GPT-5.4 vs DeepSeek V3.2 (Reasoner)
Pricing, context window, and benchmark comparison · Last updated April 2026
DeepSeek V3.2 (Reasoner) is cheaper than GPT-5.4 at $0.28/1M/1M vs $2.50/1M/1M input tokens — a 8.9x cost difference. GPT-5.4 scores higher on quality benchmarks (ELO 1420). Choose DeepSeek V3.2 (Reasoner) for cost-sensitive workloads; choose GPT-5.4 for maximum quality.
Which is cheaper: GPT-5.4 or DeepSeek V3.2 (Reasoner)?
DeepSeek V3.2 (Reasoner) is the cheaper option at $0.28/1M per 1M input tokens, compared to $2.50/1M for GPT-5.4. That is a 8.9x cost difference on input tokens. Output pricing follows a similar pattern: GPT-5.4 charges $15.00/1M/1M vs $0.42/1M/1M for DeepSeek V3.2 (Reasoner).
Which has better quality: GPT-5.4 or DeepSeek V3.2 (Reasoner)?
Based on LMSYS Chatbot Arena rankings, GPT-5.4 achieves a higher ELO score (1420 vs 1385), suggesting stronger performance on open-ended tasks. GPT-5.4 excels at openai flagship — top-tier reasoning, coding, and multimodal. DeepSeek V3.2 (Reasoner) is known for o-series-class reasoning at a fraction of the price.
Which should you choose: GPT-5.4 or DeepSeek V3.2 (Reasoner)?
- → OpenAI flagship — top-tier reasoning, coding, and multimodal
- → Native computer use and tool search
- → 272K standard context (expandable to 1M)
- → o-series-class reasoning at a fraction of the price
- → Up to 64K output tokens for long chain-of-thought
- → Open weights
Frequently Asked Questions
Which is cheaper: GPT-5.4 or DeepSeek V3.2 (Reasoner)?
DeepSeek V3.2 (Reasoner) is cheaper at $0.28/1M per 1M input tokens, making it 8.9x more affordable.
Which has better quality: GPT-5.4 or DeepSeek V3.2 (Reasoner)?
GPT-5.4 scores higher on the LMSYS Chatbot Arena with an ELO of 1420, suggesting better overall quality for most tasks.
Which has a larger context window: GPT-5.4 or DeepSeek V3.2 (Reasoner)?
GPT-5.4 has a larger context window at 272K tokens.
Should I choose GPT-5.4 or DeepSeek V3.2 (Reasoner)?
Choose DeepSeek V3.2 (Reasoner) if cost is the priority. Choose GPT-5.4 if benchmark quality is most important. Consider your specific use case: GPT-5.4 is best for coding and reasoning, while DeepSeek V3.2 (Reasoner) excels at reasoning and math.
Is GPT-5.4 or DeepSeek V3.2 (Reasoner) open source?
GPT-5.4 is proprietary. DeepSeek V3.2 (Reasoner) is open source.