Model Comparison

GPT-5.2 vs Kimi K2.5

GPT-5.2 shows notably better performance in the majority of benchmarks. Kimi K2.5 is 4.5x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

9 benchmarks

GPT-5.2 outperforms in 6 benchmarks (AIME 2025, CharXiv-R, GPQA, HMMT 2025, MMMU-Pro, SWE-Bench Verified), while Kimi K2.5 is better at 3 benchmarks (BrowseComp, Humanity's Last Exam, VideoMMMU).

GPT-5.2 shows notably better performance in the majority of benchmarks.

Thu Apr 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, GPT-5.2 ($1.75/1M tokens) is 2.9x more expensive than Kimi K2.5 ($0.60/1M tokens).

For output processing, GPT-5.2 ($14.00/1M tokens) is 5.6x more expensive than Kimi K2.5 ($2.50/1M tokens).

In conclusion, GPT-5.2 is more expensive than Kimi K2.5.*

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

Lowest available price from all providers
Thu Apr 16 2026 • llm-stats.com
OpenAI
GPT-5.2
Input tokens$1.75
Output tokens$14.00
Best providerOpenAI
Moonshot AI
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

GPT-5.2 accepts 400,000 input tokens compared to Kimi K2.5's 262,100 tokens. Kimi K2.5 can generate longer responses up to 262,100 tokens, while GPT-5.2 is limited to 128,000 tokens.

OpenAI
GPT-5.2
Input400,000 tokens
Output128,000 tokens
Moonshot AI
Kimi K2.5
Input262,100 tokens
Output262,100 tokens
Thu Apr 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.2 and Kimi K2.5 support multimodal inputs.

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

GPT-5.2

Text
Images
Audio
Video

Kimi K2.5

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.2 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.

GPT-5.2

Proprietary

Closed source

Kimi K2.5

MIT

Open weights

Release Timeline

When each model was launched

GPT-5.2 was released on 2025-12-11, while Kimi K2.5 was released on 2026-01-27.

Kimi K2.5 is 2 months newer than GPT-5.2.

GPT-5.2

Dec 11, 2025

4 months ago

Kimi K2.5

Jan 27, 2026

2 months ago

1mo newer

Knowledge Cutoff

When training data ends

GPT-5.2 has a documented knowledge cutoff of 2025-08-25, while Kimi K2.5's cutoff date is not specified.

We can confirm GPT-5.2's training data extends to 2025-08-25, but cannot make a direct comparison without Kimi K2.5's cutoff date.

GPT-5.2

Aug 2025

Kimi K2.5

—

Provider Availability

GPT-5.2 is available from OpenAI. Kimi K2.5 is available from Fireworks.

GPT-5.2

openai logo
OpenAI
Input Price:Input: $1.75/1MOutput Price:Output: $14.00/1M

Kimi K2.5

fireworks logo
Fireworks
Input Price:Input: $0.60/1MOutput Price:Output: $2.50/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (400,000 tokens)
Higher AIME 2025 score (100.0% vs 96.1%)
Higher CharXiv-R score (82.1% vs 77.5%)
Higher GPQA score (92.4% vs 87.6%)
Higher HMMT 2025 score (99.4% vs 95.4%)
Higher MMMU-Pro score (79.5% vs 78.5%)
Higher SWE-Bench Verified score (80.0% vs 76.8%)
Moonshot AI
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher BrowseComp score (74.9% vs 65.8%)
Higher Humanity's Last Exam score (50.2% vs 34.5%)
Higher VideoMMMU score (86.6% vs 85.9%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.2
Moonshot AI
Kimi K2.5

FAQ

Common questions about GPT-5.2 vs Kimi K2.5

GPT-5.2 shows notably better performance in the majority of benchmarks. GPT-5.2 is made by OpenAI and Kimi K2.5 is made by Moonshot AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT-5.2 scores AIME 2025: 100.0%, HMMT 2025: 99.4%, Tau2 Telecom: 98.7%, Graphwalks BFS <128k: 94.0%, GPQA: 92.4%. Kimi K2.5 scores AIME 2025: 96.1%, HMMT 2025: 95.4%, InfoVQAtest: 92.6%, OCRBench: 92.3%, MathVista-Mini: 90.1%.
Kimi K2.5 is 2.9x cheaper for input tokens. GPT-5.2 costs $1.75/M input and $14.00/M output via openai. Kimi K2.5 costs $0.60/M input and $2.50/M output via fireworks.
GPT-5.2 supports 400K tokens and Kimi K2.5 supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (400K vs 262K), input pricing ($1.75 vs $0.60/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.
GPT-5.2 is developed by OpenAI and Kimi K2.5 is developed by Moonshot AI.