Model Comparison
DeepSeek-V3 0324 vs GPT-4.5Which is better in 2026?
Both models are evenly matched across the benchmarks. DeepSeek-V3 0324 is 189.4x cheaper per token.
Verdict: DeepSeek-V3 0324 vs GPT-4.5 — which is better?
DeepSeek-V3 0324 (by DeepSeek) and GPT-4.5 (by OpenAI) 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.
DeepSeek-V3 0324 outperforms in 1 benchmarks (AIME 2024), while GPT-4.5 is better at 1 benchmark (GPQA). Both models are evenly matched across the benchmarks.
On price, DeepSeek-V3 0324 is roughly 189.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
DeepSeek-V3 0324 also accepts a larger context window (163,840 input tokens), making it the stronger choice for long documents and large codebases.
Choose DeepSeek-V3 0324 if…
- cost matters — it's about 189.4x cheaper per token
- you process long inputs — it offers a 163,840 token context window
- you want the most recent training data — it shipped Mar 2025
- you need open weights you can self-host or fine-tune
Choose GPT-4.5 if…
- you want predictable pricing at $75.00/M input and $150.00/M output
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-V3 0324 outperforms in 1 benchmarks (AIME 2024), while GPT-4.5 is better at 1 benchmark (GPQA).
Both models are evenly matched across the benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V3 0324 ($0.28/1M tokens) is 267.9x cheaper than GPT-4.5 ($75.00/1M tokens).
For output processing, DeepSeek-V3 0324 ($1.14/1M tokens) is 131.6x cheaper than GPT-4.5 ($150.00/1M tokens).
In conclusion, GPT-4.5 is more expensive than DeepSeek-V3 0324.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
DeepSeek-V3 0324 accepts 163,840 input tokens compared to GPT-4.5's 128,000 tokens. DeepSeek-V3 0324 can generate longer responses up to 163,840 tokens, while GPT-4.5 is limited to 4,096 tokens.
Input Capabilities
Supported data types and modalities
GPT-4.5 supports multimodal inputs, whereas DeepSeek-V3 0324 does not.
GPT-4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
DeepSeek-V3 0324
GPT-4.5
License
Usage and distribution terms
DeepSeek-V3 0324 is licensed under MIT + Model License (Commercial use allowed), while GPT-4.5 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT + Model License (Commercial use allowed)
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
DeepSeek-V3 0324 was released on 2025-03-25, while GPT-4.5 was released on 2025-02-27.
DeepSeek-V3 0324 is 1 month newer than GPT-4.5.
Mar 25, 2025
1.4 years ago
3w newerFeb 27, 2025
1.4 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
DeepSeek-V3 0324 is available from Novita. GPT-4.5 is available from OpenAI.
DeepSeek-V3 0324
GPT-4.5
Outputs Comparison
Key Takeaways
DeepSeek-V3 0324
View detailsDeepSeek
GPT-4.5
View detailsOpenAI
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against DeepSeek-V3 0324 and GPT-4.5 side-by-side, then vote on the output you prefer.
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FAQ
Common questions about DeepSeek-V3 0324 vs GPT-4.5.