Head-to-head · Updated March 2026
DeepSeek R1 is the model that shocked the AI world in early 2025 — a reasoning model matching o1-level performance at a fraction of the cost. At $0.55/1M input vs GPT-5.4's $2.50/1M, it's 4.5× cheaper. DeepSeek R1 excels at math, logic, and step-by-step reasoning tasks. GPT-5.4 counters with broader capabilities, desktop computer-use, and a more mature API ecosystem. For pure reasoning tasks on a budget, DeepSeek R1 is exceptional. For agentic workflows and general use, GPT-5.4 remains the more capable all-rounder.
DeepSeek R1
Open-source o1-class reasoning at a fraction of the cost.
GPT-5.4
Best for agentic automation and desktop control workflows.
| DeepSeek R1 | GPT-5.4 | |
|---|---|---|
| Input cost / 1M tokens | $$0.55/1M | $$2.50/1M |
| Output cost / 1M tokens | $$2.19/1M | $$15.00/1M |
| Context window | 128k tokens | 272k tokens |
| Speed | Deliberate | Balanced |
| Price tier | Budget | Premium |
Which model wins for each use case — and why.
DeepSeek R1 was built specifically for chain-of-thought reasoning. It matches o1-level performance on math and logic benchmarks at a fraction of the price.
GPT-5.4 scores 74.9% on SWE-bench. DeepSeek R1 is strong at algorithmic problems but GPT-5.4 is the better choice for real-world software engineering.
DeepSeek R1 costs $0.55/1M input vs GPT-5.4's $2.50/1M — 4.5× cheaper for reasoning-level quality. For math, science, and logic pipelines, this is significant savings.
DeepSeek R1 is Deliberate (slow) by design — it thinks through problems step by step. GPT-5.4 is Balanced. For latency-sensitive applications, GPT-5.4 is faster.
GPT-5.4 has desktop computer-use via API. DeepSeek R1 has no agentic capabilities — it is purely a reasoning model.
Pick DeepSeek R1 if…
Pick GPT-5.4 if…
Is DeepSeek R1 better than ChatGPT for reasoning?
For pure math, logic, and step-by-step reasoning, DeepSeek R1 matches or beats GPT-5.4 at 4.5× lower cost. For general-purpose use, GPT-5.4 is more capable overall.
How much cheaper is DeepSeek R1 than ChatGPT?
DeepSeek R1 costs $0.55/1M input and $2.19/1M output. GPT-5.4 costs $2.50/1M input and $15/1M output. DeepSeek R1 is 4.5× cheaper on input and 6.8× cheaper on output.
Is DeepSeek R1 as good as OpenAI o1?
DeepSeek R1 matches o1 on several math and reasoning benchmarks, which is why its release in January 2025 was such a shock. It delivers comparable reasoning performance at a dramatically lower price.
Is DeepSeek R1 slow?
Yes — DeepSeek R1 is a thinking model that works through problems step by step. Responses take longer than standard models. This is by design and is the trade-off for higher reasoning quality.
Can I use DeepSeek R1 for coding?
Yes, and it's good at algorithmic and mathematical coding problems. For general software engineering tasks, GPT-5.4 or Claude Sonnet 4.6 are stronger choices.
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