-22, while Kimi K2.5 was released on 2026-01-27.

Kimi K2.5 is 8 months newer than Claude Opus 4.

Claude Opus 4

May 22, 2025

9 months ago

Kimi K2.5

Jan 27, 2026

1 months ago

8mo 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 Opus 4 is available from Anthropic, Bedrock, Google. Kimi K2.5 is available from Fireworks. The availability of providers can affect quality of the model and reliability.