Comparison

DeepSeek API vs OpenAI: Pricing & Performance Comparison (2026)

DeepSeek API is 35x cheaper than OpenAI GPT-4o. We compare pricing, performance, and API compatibility to help you choose the right LLM API for your project in 2026.

Published 2026-05-30 Updated 2026-05-30 7 min

DeepSeek API is 35x cheaper than OpenAI GPT-4o ($0.28/M vs $10/M output)
DeepSeek-V3 matches GPT-4o on most coding benchmarks (within 5%)
DeepSeek-R1 beats OpenAI o1-preview on MATH-500 (97.3% vs 93.4%)
Fully OpenAI-compatible: migration takes < 5 minutes

Quick Comparison Table

Feature	DeepSeek API (V3)	OpenAI GPT-4o	Winner
Input price (per 1M tokens)	$0.14	$2.50	🏆 DeepSeek
Output price (per 1M tokens)	$0.28	$10.00	🏆 DeepSeek
OpenAI-compatible	✅ Yes	✅ Yes	Tie

Verdict: Use DeepSeek for cost-sensitive production workloads. Use OpenAI if you need the absolute best coding performance.

Pricing Deep Dive

DeepSeek V3 official pricing: $0.14/M input, $0.28/M output.
OpenAI GPT-4o: $2.50/M input, $10.00/M output.

For a chatbot app processing 10M input + 5M output tokens/month:
- DeepSeek V3: $2.80/month
- OpenAI GPT-4o: $75.00/month
- Savings: 96%

Migration Guide: OpenAI → DeepSeek

Step 1: Get a DeepSeek API key from aicreditsapi.com (no +86 phone required).

Step 2: Update your code:

# Before (OpenAI)
client = openai.OpenAI(api_key="sk-openai-...")

# After (DeepSeek via AiCredits)
client = openai.OpenAI(
    api_key="sk-aicredits-...",
    base_url="https://api.aicreditsapi.com/v1"
)