Model Comparison

GPT-5.2 Pro vs Kimi K2-Thinking-0905

GPT-5.2 Pro has a slight edge in benchmark performance. Kimi K2-Thinking-0905 is 67.7x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

GPT-5.2 Pro outperforms in 3 benchmarks (BrowseComp, GPQA, HMMT 2025), while Kimi K2-Thinking-0905 is better at 1 benchmark (Humanity's Last Exam).

GPT-5.2 Pro has a slight edge in benchmark performance.

Wed Apr 29 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K2-Thinking-0905 costs less

For input processing, GPT-5.2 Pro ($21.00/1M tokens) is 44.7x more expensive than Kimi K2-Thinking-0905 ($0.47/1M tokens).

For output processing, GPT-5.2 Pro ($168.00/1M tokens) is 84.0x more expensive than Kimi K2-Thinking-0905 ($2.00/1M tokens).

In conclusion, GPT-5.2 Pro is more expensive than Kimi K2-Thinking-0905.*

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

Lowest available price from all providers
Wed Apr 29 2026 • llm-stats.com
OpenAI
GPT-5.2 Pro
Input tokens$21.00
Output tokens$168.00
Best providerOpenAI
Moonshot AI
Kimi K2-Thinking-0905
Input tokens$0.47
Output tokens$2.00
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.2 Pro accepts 400,000 input tokens compared to Kimi K2-Thinking-0905's 262,144 tokens. Kimi K2-Thinking-0905 can generate longer responses up to 262,144 tokens, while GPT-5.2 Pro is limited to 128,000 tokens.

OpenAI
GPT-5.2 Pro
Input400,000 tokens
Output128,000 tokens
Moonshot AI
Kimi K2-Thinking-0905
Input262,144 tokens
Output262,144 tokens
Wed Apr 29 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.2 Pro supports multimodal inputs, whereas Kimi K2-Thinking-0905 does not.

GPT-5.2 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.2 Pro

Text
Images
Audio
Video

Kimi K2-Thinking-0905

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.2 Pro is licensed under a proprietary license, while Kimi K2-Thinking-0905 uses MIT.

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

GPT-5.2 Pro

Proprietary

Closed source

Kimi K2-Thinking-0905

MIT

Open weights

Release Timeline

When each model was launched

GPT-5.2 Pro was released on 2025-12-11, while Kimi K2-Thinking-0905 was released on 2025-09-05.

GPT-5.2 Pro is 3 months newer than Kimi K2-Thinking-0905.

GPT-5.2 Pro

Dec 11, 2025

4 months ago

3mo newer
Kimi K2-Thinking-0905

Sep 5, 2025

7 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

GPT-5.2 Pro is available from OpenAI. Kimi K2-Thinking-0905 is available from DeepInfra, Novita, Fireworks.

GPT-5.2 Pro

openai logo
OpenAI
Input Price:Input: $21.00/1MOutput Price:Output: $168.00/1M

Kimi K2-Thinking-0905

deepinfra logo
Deepinfra
Input Price:Input: $0.47/1MOutput Price:Output: $2.00/1M
novita logo
Novita
Input Price:Input: $0.48/1MOutput Price:Output: $2.00/1M
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)
Supports multimodal inputs
Higher BrowseComp score (77.9% vs 60.2%)
Higher GPQA score (93.2% vs 84.5%)
Higher HMMT 2025 score (100.0% vs 97.5%)
Moonshot AI
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher Humanity's Last Exam score (51.0% vs 36.6%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.2 Pro
Moonshot AI
Kimi K2-Thinking-0905

FAQ

Common questions about GPT-5.2 Pro vs Kimi K2-Thinking-0905

GPT-5.2 Pro has a slight edge in benchmark performance. GPT-5.2 Pro is made by OpenAI and Kimi K2-Thinking-0905 is made by Moonshot AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT-5.2 Pro scores AIME 2025: 100.0%, HMMT 2025: 100.0%, GPQA: 93.2%, ARC-AGI: 90.5%, BrowseComp: 77.9%. Kimi K2-Thinking-0905 scores AIME 2025: 100.0%, HMMT 2025: 97.5%, MMLU-Redux: 94.4%, FRAMES: 87.0%, MMLU-Pro: 84.6%.
Kimi K2-Thinking-0905 is 44.7x cheaper for input tokens. GPT-5.2 Pro costs $21.00/M input and $168.00/M output via openai. Kimi K2-Thinking-0905 costs $0.47/M input and $2.00/M output via deepinfra.
GPT-5.2 Pro supports 400K tokens and Kimi K2-Thinking-0905 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 ($21.00 vs $0.47/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.
GPT-5.2 Pro is developed by OpenAI and Kimi K2-Thinking-0905 is developed by Moonshot AI.