DeepSeek V3.2 (Reasoner) vs GPT-5.4 mini
Pricing, context window, and benchmark comparison · Last updated April 2026
DeepSeek V3.2 (Reasoner) is cheaper than GPT-5.4 mini at $0.28/1M/1M vs $0.75/1M/1M input tokens — a 2.7x cost difference. DeepSeek V3.2 (Reasoner) scores higher on quality benchmarks (ELO 1385). Choose DeepSeek V3.2 (Reasoner) for cost-sensitive workloads; both are strong choices depending on your budget.
Which is cheaper: DeepSeek V3.2 (Reasoner) or GPT-5.4 mini?
DeepSeek V3.2 (Reasoner) is the cheaper option at $0.28/1M per 1M input tokens, compared to $0.75/1M for GPT-5.4 mini. That is a 2.7x cost difference on input tokens. Output pricing follows a similar pattern: DeepSeek V3.2 (Reasoner) charges $0.42/1M/1M vs $4.50/1M/1M for GPT-5.4 mini.
Which has better quality: DeepSeek V3.2 (Reasoner) or GPT-5.4 mini?
Based on LMSYS Chatbot Arena rankings, DeepSeek V3.2 (Reasoner) achieves a higher ELO score (1385 vs 1360), suggesting stronger performance on open-ended tasks. DeepSeek V3.2 (Reasoner) excels at o-series-class reasoning at a fraction of the price. GPT-5.4 mini is known for strong mid-tier quality close to gpt-5.4 at 1/3 the price.
Which should you choose: DeepSeek V3.2 (Reasoner) or GPT-5.4 mini?
- → o-series-class reasoning at a fraction of the price
- → Up to 64K output tokens for long chain-of-thought
- → Open weights
- → Strong mid-tier quality close to GPT-5.4 at 1/3 the price
- → Fast inference and low latency
- → Same 272K context window as flagship
Frequently Asked Questions
Which is cheaper: DeepSeek V3.2 (Reasoner) or GPT-5.4 mini?
DeepSeek V3.2 (Reasoner) is cheaper at $0.28/1M per 1M input tokens, making it 2.7x more affordable.
Which has better quality: DeepSeek V3.2 (Reasoner) or GPT-5.4 mini?
DeepSeek V3.2 (Reasoner) scores higher on the LMSYS Chatbot Arena with an ELO of 1385, suggesting better overall quality for most tasks.
Which has a larger context window: DeepSeek V3.2 (Reasoner) or GPT-5.4 mini?
GPT-5.4 mini has a larger context window at 272K tokens.
Should I choose DeepSeek V3.2 (Reasoner) or GPT-5.4 mini?
Choose DeepSeek V3.2 (Reasoner) if cost is the priority. Choose DeepSeek V3.2 (Reasoner) if benchmark quality is most important. Consider your specific use case: DeepSeek V3.2 (Reasoner) is best for reasoning and math, while GPT-5.4 mini excels at customer-support and data-extraction.
Is DeepSeek V3.2 (Reasoner) or GPT-5.4 mini open source?
DeepSeek V3.2 (Reasoner) is open source. GPT-5.4 mini is proprietary.