Model Comparison
GPT-5.2 Pro vs Kimi K3Which is better in 2026?
Kimi K3 significantly outperforms across most benchmarks. Kimi K3 is 9.6x cheaper per token.
Verdict: GPT-5.2 Pro vs Kimi K3 — which is better?
GPT-5.2 Pro (by OpenAI) and Kimi K3 (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.
GPT-5.2 Pro outperforms in 0 benchmarks, while Kimi K3 is better at 3 benchmarks (BrowseComp, GPQA, Humanity's Last Exam). Kimi K3 significantly outperforms across most benchmarks.
On price, Kimi K3 is roughly 9.6x 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 GPT-5.2 Pro if…
- you want predictable pricing at $21.00/M input and $168.00/M output
Choose Kimi K3 if…
- you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
- cost matters — it's about 9.6x 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
- you need open weights you can self-host or fine-tune
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.2 Pro outperforms in 0 benchmarks, while Kimi K3 is better at 3 benchmarks (BrowseComp, GPQA, Humanity's Last Exam).
Kimi K3 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.2 Pro ($21.00/1M tokens) is 7.0x more expensive than Kimi K3 ($3.00/1M tokens).
For output processing, GPT-5.2 Pro ($168.00/1M tokens) is 11.2x more expensive than Kimi K3 ($15.00/1M tokens).
In conclusion, GPT-5.2 Pro is more expensive than Kimi K3.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Kimi K3 accepts 1,048,576 input tokens compared to GPT-5.2 Pro's 400,000 tokens. Kimi K3 can generate longer responses up to 1,048,576 tokens, while GPT-5.2 Pro is limited to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-5.2 Pro and Kimi K3 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.2 Pro
Kimi K3
License
Usage and distribution terms
GPT-5.2 Pro is licensed under a proprietary license, while Kimi K3 uses Kimi K3 License.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Kimi K3 License
Open weights
Release Timeline
When each model was launched
GPT-5.2 Pro was released on 2025-12-11, while Kimi K3 was released on 2026-07-16.
Kimi K3 is 7 months newer than GPT-5.2 Pro.
Dec 11, 2025
7 months ago
Jul 16, 2026
3 weeks ago
7mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-5.2 Pro is available from OpenAI. Kimi K3 is available from Fireworks, Moonshot AI, Novita, Together.
GPT-5.2 Pro
Kimi K3
Outputs Comparison
Key Takeaways
GPT-5.2 Pro
View detailsOpenAI
No standout differentiators in the data we have for this pair.
Kimi K3
View detailsMoonshot AI
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against GPT-5.2 Pro and Kimi K3 side-by-side, then vote on the output you prefer.
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FAQ
Common questions about GPT-5.2 Pro vs Kimi K3.