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Model Comparison

GPT-5.4 vs DeepSeek-V4-Flash-Max

GPT-5.4 shows notably better performance in the majority of benchmarks. DeepSeek-V4-Flash-Max is 32.1x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

GPT-5.4 outperforms in 5 benchmarks (BrowseComp, GPQA, SWE-Bench Pro, Terminal-Bench 2.0, Toolathlon), while DeepSeek-V4-Flash-Max is better at 2 benchmarks (Humanity's Last Exam, MCP Atlas).

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

Fri Apr 24 2026 • llm-stats.com

Arena Performance

Human preference votes

CallingBox

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Pricing Analysis

Price comparison per million tokens

DeepSeek-V4-Flash-Max costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 17.9x more expensive than DeepSeek-V4-Flash-Max ($0.14/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 53.6x more expensive than DeepSeek-V4-Flash-Max ($0.28/1M tokens).

In conclusion, GPT-5.4 is more expensive than DeepSeek-V4-Flash-Max.*

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

Lowest available price from all providers
Fri Apr 24 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
DeepSeek
DeepSeek-V4-Flash-Max
Input tokens$0.14
Output tokens$0.28
Best providerDeepSeek
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

DeepSeek-V4-Flash-Max accepts 1,048,576 input tokens compared to GPT-5.4's 1,000,000 tokens. DeepSeek-V4-Flash-Max can generate longer responses up to 393,216 tokens, while GPT-5.4 is limited to 128,000 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
DeepSeek
DeepSeek-V4-Flash-Max
Input1,048,576 tokens
Output393,216 tokens
Fri Apr 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.4 supports multimodal inputs, whereas DeepSeek-V4-Flash-Max does not.

GPT-5.4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.4

Text
Images
Audio
Video

DeepSeek-V4-Flash-Max

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.4 is licensed under a proprietary license, while DeepSeek-V4-Flash-Max uses MIT.

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

GPT-5.4

Proprietary

Closed source

DeepSeek-V4-Flash-Max

MIT

Open weights

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while DeepSeek-V4-Flash-Max was released on 2026-04-23.

DeepSeek-V4-Flash-Max is 2 months newer than GPT-5.4.

GPT-5.4

Mar 5, 2026

1 months ago

DeepSeek-V4-Flash-Max

Apr 23, 2026

1 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. DeepSeek-V4-Flash-Max is available from DeepSeek.

GPT-5.4

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

DeepSeek-V4-Flash-Max

deepseek logo
DeepSeek
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Supports multimodal inputs
Higher BrowseComp score (82.7% vs 73.2%)
Higher GPQA score (92.8% vs 88.1%)
Higher SWE-Bench Pro score (57.7% vs 52.6%)
Higher Terminal-Bench 2.0 score (75.1% vs 56.9%)
Higher Toolathlon score (54.6% vs 47.8%)
DeepSeek
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher Humanity's Last Exam score (45.1% vs 39.8%)
Higher MCP Atlas score (69.0% vs 67.2%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
DeepSeek
DeepSeek-V4-Flash-Max

FAQ

Common questions about GPT-5.4 vs DeepSeek-V4-Flash-Max

GPT-5.4 shows notably better performance in the majority of benchmarks. GPT-5.4 is made by OpenAI and DeepSeek-V4-Flash-Max is made by DeepSeek. 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%. DeepSeek-V4-Flash-Max scores CodeForces: 100.0%, HMMT Feb 26: 94.8%, LiveCodeBench: 91.6%, IMO-AnswerBench: 88.4%, GPQA: 88.1%.
DeepSeek-V4-Flash-Max is 17.9x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. DeepSeek-V4-Flash-Max costs $0.14/M input and $0.28/M output via deepseek.
GPT-5.4 supports 1.0M tokens and DeepSeek-V4-Flash-Max supports 1.0M 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 1.0M), input pricing ($2.50 vs $0.14/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.
GPT-5.4 is developed by OpenAI and DeepSeek-V4-Flash-Max is developed by DeepSeek.