Head-to-Head API Cost Benchmark

DeepSeek-V3 (Chat) vs OpenAI o3-mini: API Price & Latency Comparison

On a standard B2B production workload (5,000 req/day), DeepSeek-V3 (Chat) is 77.4% cheaper ($129.75/mo vs $573.38/mo), while OpenAI o3-mini leads in token generation speed (95 tok/s).

Side-by-Side Specification & Billing Matrix

Metric DeepSeek-V3 (Chat) (DeepSeek API) OpenAI o3-mini (OpenAI) Advantage
Standard Input / 1M Tokens $0.270 $1.100 DeepSeek-V3 (Chat)
Cached Input / 1M Tokens $0.070 $0.550 DeepSeek-V3 (Chat)
Output Generation / 1M Tokens $1.10 $4.40 DeepSeek-V3 (Chat)
Intelligence / Benchmark Quality 1282 LMSYS Elo 1305 LMSYS Elo OpenAI o3-mini
Monthly Spend (5k req/day, 50% cache) $129.75 / mo $573.38 / mo DeepSeek-V3 (Chat) (-77.4%)
Context Window 64,000 tokens 200,000 tokens OpenAI o3-mini
Output Speed (Throughput) 60 tokens/sec 95 tokens/sec OpenAI o3-mini
Batch API Discount -50% (DeepSeek API) -50% (OpenAI) DeepSeek API
Primary Workload Fit High-intelligence general tasks & translation where prompt caching saves 75%+ Algorithmic code generation, math, STEM reasoning, automated QA agents Workload Dependent
Deploy / Console Access Try DeepSeek-V3 (Chat) → Try OpenAI o3-mini → Open Full Simulator