Model Comparison

GPT-5.4 vs Kimi K2.6

GPT-5.4 shows notably better performance in the majority of benchmarks. Kimi K2.6 is 3.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

8 benchmarks

GPT-5.4 outperforms in 6 benchmarks (GPQA, Humanity's Last Exam, MMMU-Pro, OSWorld-Verified, Terminal-Bench 2.0, Toolathlon), while Kimi K2.6 is better at 2 benchmarks (BrowseComp, SWE-Bench Pro).

GPT-5.4 shows notably better performance in the majority of benchmarks.

Mon Apr 20 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K2.6 costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 2.6x more expensive than Kimi K2.6 ($0.95/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 3.8x more expensive than Kimi K2.6 ($4.00/1M tokens).

In conclusion, GPT-5.4 is more expensive than Kimi K2.6.*

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

Lowest available price from all providers
Mon Apr 20 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
Moonshot AI
Kimi K2.6
Input tokens$0.95
Output tokens$4.00
Best providerUnknown Organization
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Context Window

Maximum input and output token capacity

GPT-5.4 accepts 1,000,000 input tokens compared to Kimi K2.6's 262,144 tokens. Kimi K2.6 can generate longer responses up to 262,144 tokens, while GPT-5.4 is limited to 128,000 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
Moonshot AI
Kimi K2.6
Input262,144 tokens
Output262,144 tokens
Mon Apr 20 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.4 and Kimi K2.6 support multimodal inputs.

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

GPT-5.4

Text
Images
Audio
Video

Kimi K2.6

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.4 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.

GPT-5.4

Proprietary

Closed source

Kimi K2.6

Modified MIT License

Open weights

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while Kimi K2.6 was released on 2026-04-20.

Kimi K2.6 is 2 months newer than GPT-5.4.

GPT-5.4

Mar 5, 2026

1 months ago

Kimi K2.6

Apr 20, 2026

0 days ago

1mo 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

GPT-5.4 is available from OpenAI. Kimi K2.6 is available from Moonshot AI, Novita.

GPT-5.4

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Kimi K2.6

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
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (1,000,000 tokens)
Higher GPQA score (92.8% vs 90.5%)
Higher Humanity's Last Exam score (39.8% vs 36.4%)
Higher MMMU-Pro score (81.2% vs 80.1%)
Higher OSWorld-Verified score (75.0% vs 73.1%)
Higher Terminal-Bench 2.0 score (75.1% vs 66.7%)
Higher Toolathlon score (54.6% vs 50.0%)
Moonshot AI
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher BrowseComp score (86.3% vs 82.7%)
Higher SWE-Bench Pro score (58.6% vs 57.7%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
Moonshot AI
Kimi K2.6

FAQ

Common questions about GPT-5.4 vs Kimi K2.6

GPT-5.4 shows notably better performance in the majority of benchmarks. GPT-5.4 is made by OpenAI 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.
GPT-5.4 scores Tau2 Telecom: 98.9%, ARC-AGI: 93.7%, Graphwalks BFS <128k: 93.0%, GPQA: 92.8%, Graphwalks parents <128k: 89.8%. Kimi K2.6 scores V*: 96.9%, AIME 2026: 96.4%, MathVision: 93.2%, HMMT Feb 26: 92.7%, GPQA: 90.5%.
Kimi K2.6 is 2.6x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. Kimi K2.6 costs $0.95/M input and $4.00/M output via moonshot.
GPT-5.4 supports 1.0M tokens and Kimi K2.6 supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (1.0M vs 262K), input pricing ($2.50 vs $0.95/M), licensing (Proprietary vs Modified MIT License). See the full comparison above for benchmark-by-benchmark results.
GPT-5.4 is developed by OpenAI and Kimi K2.6 is developed by Moonshot AI.